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5014 lines
149 KiB
5014 lines
149 KiB
11 years ago
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//===-- ARMDisassembler.cpp - Disassembler for ARM/Thumb ISA --------------===//
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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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/* Capstone Disassembler Engine */
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/* By Nguyen Anh Quynh <aquynh@gmail.com>, 2013> */
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#include <stdio.h>
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#include <string.h>
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#include "ARMAddressingModes.h"
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#include "ARMBaseInfo.h"
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#include "../../SubtargetFeature.h"
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#include "../../MCFixedLenDisassembler.h"
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#include "../../MCInst.h"
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#include "../../MCInstrDesc.h"
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#include "../../MCRegisterInfo.h"
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#include "../../LEB128.h"
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#include "../../MCDisassembler.h"
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#include "ARMDisassembler.h"
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//#define GET_REGINFO_ENUM
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//#include "X86GenRegisterInfo.inc"
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#define GET_INSTRINFO_MC_DESC
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#include "ARMGenInstrInfo.inc"
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#define GET_INSTRINFO_ENUM
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#include "ARMGenInstrInfo.inc"
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typedef struct ITStatus {
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//std_vector<unsigned char> ITStates;
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unsigned char ITStates[128]; // FIXME
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unsigned int size;
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} ITStatus;
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static bool ITStatus_push_back(ITStatus *it, char v)
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{
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it->ITStates[it->size] = v;
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it->size++;
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return true;
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}
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// Returns true if the current instruction is in an IT block
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static bool ITStatus_instrInITBlock(ITStatus *it)
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{
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//return !ITStates.empty();
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return (it->size > 0);
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}
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// Returns true if current instruction is the last instruction in an IT block
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static bool ITStatus_instrLastInITBlock(ITStatus *it)
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{
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return (it->size == 1);
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}
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// Handles the condition code status of instructions in IT blocks
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// Returns the condition code for instruction in IT block
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static unsigned ITStatus_getITCC(ITStatus *it)
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{
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unsigned CC = ARMCC_AL;
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if (ITStatus_instrInITBlock(it))
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//CC = ITStates.back();
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CC = it->ITStates[it->size-1];
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return CC;
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}
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// Advances the IT block state to the next T or E
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static void ITStatus_advanceITState(ITStatus *it)
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{
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//ITStates.pop_back();
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it->size--;
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}
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// Called when decoding an IT instruction. Sets the IT state for the following
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// instructions that for the IT block. Firstcond and Mask correspond to the
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// fields in the IT instruction encoding.
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static void ITStatus_setITState(ITStatus *it, char Firstcond, char Mask)
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{
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// (3 - the number of trailing zeros) is the number of then / else.
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unsigned CondBit0 = Firstcond & 1;
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unsigned NumTZ = CountTrailingZeros_32(Mask);
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unsigned char CCBits = (unsigned char)Firstcond & 0xf;
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unsigned Pos;
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//assert(NumTZ <= 3 && "Invalid IT mask!");
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// push condition codes onto the stack the correct order for the pops
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for (Pos = NumTZ+1; Pos <= 3; ++Pos) {
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bool T = ((Mask >> Pos) & 1) == CondBit0;
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if (T)
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ITStatus_push_back(it, CCBits);
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else
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ITStatus_push_back(it, CCBits ^ 1);
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}
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ITStatus_push_back(it, CCBits);
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}
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/// ThumbDisassembler - Thumb disassembler for all Thumb platforms.
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// FIXME: make this ITBlock private for each Disassembler handle
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static ITStatus ITBlock;
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static bool Check(DecodeStatus *Out, DecodeStatus In)
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{
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switch (In) {
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case MCDisassembler_Success:
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// Out stays the same.
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return true;
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case MCDisassembler_SoftFail:
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*Out = In;
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return true;
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case MCDisassembler_Fail:
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*Out = In;
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return false;
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default: // never reached
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return false;
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}
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}
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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 DecodeGPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeGPRnopcRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const void *Decoder);
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static DecodeStatus DecodetGPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodetcGPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecoderGPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeGPRPairRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPR_8RegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPR_VFP2RegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeQPRRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPairRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst *Inst,
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unsigned RegNo, uint64_t Address, const void *Decoder);
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static DecodeStatus DecodePredicateOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCCOutOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSOImmOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeRegListOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSPRRegListOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDPRRegListOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeBitfieldMaskOperand(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCopMemInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst *Inst,
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unsigned Insn, uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSORegMemOperand(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode3Instruction(MCInst *Inst,unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSORegImmOperand(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSORegRegOperand(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst * Inst,
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unsigned Insn, uint64_t Adddress, const void *Decoder);
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static DecodeStatus DecodeT2MOVTWInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeArmMOVTWInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSMLAInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCPSInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2CPSInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrModeImm12Operand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode5Operand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode7Operand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeT2BInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeBranchImmInstruction(MCInst *Inst,unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeAddrMode6Operand(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLDST1Instruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLDST2Instruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLDST3Instruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLDST4Instruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLDInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVSTInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD1DupInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD2DupInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD3DupInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD4DupInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeNEONModImmInstruction(MCInst *Inst,unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVSHLMaxInstruction(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight8Imm(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight16Imm(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight32Imm(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeShiftRight64Imm(MCInst *Inst, unsigned Val,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeTBLInstruction(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodePostIdxReg(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeCoprocessor(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMemBarrierOption(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeInstSyncBarrierOption(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeMSRMask(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDoubleRegLoad(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeDoubleRegStore(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeLDRPreImm(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeLDRPreReg(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSTRPreImm(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeSTRPreReg(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD1LN(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD2LN(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD3LN(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVLD4LN(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
|
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|
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static DecodeStatus DecodeVST1LN(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
|
||
|
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static DecodeStatus DecodeVST2LN(MCInst *Inst, unsigned Insn,
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|
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uint64_t Address, const void *Decoder);
|
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|
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static DecodeStatus DecodeVST3LN(MCInst *Inst, unsigned Insn,
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|
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uint64_t Address, const void *Decoder);
|
||
|
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static DecodeStatus DecodeVST4LN(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
|
||
|
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static DecodeStatus DecodeVMOVSRR(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
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static DecodeStatus DecodeVMOVRRS(MCInst *Inst, unsigned Insn,
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uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeSwap(MCInst *Inst, unsigned Insn,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
|
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static DecodeStatus DecodeVCVTD(MCInst *Inst, unsigned Insn,
|
||
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uint64_t Address, const void *Decoder);
|
||
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static DecodeStatus DecodeVCVTQ(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbAddSpecialReg(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbBROperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
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static DecodeStatus DecodeT2BROperand(MCInst *Inst, unsigned Val,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
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|
static DecodeStatus DecodeThumbCmpBROperand(MCInst *Inst, unsigned Val,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbAddrModeRR(MCInst *Inst, unsigned Val,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
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|
static DecodeStatus DecodeThumbAddrModeIS(MCInst *Inst, unsigned Val,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbAddrModePC(MCInst *Inst, unsigned Val,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbAddrModeSP(MCInst *Inst, unsigned Val,
|
||
|
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uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2AddrModeSOReg(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2LoadShift(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2LoadImm8(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder);
|
||
|
|
static DecodeStatus DecodeT2LoadImm12(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder);
|
||
|
|
static DecodeStatus DecodeT2LoadT(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder);
|
||
|
|
static DecodeStatus DecodeT2LoadLabel(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder);
|
||
|
|
static DecodeStatus DecodeT2Imm8S4(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm8s4(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst *Inst,unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2Imm8(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm8(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbAddSPImm(MCInst *Inst, uint16_t Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbAddSPReg(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbCPS(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeQADDInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbBLXOffset(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm12(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbTableBranch(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumb2BCCInstruction(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2SOImm(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbBCCTargetOperand(MCInst *Inst,unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeThumbBLTargetOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeIT(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2LDRDPreInstruction(MCInst *Inst,unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2STRDPreInstruction(MCInst *Inst,unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2Adr(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2LdStPre(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeT2ShifterImmOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
|
||
|
|
static DecodeStatus DecodeLDR(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
static DecodeStatus DecodeMRRC2(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder);
|
||
|
|
#define GET_SUBTARGETINFO_ENUM
|
||
|
|
#include "ARMGenSubtargetInfo.inc"
|
||
|
|
|
||
|
|
#define GET_SUBTARGETINFO_MC_DESC
|
||
|
|
#include "ARMGenSubtargetInfo.inc"
|
||
|
|
|
||
|
|
// Hacky: enable all features for disassembler
|
||
|
|
static uint64_t ARM_getFeatureBits(int mode)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
uint64_t Bits = 0;
|
||
|
|
for (i = 0; i < sizeof(ARMFeatureKV)/sizeof(ARMFeatureKV[0]); i++) {
|
||
|
|
Bits |= ARMFeatureKV[i].Value;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mode == 4)
|
||
|
|
Bits -= ARM_ModeThumb;
|
||
|
|
|
||
|
|
return Bits;
|
||
|
|
}
|
||
|
|
|
||
|
|
#include "ARMGenDisassemblerTables.inc"
|
||
|
|
|
||
|
|
static DecodeStatus DecodePredicateOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (Val == 0xF) return MCDisassembler_Fail;
|
||
|
|
// AL predicate is not allowed on Thumb1 branches.
|
||
|
|
if (MCInst_getOpcode(Inst) == ARM_tBcc && Val == 0xE)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
if (Val == ARMCC_AL) {
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_CPSR));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define GET_REGINFO_MC_DESC
|
||
|
|
#include "ARMGenRegisterInfo.inc"
|
||
|
|
void ARM_init(MCRegisterInfo *MRI)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
InitMCRegisterInfo(ARMRegDesc, 288,
|
||
|
|
RA, PC,
|
||
|
|
ARMMCRegisterClasses, 100,
|
||
|
|
ARMRegUnitRoots, 76, ARMRegDiffLists, ARMRegStrings,
|
||
|
|
ARMSubRegIdxLists, 57,
|
||
|
|
ARMSubRegIdxRanges, ARMRegEncodingTable);
|
||
|
|
*/
|
||
|
|
|
||
|
|
MCRegisterInfo_InitMCRegisterInfo(MRI, ARMRegDesc, 288,
|
||
|
|
0, 0,
|
||
|
|
ARMMCRegisterClasses, 100,
|
||
|
|
0, 0, ARMRegDiffLists, 0,
|
||
|
|
ARMSubRegIdxLists, 57,
|
||
|
|
0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus _ARM_getInstruction(MCInst *MI, char *code, uint64_t code_len,
|
||
|
|
uint16_t *Size, uint64_t Address)
|
||
|
|
{
|
||
|
|
uint8_t bytes[4];
|
||
|
|
|
||
|
|
ITBlock.size = 0;
|
||
|
|
|
||
|
|
//assert(!(STI.getFeatureBits() & ARM_ModeThumb) &&
|
||
|
|
// "Asked to disassemble an ARM instruction but Subtarget is in Thumb mode!");
|
||
|
|
|
||
|
|
if (code_len < 4)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
memcpy(bytes, code, 4);
|
||
|
|
|
||
|
|
// Encoded as a small-endian 32-bit word in the stream.
|
||
|
|
uint32_t insn = (bytes[3] << 24) |
|
||
|
|
(bytes[2] << 16) |
|
||
|
|
(bytes[1] << 8) |
|
||
|
|
(bytes[0] << 0);
|
||
|
|
|
||
|
|
// Calling the auto-generated decoder function.
|
||
|
|
DecodeStatus result = decodeInstruction_4(DecoderTableARM32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
// VFP and NEON instructions, similarly, are shared between ARM
|
||
|
|
// and Thumb modes.
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableVFP32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableVFPV832, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableNEONData32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
// Add a fake predicate operand, because we share these instruction
|
||
|
|
// definitions with Thumb2 where these instructions are predicable.
|
||
|
|
if (!DecodePredicateOperand(MI, 0xE, Address, NULL))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableNEONLoadStore32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
// Add a fake predicate operand, because we share these instruction
|
||
|
|
// definitions with Thumb2 where these instructions are predicable.
|
||
|
|
if (!DecodePredicateOperand(MI, 0xE, Address, NULL))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableNEONDup32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
// Add a fake predicate operand, because we share these instruction
|
||
|
|
// definitions with Thumb2 where these instructions are predicable.
|
||
|
|
if (!DecodePredicateOperand(MI, 0xE, Address, NULL))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTablev8NEON32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTablev8Crypto32, MI, insn, Address, 4);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
*Size = 0;
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Thumb1 instructions don't have explicit S bits. Rather, they
|
||
|
|
// implicitly set CPSR. Since it's not represented in the encoding, the
|
||
|
|
// auto-generated decoder won't inject the CPSR operand. We need to fix
|
||
|
|
// that as a post-pass.
|
||
|
|
static void AddThumb1SBit(MCInst *MI, bool InITBlock)
|
||
|
|
{
|
||
|
|
MCOperandInfo *OpInfo = ARMInsts[MCInst_getOpcode(MI)].OpInfo;
|
||
|
|
unsigned short NumOps = ARMInsts[MCInst_getOpcode(MI)].NumOperands;
|
||
|
|
unsigned i;
|
||
|
|
|
||
|
|
for (i = 0; i < NumOps; ++i) {
|
||
|
|
if (i == MCInst_getNumOperands(MI)) break;
|
||
|
|
if (MCOperandInfo_isOptionalDef(&OpInfo[i]) && OpInfo[i].RegClass == ARM_CCRRegClassID) {
|
||
|
|
if (i > 0 && MCOperandInfo_isPredicate(&OpInfo[i-1])) continue;
|
||
|
|
MCInst_insert(MI, i, MCOperand_CreateReg(InITBlock ? 0 : ARM_CPSR));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//MI.insert(I, MCOperand_CreateReg(InITBlock ? 0 : ARM_CPSR));
|
||
|
|
MCInst_insert(MI, i, MCOperand_CreateReg(InITBlock ? 0 : ARM_CPSR));
|
||
|
|
}
|
||
|
|
|
||
|
|
// Most Thumb instructions don't have explicit predicates in the
|
||
|
|
// encoding, but rather get their predicates from IT context. We need
|
||
|
|
// to fix up the predicate operands using this context information as a
|
||
|
|
// post-pass.
|
||
|
|
static DecodeStatus AddThumbPredicate(MCInst *MI)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// A few instructions actually have predicates encoded in them. Don't
|
||
|
|
// try to overwrite it if we're seeing one of those.
|
||
|
|
switch (MCInst_getOpcode(MI)) {
|
||
|
|
case ARM_tBcc:
|
||
|
|
case ARM_t2Bcc:
|
||
|
|
case ARM_tCBZ:
|
||
|
|
case ARM_tCBNZ:
|
||
|
|
case ARM_tCPS:
|
||
|
|
case ARM_t2CPS3p:
|
||
|
|
case ARM_t2CPS2p:
|
||
|
|
case ARM_t2CPS1p:
|
||
|
|
case ARM_tMOVSr:
|
||
|
|
case ARM_tSETEND:
|
||
|
|
// Some instructions (mostly conditional branches) are not
|
||
|
|
// allowed in IT blocks.
|
||
|
|
if (ITStatus_instrInITBlock(&ITBlock))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
else
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
break;
|
||
|
|
case ARM_tB:
|
||
|
|
case ARM_t2B:
|
||
|
|
case ARM_t2TBB:
|
||
|
|
case ARM_t2TBH:
|
||
|
|
// Some instructions (mostly unconditional branches) can
|
||
|
|
// only appears at the end of, or outside of, an IT.
|
||
|
|
//if (ITBlock.instrInITBlock() && !ITBlock.instrLastInITBlock())
|
||
|
|
if (ITStatus_instrInITBlock(&ITBlock) && !ITStatus_instrLastInITBlock(&ITBlock))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If we're in an IT block, base the predicate on that. Otherwise,
|
||
|
|
// assume a predicate of AL.
|
||
|
|
unsigned CC;
|
||
|
|
CC = ITStatus_getITCC(&ITBlock);
|
||
|
|
if (CC == 0xF)
|
||
|
|
CC = ARMCC_AL;
|
||
|
|
if (ITStatus_instrInITBlock(&ITBlock))
|
||
|
|
ITStatus_advanceITState(&ITBlock);
|
||
|
|
|
||
|
|
MCOperandInfo *OpInfo = ARMInsts[MCInst_getOpcode(MI)].OpInfo;
|
||
|
|
unsigned short NumOps = ARMInsts[MCInst_getOpcode(MI)].NumOperands;
|
||
|
|
unsigned i;
|
||
|
|
for (i = 0; i < NumOps; ++i) {
|
||
|
|
if (i == MCInst_getNumOperands(MI)) break;
|
||
|
|
if (MCOperandInfo_isPredicate(&OpInfo[i])) {
|
||
|
|
MCInst_insert(MI, i, MCOperand_CreateImm(CC));
|
||
|
|
if (CC == ARMCC_AL)
|
||
|
|
MCInst_insert(MI, i+1, MCOperand_CreateReg(0));
|
||
|
|
else
|
||
|
|
MCInst_insert(MI, i+1, MCOperand_CreateReg(ARM_CPSR));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_insert(MI, i, MCOperand_CreateImm(CC));
|
||
|
|
if (CC == ARMCC_AL)
|
||
|
|
MCInst_insert(MI, i+1, MCOperand_CreateReg(0));
|
||
|
|
else
|
||
|
|
MCInst_insert(MI, i+1, MCOperand_CreateReg(ARM_CPSR));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Thumb VFP instructions are a special case. Because we share their
|
||
|
|
// encodings between ARM and Thumb modes, and they are predicable in ARM
|
||
|
|
// mode, the auto-generated decoder will give them an (incorrect)
|
||
|
|
// predicate operand. We need to rewrite these operands based on the IT
|
||
|
|
// context as a post-pass.
|
||
|
|
static void UpdateThumbVFPPredicate(MCInst *MI)
|
||
|
|
{
|
||
|
|
unsigned CC;
|
||
|
|
CC = ITStatus_getITCC(&ITBlock);
|
||
|
|
if (ITStatus_instrInITBlock(&ITBlock))
|
||
|
|
ITStatus_advanceITState(&ITBlock);
|
||
|
|
|
||
|
|
MCOperandInfo *OpInfo = ARMInsts[MCInst_getOpcode(MI)].OpInfo;
|
||
|
|
unsigned short NumOps = ARMInsts[MCInst_getOpcode(MI)].NumOperands;
|
||
|
|
unsigned i;
|
||
|
|
for (i = 0; i < NumOps; ++i) {
|
||
|
|
if (MCOperandInfo_isPredicate(&OpInfo[i])) {
|
||
|
|
MCOperand_setImm(MCInst_getOperand(MI, i), CC);
|
||
|
|
if (CC == ARMCC_AL)
|
||
|
|
MCOperand_setReg(MCInst_getOperand(MI, i+1), 0);
|
||
|
|
else
|
||
|
|
MCOperand_setReg(MCInst_getOperand(MI, i+1), ARM_CPSR);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus _Thumb_getInstruction(MCInst *MI, char *code, uint64_t code_len,
|
||
|
|
uint16_t *Size, uint64_t Address)
|
||
|
|
{
|
||
|
|
uint8_t bytes[4];
|
||
|
|
|
||
|
|
ITBlock.size = 0;
|
||
|
|
|
||
|
|
//assert((STI.getFeatureBits() & ARM_ModeThumb) &&
|
||
|
|
// "Asked to disassemble in Thumb mode but Subtarget is in ARM mode!");
|
||
|
|
|
||
|
|
// We want to read exactly 2 bytes of data.
|
||
|
|
if (code_len < 2)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
memcpy(bytes, code, 2);
|
||
|
|
|
||
|
|
uint16_t insn16 = (bytes[1] << 8) | bytes[0];
|
||
|
|
DecodeStatus result = decodeInstruction_2(DecoderTableThumb16, MI, insn16, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 2;
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_2(DecoderTableThumbSBit16, MI, insn16, Address, 2);
|
||
|
|
if (result) {
|
||
|
|
*Size = 2;
|
||
|
|
bool InITBlock = ITStatus_instrInITBlock(&ITBlock);
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
AddThumb1SBit(MI, InITBlock);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_2(DecoderTableThumb216, MI, insn16, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 2;
|
||
|
|
|
||
|
|
// Nested IT blocks are UNPREDICTABLE. Must be checked before we add
|
||
|
|
// the Thumb predicate.
|
||
|
|
if (MCInst_getOpcode(MI) == ARM_t2IT && ITStatus_instrInITBlock(&ITBlock))
|
||
|
|
result = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
|
||
|
|
// If we find an IT instruction, we need to parse its condition
|
||
|
|
// code and mask operands so that we can apply them correctly
|
||
|
|
// to the subsequent instructions.
|
||
|
|
if (MCInst_getOpcode(MI) == ARM_t2IT) {
|
||
|
|
|
||
|
|
unsigned Firstcond = MCOperand_getImm(MCInst_getOperand(MI, 0));
|
||
|
|
unsigned Mask = MCOperand_getImm(MCInst_getOperand(MI, 1));
|
||
|
|
ITStatus_setITState(&ITBlock, Firstcond, Mask);
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
// We want to read exactly 4 bytes of data.
|
||
|
|
//if (Region.readBytes(Address, 4, (uint8_t*)bytes, NULL) == -1) {
|
||
|
|
// *Size = 0;
|
||
|
|
// return MCDisassembler_Fail;
|
||
|
|
//}
|
||
|
|
|
||
|
|
memcpy(bytes, code, 4);
|
||
|
|
|
||
|
|
uint32_t insn32 = (bytes[3] << 8) |
|
||
|
|
(bytes[2] << 0) |
|
||
|
|
(bytes[1] << 24) |
|
||
|
|
(bytes[0] << 16);
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableThumb32, MI, insn32, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
bool InITBlock = ITStatus_instrInITBlock(&ITBlock);
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
AddThumb1SBit(MI, InITBlock);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableThumb232, MI, insn32, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableVFP32, MI, insn32, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
UpdateThumbVFPPredicate(MI);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fieldFromInstruction_4(insn32, 28, 4) == 0xE) {
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableVFP32, MI, insn32, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
UpdateThumbVFPPredicate(MI);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableVFPV832, MI, insn32, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fieldFromInstruction_4(insn32, 28, 4) == 0xE) {
|
||
|
|
MCInst_clear(MI);
|
||
|
|
result = decodeInstruction_4(DecoderTableNEONDup32, MI, insn32, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fieldFromInstruction_4(insn32, 24, 8) == 0xF9) {
|
||
|
|
MCInst_clear(MI);
|
||
|
|
uint32_t NEONLdStInsn = insn32;
|
||
|
|
NEONLdStInsn &= 0xF0FFFFFF;
|
||
|
|
NEONLdStInsn |= 0x04000000;
|
||
|
|
result = decodeInstruction_4(DecoderTableNEONLoadStore32, MI, NEONLdStInsn, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fieldFromInstruction_4(insn32, 24, 4) == 0xF) {
|
||
|
|
MCInst_clear(MI);
|
||
|
|
uint32_t NEONDataInsn = insn32;
|
||
|
|
NEONDataInsn &= 0xF0FFFFFF; // Clear bits 27-24
|
||
|
|
NEONDataInsn |= (NEONDataInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
|
||
|
|
NEONDataInsn |= 0x12000000; // Set bits 28 and 25
|
||
|
|
result = decodeInstruction_4(DecoderTableNEONData32, MI, NEONDataInsn, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
Check(&result, AddThumbPredicate(MI));
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
uint32_t NEONCryptoInsn = insn32;
|
||
|
|
NEONCryptoInsn &= 0xF0FFFFFF; // Clear bits 27-24
|
||
|
|
NEONCryptoInsn |= (NEONCryptoInsn & 0x10000000) >> 4; // Move bit 28 to bit 24
|
||
|
|
NEONCryptoInsn |= 0x12000000; // Set bits 28 and 25
|
||
|
|
result = decodeInstruction_4(DecoderTablev8Crypto32, MI, NEONCryptoInsn,
|
||
|
|
Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
uint32_t NEONv8Insn = insn32;
|
||
|
|
NEONv8Insn &= 0xF3FFFFFF; // Clear bits 27-26
|
||
|
|
result = decodeInstruction_4(DecoderTablev8NEON32, MI, NEONv8Insn, Address, 2);
|
||
|
|
if (result != MCDisassembler_Fail) {
|
||
|
|
*Size = 4;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_clear(MI);
|
||
|
|
*Size = 0;
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool Thumb_getInstruction(csh ud, char *code, uint64_t code_len, MCInst *instr,
|
||
|
|
uint16_t *size, uint64_t address, void *info)
|
||
|
|
{
|
||
|
|
//cs_struct *handle = (cs_struct *)ud;
|
||
|
|
DecodeStatus status = _Thumb_getInstruction(instr, code, code_len, size, address);
|
||
|
|
|
||
|
|
return status == MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ARM_getInstruction(csh ud, char *code, uint64_t code_len, MCInst *instr,
|
||
|
|
uint16_t *size, uint64_t address, void *info)
|
||
|
|
{
|
||
|
|
//cs_struct *handle = (cs_struct *)ud;
|
||
|
|
DecodeStatus status = _ARM_getInstruction(instr, code, code_len, size, address);
|
||
|
|
|
||
|
|
return status == MCDisassembler_Success;
|
||
|
|
//return status != MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t GPRDecoderTable[] = {
|
||
|
|
ARM_R0, ARM_R1, ARM_R2, ARM_R3,
|
||
|
|
ARM_R4, ARM_R5, ARM_R6, ARM_R7,
|
||
|
|
ARM_R8, ARM_R9, ARM_R10, ARM_R11,
|
||
|
|
ARM_R12, ARM_SP, ARM_LR, ARM_PC
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeGPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 15)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned Register = GPRDecoderTable[RegNo];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeGPRnopcRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
if (RegNo == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeGPRwithAPSRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
if (RegNo == 15) {
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_APSR_NZCV));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodetGPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 7)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t GPRPairDecoderTable[] = {
|
||
|
|
ARM_R0_R1, ARM_R2_R3, ARM_R4_R5, ARM_R6_R7,
|
||
|
|
ARM_R8_R9, ARM_R10_R11, ARM_R12_SP
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeGPRPairRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
if (RegNo > 13)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if ((RegNo & 1) || RegNo == 0xe)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
unsigned RegisterPair = GPRPairDecoderTable[RegNo/2];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(RegisterPair));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodetcGPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned Register = 0;
|
||
|
|
switch (RegNo) {
|
||
|
|
case 0:
|
||
|
|
Register = ARM_R0;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
Register = ARM_R1;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
Register = ARM_R2;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
Register = ARM_R3;
|
||
|
|
break;
|
||
|
|
case 9:
|
||
|
|
Register = ARM_R9;
|
||
|
|
break;
|
||
|
|
case 12:
|
||
|
|
Register = ARM_R12;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecoderGPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
if (RegNo == 13 || RegNo == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
Check(&S, DecodeGPRRegisterClass(Inst, RegNo, Address, Decoder));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t SPRDecoderTable[] = {
|
||
|
|
ARM_S0, ARM_S1, ARM_S2, ARM_S3,
|
||
|
|
ARM_S4, ARM_S5, ARM_S6, ARM_S7,
|
||
|
|
ARM_S8, ARM_S9, ARM_S10, ARM_S11,
|
||
|
|
ARM_S12, ARM_S13, ARM_S14, ARM_S15,
|
||
|
|
ARM_S16, ARM_S17, ARM_S18, ARM_S19,
|
||
|
|
ARM_S20, ARM_S21, ARM_S22, ARM_S23,
|
||
|
|
ARM_S24, ARM_S25, ARM_S26, ARM_S27,
|
||
|
|
ARM_S28, ARM_S29, ARM_S30, ARM_S31
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 31)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned Register = SPRDecoderTable[RegNo];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t DPRDecoderTable[] = {
|
||
|
|
ARM_D0, ARM_D1, ARM_D2, ARM_D3,
|
||
|
|
ARM_D4, ARM_D5, ARM_D6, ARM_D7,
|
||
|
|
ARM_D8, ARM_D9, ARM_D10, ARM_D11,
|
||
|
|
ARM_D12, ARM_D13, ARM_D14, ARM_D15,
|
||
|
|
ARM_D16, ARM_D17, ARM_D18, ARM_D19,
|
||
|
|
ARM_D20, ARM_D21, ARM_D22, ARM_D23,
|
||
|
|
ARM_D24, ARM_D25, ARM_D26, ARM_D27,
|
||
|
|
ARM_D28, ARM_D29, ARM_D30, ARM_D31
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 31)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned Register = DPRDecoderTable[RegNo];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDPR_8RegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 7)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus
|
||
|
|
DecodeDPR_VFP2RegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 15)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return DecodeDPRRegisterClass(Inst, RegNo, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t QPRDecoderTable[] = {
|
||
|
|
ARM_Q0, ARM_Q1, ARM_Q2, ARM_Q3,
|
||
|
|
ARM_Q4, ARM_Q5, ARM_Q6, ARM_Q7,
|
||
|
|
ARM_Q8, ARM_Q9, ARM_Q10, ARM_Q11,
|
||
|
|
ARM_Q12, ARM_Q13, ARM_Q14, ARM_Q15
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeQPRRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 31 || (RegNo & 1) != 0)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
RegNo >>= 1;
|
||
|
|
|
||
|
|
unsigned Register = QPRDecoderTable[RegNo];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t DPairDecoderTable[] = {
|
||
|
|
ARM_Q0, ARM_D1_D2, ARM_Q1, ARM_D3_D4, ARM_Q2, ARM_D5_D6,
|
||
|
|
ARM_Q3, ARM_D7_D8, ARM_Q4, ARM_D9_D10, ARM_Q5, ARM_D11_D12,
|
||
|
|
ARM_Q6, ARM_D13_D14, ARM_Q7, ARM_D15_D16, ARM_Q8, ARM_D17_D18,
|
||
|
|
ARM_Q9, ARM_D19_D20, ARM_Q10, ARM_D21_D22, ARM_Q11, ARM_D23_D24,
|
||
|
|
ARM_Q12, ARM_D25_D26, ARM_Q13, ARM_D27_D28, ARM_Q14, ARM_D29_D30,
|
||
|
|
ARM_Q15
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDPairRegisterClass(MCInst *Inst, unsigned RegNo,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 30)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned Register = DPairDecoderTable[RegNo];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const uint16_t DPairSpacedDecoderTable[] = {
|
||
|
|
ARM_D0_D2, ARM_D1_D3, ARM_D2_D4, ARM_D3_D5,
|
||
|
|
ARM_D4_D6, ARM_D5_D7, ARM_D6_D8, ARM_D7_D9,
|
||
|
|
ARM_D8_D10, ARM_D9_D11, ARM_D10_D12, ARM_D11_D13,
|
||
|
|
ARM_D12_D14, ARM_D13_D15, ARM_D14_D16, ARM_D15_D17,
|
||
|
|
ARM_D16_D18, ARM_D17_D19, ARM_D18_D20, ARM_D19_D21,
|
||
|
|
ARM_D20_D22, ARM_D21_D23, ARM_D22_D24, ARM_D23_D25,
|
||
|
|
ARM_D24_D26, ARM_D25_D27, ARM_D26_D28, ARM_D27_D29,
|
||
|
|
ARM_D28_D30, ARM_D29_D31
|
||
|
|
};
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDPairSpacedRegisterClass(MCInst *Inst,
|
||
|
|
unsigned RegNo, uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (RegNo > 29)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned Register = DPairSpacedDecoderTable[RegNo];
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(Register));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeCCOutOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (Val)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_CPSR));
|
||
|
|
else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSOImmOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
uint32_t imm = Val & 0xFF;
|
||
|
|
uint32_t rot = (Val & 0xF00) >> 7;
|
||
|
|
uint32_t rot_imm = (imm >> rot) | (imm << ((32-rot) & 0x1F));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(rot_imm));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSORegImmOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
|
||
|
|
unsigned type = fieldFromInstruction_4(Val, 5, 2);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 7, 5);
|
||
|
|
|
||
|
|
// Register-immediate
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
ARM_AM_ShiftOpc Shift = ARM_AM_lsl;
|
||
|
|
switch (type) {
|
||
|
|
case 0:
|
||
|
|
Shift = ARM_AM_lsl;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
Shift = ARM_AM_lsr;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
Shift = ARM_AM_asr;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
Shift = ARM_AM_ror;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Shift == ARM_AM_ror && imm == 0)
|
||
|
|
Shift = ARM_AM_rrx;
|
||
|
|
|
||
|
|
unsigned Op = Shift | (imm << 3);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Op));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSORegRegOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
|
||
|
|
unsigned type = fieldFromInstruction_4(Val, 5, 2);
|
||
|
|
unsigned Rs = fieldFromInstruction_4(Val, 8, 4);
|
||
|
|
|
||
|
|
// Register-register
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rs, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
ARM_AM_ShiftOpc Shift = ARM_AM_lsl;
|
||
|
|
switch (type) {
|
||
|
|
case 0:
|
||
|
|
Shift = ARM_AM_lsl;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
Shift = ARM_AM_lsr;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
Shift = ARM_AM_asr;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
Shift = ARM_AM_ror;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Shift));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeRegListOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
bool writebackLoad = false;
|
||
|
|
unsigned writebackReg = 0;
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
case ARM_LDMIA_UPD:
|
||
|
|
case ARM_LDMDB_UPD:
|
||
|
|
case ARM_LDMIB_UPD:
|
||
|
|
case ARM_LDMDA_UPD:
|
||
|
|
case ARM_t2LDMIA_UPD:
|
||
|
|
case ARM_t2LDMDB_UPD:
|
||
|
|
writebackLoad = true;
|
||
|
|
writebackReg = MCOperand_getReg(MCInst_getOperand(Inst, 0));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Empty register lists are not allowed.
|
||
|
|
if (Val == 0) return MCDisassembler_Fail;
|
||
|
|
unsigned i;
|
||
|
|
for (i = 0; i < 16; ++i) {
|
||
|
|
if (Val & (1 << i)) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, i, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// Writeback not allowed if Rn is in the target list.
|
||
|
|
if (writebackLoad && writebackReg == MCOperand_getReg(&(Inst->Operands[Inst->size-1])))
|
||
|
|
Check(&S, MCDisassembler_SoftFail);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSPRRegListOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Vd = fieldFromInstruction_4(Val, 8, 5);
|
||
|
|
unsigned regs = fieldFromInstruction_4(Val, 0, 8);
|
||
|
|
|
||
|
|
// In case of unpredictable encoding, tweak the operands.
|
||
|
|
if (regs == 0 || (Vd + regs) > 32) {
|
||
|
|
regs = Vd + regs > 32 ? 32 - Vd : regs;
|
||
|
|
regs = (1u > regs? 1u : regs);
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeSPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
unsigned i;
|
||
|
|
for (i = 0; i < (regs - 1); ++i) {
|
||
|
|
if (!Check(&S, DecodeSPRRegisterClass(Inst, ++Vd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDPRRegListOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Vd = fieldFromInstruction_4(Val, 8, 5);
|
||
|
|
unsigned regs = fieldFromInstruction_4(Val, 1, 7);
|
||
|
|
|
||
|
|
// In case of unpredictable encoding, tweak the operands.
|
||
|
|
if (regs == 0 || regs > 16 || (Vd + regs) > 32) {
|
||
|
|
regs = Vd + regs > 32 ? 32 - Vd : regs;
|
||
|
|
regs = (1u > regs? 1u : regs);
|
||
|
|
regs = (16u > regs? regs : 16u);
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
unsigned i;
|
||
|
|
for (i = 0; i < (regs - 1); ++i) {
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, ++Vd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeBitfieldMaskOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
// This operand encodes a mask of contiguous zeros between a specified MSB
|
||
|
|
// and LSB. To decode it, we create the mask of all bits MSB-and-lower,
|
||
|
|
// the mask of all bits LSB-and-lower, and then xor them to create
|
||
|
|
// the mask of that's all ones on [msb, lsb]. Finally we not it to
|
||
|
|
// create the final mask.
|
||
|
|
unsigned msb = fieldFromInstruction_4(Val, 5, 5);
|
||
|
|
unsigned lsb = fieldFromInstruction_4(Val, 0, 5);
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
if (lsb > msb) {
|
||
|
|
Check(&S, MCDisassembler_SoftFail);
|
||
|
|
// The check above will cause the warning for the "potentially undefined
|
||
|
|
// instruction encoding" but we can't build a bad MCOperand value here
|
||
|
|
// with a lsb > msb or else printing the MCInst will cause a crash.
|
||
|
|
lsb = msb;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t msb_mask = 0xFFFFFFFF;
|
||
|
|
if (msb != 31) msb_mask = (1U << (msb+1)) - 1;
|
||
|
|
uint32_t lsb_mask = (1U << lsb) - 1;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(~(msb_mask ^ lsb_mask)));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeCopMemInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned CRd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned coproc = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_LDC_OFFSET:
|
||
|
|
case ARM_LDC_PRE:
|
||
|
|
case ARM_LDC_POST:
|
||
|
|
case ARM_LDC_OPTION:
|
||
|
|
case ARM_LDCL_OFFSET:
|
||
|
|
case ARM_LDCL_PRE:
|
||
|
|
case ARM_LDCL_POST:
|
||
|
|
case ARM_LDCL_OPTION:
|
||
|
|
case ARM_STC_OFFSET:
|
||
|
|
case ARM_STC_PRE:
|
||
|
|
case ARM_STC_POST:
|
||
|
|
case ARM_STC_OPTION:
|
||
|
|
case ARM_STCL_OFFSET:
|
||
|
|
case ARM_STCL_PRE:
|
||
|
|
case ARM_STCL_POST:
|
||
|
|
case ARM_STCL_OPTION:
|
||
|
|
case ARM_t2LDC_OFFSET:
|
||
|
|
case ARM_t2LDC_PRE:
|
||
|
|
case ARM_t2LDC_POST:
|
||
|
|
case ARM_t2LDC_OPTION:
|
||
|
|
case ARM_t2LDCL_OFFSET:
|
||
|
|
case ARM_t2LDCL_PRE:
|
||
|
|
case ARM_t2LDCL_POST:
|
||
|
|
case ARM_t2LDCL_OPTION:
|
||
|
|
case ARM_t2STC_OFFSET:
|
||
|
|
case ARM_t2STC_PRE:
|
||
|
|
case ARM_t2STC_POST:
|
||
|
|
case ARM_t2STC_OPTION:
|
||
|
|
case ARM_t2STCL_OFFSET:
|
||
|
|
case ARM_t2STCL_PRE:
|
||
|
|
case ARM_t2STCL_POST:
|
||
|
|
case ARM_t2STCL_OPTION:
|
||
|
|
if (coproc == 0xA || coproc == 0xB)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(coproc));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(CRd));
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDC2_OFFSET:
|
||
|
|
case ARM_t2LDC2L_OFFSET:
|
||
|
|
case ARM_t2LDC2_PRE:
|
||
|
|
case ARM_t2LDC2L_PRE:
|
||
|
|
case ARM_t2STC2_OFFSET:
|
||
|
|
case ARM_t2STC2L_OFFSET:
|
||
|
|
case ARM_t2STC2_PRE:
|
||
|
|
case ARM_t2STC2L_PRE:
|
||
|
|
case ARM_LDC2_OFFSET:
|
||
|
|
case ARM_LDC2L_OFFSET:
|
||
|
|
case ARM_LDC2_PRE:
|
||
|
|
case ARM_LDC2L_PRE:
|
||
|
|
case ARM_STC2_OFFSET:
|
||
|
|
case ARM_STC2L_OFFSET:
|
||
|
|
case ARM_STC2_PRE:
|
||
|
|
case ARM_STC2L_PRE:
|
||
|
|
case ARM_t2LDC_OFFSET:
|
||
|
|
case ARM_t2LDCL_OFFSET:
|
||
|
|
case ARM_t2LDC_PRE:
|
||
|
|
case ARM_t2LDCL_PRE:
|
||
|
|
case ARM_t2STC_OFFSET:
|
||
|
|
case ARM_t2STCL_OFFSET:
|
||
|
|
case ARM_t2STC_PRE:
|
||
|
|
case ARM_t2STCL_PRE:
|
||
|
|
case ARM_LDC_OFFSET:
|
||
|
|
case ARM_LDCL_OFFSET:
|
||
|
|
case ARM_LDC_PRE:
|
||
|
|
case ARM_LDCL_PRE:
|
||
|
|
case ARM_STC_OFFSET:
|
||
|
|
case ARM_STCL_OFFSET:
|
||
|
|
case ARM_STC_PRE:
|
||
|
|
case ARM_STCL_PRE:
|
||
|
|
imm = ARM_AM_getAM5Opc(U ? ARM_AM_add : ARM_AM_sub, imm);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
break;
|
||
|
|
case ARM_t2LDC2_POST:
|
||
|
|
case ARM_t2LDC2L_POST:
|
||
|
|
case ARM_t2STC2_POST:
|
||
|
|
case ARM_t2STC2L_POST:
|
||
|
|
case ARM_LDC2_POST:
|
||
|
|
case ARM_LDC2L_POST:
|
||
|
|
case ARM_STC2_POST:
|
||
|
|
case ARM_STC2L_POST:
|
||
|
|
case ARM_t2LDC_POST:
|
||
|
|
case ARM_t2LDCL_POST:
|
||
|
|
case ARM_t2STC_POST:
|
||
|
|
case ARM_t2STCL_POST:
|
||
|
|
case ARM_LDC_POST:
|
||
|
|
case ARM_LDCL_POST:
|
||
|
|
case ARM_STC_POST:
|
||
|
|
case ARM_STCL_POST:
|
||
|
|
imm |= U << 8;
|
||
|
|
// fall through.
|
||
|
|
default:
|
||
|
|
// The 'option' variant doesn't encode 'U' in the immediate since
|
||
|
|
// the immediate is unsigned [0,255].
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_LDC_OFFSET:
|
||
|
|
case ARM_LDC_PRE:
|
||
|
|
case ARM_LDC_POST:
|
||
|
|
case ARM_LDC_OPTION:
|
||
|
|
case ARM_LDCL_OFFSET:
|
||
|
|
case ARM_LDCL_PRE:
|
||
|
|
case ARM_LDCL_POST:
|
||
|
|
case ARM_LDCL_OPTION:
|
||
|
|
case ARM_STC_OFFSET:
|
||
|
|
case ARM_STC_PRE:
|
||
|
|
case ARM_STC_POST:
|
||
|
|
case ARM_STC_OPTION:
|
||
|
|
case ARM_STCL_OFFSET:
|
||
|
|
case ARM_STCL_PRE:
|
||
|
|
case ARM_STCL_POST:
|
||
|
|
case ARM_STCL_OPTION:
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeAddrMode2IdxInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned reg = fieldFromInstruction_4(Insn, 25, 1);
|
||
|
|
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
|
||
|
|
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
|
||
|
|
// On stores, the writeback operand precedes Rt.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_STR_POST_IMM:
|
||
|
|
case ARM_STR_POST_REG:
|
||
|
|
case ARM_STRB_POST_IMM:
|
||
|
|
case ARM_STRB_POST_REG:
|
||
|
|
case ARM_STRT_POST_REG:
|
||
|
|
case ARM_STRT_POST_IMM:
|
||
|
|
case ARM_STRBT_POST_REG:
|
||
|
|
case ARM_STRBT_POST_IMM:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
// On loads, the writeback operand comes after Rt.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_LDR_POST_IMM:
|
||
|
|
case ARM_LDR_POST_REG:
|
||
|
|
case ARM_LDRB_POST_IMM:
|
||
|
|
case ARM_LDRB_POST_REG:
|
||
|
|
case ARM_LDRBT_POST_REG:
|
||
|
|
case ARM_LDRBT_POST_IMM:
|
||
|
|
case ARM_LDRT_POST_REG:
|
||
|
|
case ARM_LDRT_POST_IMM:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
ARM_AM_AddrOpc Op = ARM_AM_add;
|
||
|
|
if (!fieldFromInstruction_4(Insn, 23, 1))
|
||
|
|
Op = ARM_AM_sub;
|
||
|
|
|
||
|
|
bool writeback = (P == 0) || (W == 1);
|
||
|
|
unsigned idx_mode = 0;
|
||
|
|
if (P && writeback)
|
||
|
|
idx_mode = ARMII_IndexModePre;
|
||
|
|
else if (!P && writeback)
|
||
|
|
idx_mode = ARMII_IndexModePost;
|
||
|
|
|
||
|
|
if (writeback && (Rn == 15 || Rn == Rt))
|
||
|
|
S = MCDisassembler_SoftFail; // UNPREDICTABLE
|
||
|
|
|
||
|
|
if (reg) {
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
ARM_AM_ShiftOpc Opc = ARM_AM_lsl;
|
||
|
|
switch( fieldFromInstruction_4(Insn, 5, 2)) {
|
||
|
|
case 0:
|
||
|
|
Opc = ARM_AM_lsl;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
Opc = ARM_AM_lsr;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
Opc = ARM_AM_asr;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
Opc = ARM_AM_ror;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
unsigned amt = fieldFromInstruction_4(Insn, 7, 5);
|
||
|
|
if (Opc == ARM_AM_ror && amt == 0)
|
||
|
|
Opc = ARM_AM_rrx;
|
||
|
|
unsigned imm = ARM_AM_getAM2Opc(Op, amt, Opc, idx_mode);
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
} else {
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
unsigned tmp = ARM_AM_getAM2Opc(Op, imm, ARM_AM_lsl, idx_mode);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(tmp));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSORegMemOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 13, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
|
||
|
|
unsigned type = fieldFromInstruction_4(Val, 5, 2);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 7, 5);
|
||
|
|
unsigned U = fieldFromInstruction_4(Val, 12, 1);
|
||
|
|
|
||
|
|
ARM_AM_ShiftOpc ShOp = ARM_AM_lsl;
|
||
|
|
switch (type) {
|
||
|
|
case 0:
|
||
|
|
ShOp = ARM_AM_lsl;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
ShOp = ARM_AM_lsr;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
ShOp = ARM_AM_asr;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
ShOp = ARM_AM_ror;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ShOp == ARM_AM_ror && imm == 0)
|
||
|
|
ShOp = ARM_AM_rrx;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
unsigned shift;
|
||
|
|
if (U)
|
||
|
|
shift = ARM_AM_getAM2Opc(ARM_AM_add, imm, ShOp, 0);
|
||
|
|
else
|
||
|
|
shift = ARM_AM_getAM2Opc(ARM_AM_sub, imm, ShOp, 0);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(shift));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeAddrMode3Instruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned type = fieldFromInstruction_4(Insn, 22, 1);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned U = ((~fieldFromInstruction_4(Insn, 23, 1)) & 1) << 8;
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
|
||
|
|
unsigned Rt2 = Rt + 1;
|
||
|
|
|
||
|
|
bool writeback = (W == 1) | (P == 0);
|
||
|
|
|
||
|
|
// For {LD,ST}RD, Rt must be even, else undefined.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_STRD:
|
||
|
|
case ARM_STRD_PRE:
|
||
|
|
case ARM_STRD_POST:
|
||
|
|
case ARM_LDRD:
|
||
|
|
case ARM_LDRD_PRE:
|
||
|
|
case ARM_LDRD_POST:
|
||
|
|
if (Rt & 0x1) S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_STRD:
|
||
|
|
case ARM_STRD_PRE:
|
||
|
|
case ARM_STRD_POST:
|
||
|
|
if (P == 0 && W == 1)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (writeback && (Rn == 15 || Rn == Rt || Rn == Rt2))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (type && Rm == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (Rt2 == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && fieldFromInstruction_4(Insn, 8, 4))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
case ARM_STRH:
|
||
|
|
case ARM_STRH_PRE:
|
||
|
|
case ARM_STRH_POST:
|
||
|
|
if (Rt == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (writeback && (Rn == 15 || Rn == Rt))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && Rm == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
case ARM_LDRD:
|
||
|
|
case ARM_LDRD_PRE:
|
||
|
|
case ARM_LDRD_POST:
|
||
|
|
if (type && Rn == 15){
|
||
|
|
if (Rt2 == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (P == 0 && W == 1)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && (Rt2 == 15 || Rm == 15 || Rm == Rt || Rm == Rt2))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && writeback && Rn == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (writeback && (Rn == Rt || Rn == Rt2))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
case ARM_LDRH:
|
||
|
|
case ARM_LDRH_PRE:
|
||
|
|
case ARM_LDRH_POST:
|
||
|
|
if (type && Rn == 15){
|
||
|
|
if (Rt == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (Rt == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && Rm == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && writeback && (Rn == 15 || Rn == Rt))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
case ARM_LDRSH:
|
||
|
|
case ARM_LDRSH_PRE:
|
||
|
|
case ARM_LDRSH_POST:
|
||
|
|
case ARM_LDRSB:
|
||
|
|
case ARM_LDRSB_PRE:
|
||
|
|
case ARM_LDRSB_POST:
|
||
|
|
if (type && Rn == 15){
|
||
|
|
if (Rt == 15)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (type && (Rt == 15 || (writeback && Rn == Rt)))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && (Rt == 15 || Rm == 15))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
if (!type && writeback && (Rn == 15 || Rn == Rt))
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (writeback) { // Writeback
|
||
|
|
if (P)
|
||
|
|
U |= ARMII_IndexModePre << 9;
|
||
|
|
else
|
||
|
|
U |= ARMII_IndexModePost << 9;
|
||
|
|
|
||
|
|
// On stores, the writeback operand precedes Rt.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_STRD:
|
||
|
|
case ARM_STRD_PRE:
|
||
|
|
case ARM_STRD_POST:
|
||
|
|
case ARM_STRH:
|
||
|
|
case ARM_STRH_PRE:
|
||
|
|
case ARM_STRH_POST:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_STRD:
|
||
|
|
case ARM_STRD_PRE:
|
||
|
|
case ARM_STRD_POST:
|
||
|
|
case ARM_LDRD:
|
||
|
|
case ARM_LDRD_PRE:
|
||
|
|
case ARM_LDRD_POST:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt+1, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (writeback) {
|
||
|
|
// On loads, the writeback operand comes after Rt.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_LDRD:
|
||
|
|
case ARM_LDRD_PRE:
|
||
|
|
case ARM_LDRD_POST:
|
||
|
|
case ARM_LDRH:
|
||
|
|
case ARM_LDRH_PRE:
|
||
|
|
case ARM_LDRH_POST:
|
||
|
|
case ARM_LDRSH:
|
||
|
|
case ARM_LDRSH_PRE:
|
||
|
|
case ARM_LDRSH_POST:
|
||
|
|
case ARM_LDRSB:
|
||
|
|
case ARM_LDRSB_PRE:
|
||
|
|
case ARM_LDRSB_POST:
|
||
|
|
case ARM_LDRHTr:
|
||
|
|
case ARM_LDRSBTr:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (type) {
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(U | (imm << 4) | Rm));
|
||
|
|
} else {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(U));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeRFEInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned mode = fieldFromInstruction_4(Insn, 23, 2);
|
||
|
|
|
||
|
|
switch (mode) {
|
||
|
|
case 0:
|
||
|
|
mode = ARM_AM_da;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
mode = ARM_AM_ia;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
mode = ARM_AM_db;
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
mode = ARM_AM_ib;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mode));
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeQADDInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (pred == 0xF)
|
||
|
|
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeMemMultipleWritebackInstruction(MCInst *Inst,
|
||
|
|
unsigned Insn, uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned reglist = fieldFromInstruction_4(Insn, 0, 16);
|
||
|
|
|
||
|
|
if (pred == 0xF) {
|
||
|
|
// Ambiguous with RFE and SRS
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_LDMDA:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEDA);
|
||
|
|
break;
|
||
|
|
case ARM_LDMDA_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEDA_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_LDMDB:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEDB);
|
||
|
|
break;
|
||
|
|
case ARM_LDMDB_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEDB_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_LDMIA:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEIA);
|
||
|
|
break;
|
||
|
|
case ARM_LDMIA_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEIA_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_LDMIB:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEIB);
|
||
|
|
break;
|
||
|
|
case ARM_LDMIB_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_RFEIB_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_STMDA:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSDA);
|
||
|
|
break;
|
||
|
|
case ARM_STMDA_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSDA_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_STMDB:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSDB);
|
||
|
|
break;
|
||
|
|
case ARM_STMDB_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSDB_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_STMIA:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSIA);
|
||
|
|
break;
|
||
|
|
case ARM_STMIA_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSIA_UPD);
|
||
|
|
break;
|
||
|
|
case ARM_STMIB:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSIB);
|
||
|
|
break;
|
||
|
|
case ARM_STMIB_UPD:
|
||
|
|
MCInst_setOpcode(Inst, ARM_SRSIB_UPD);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
// For stores (which become SRS's, the only operand is the mode.
|
||
|
|
if (fieldFromInstruction_4(Insn, 20, 1) == 0) {
|
||
|
|
// Check SRS encoding constraints
|
||
|
|
if (!(fieldFromInstruction_4(Insn, 22, 1) == 1 &&
|
||
|
|
fieldFromInstruction_4(Insn, 20, 1) == 0))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst,
|
||
|
|
MCOperand_CreateImm(fieldFromInstruction_4(Insn, 0, 4)));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
return DecodeRFEInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail; // Tied
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeRegListOperand(Inst, reglist, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeCPSInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned imod = fieldFromInstruction_4(Insn, 18, 2);
|
||
|
|
unsigned M = fieldFromInstruction_4(Insn, 17, 1);
|
||
|
|
unsigned iflags = fieldFromInstruction_4(Insn, 6, 3);
|
||
|
|
unsigned mode = fieldFromInstruction_4(Insn, 0, 5);
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// This decoder is called from multiple location that do not check
|
||
|
|
// the full encoding is valid before they do.
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1) != 0 ||
|
||
|
|
fieldFromInstruction_4(Insn, 16, 1) != 0 ||
|
||
|
|
fieldFromInstruction_4(Insn, 20, 8) != 0x10)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
// imod == '01' --> UNPREDICTABLE
|
||
|
|
// NOTE: Even though this is technically UNPREDICTABLE, we choose to
|
||
|
|
// return failure here. The '01' imod value is unprintable, so there's
|
||
|
|
// nothing useful we could do even if we returned UNPREDICTABLE.
|
||
|
|
|
||
|
|
if (imod == 1) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (imod && M) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_CPS3p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imod));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(iflags));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mode));
|
||
|
|
} else if (imod && !M) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_CPS2p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imod));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(iflags));
|
||
|
|
if (mode) S = MCDisassembler_SoftFail;
|
||
|
|
} else if (!imod && M) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_CPS1p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mode));
|
||
|
|
if (iflags) S = MCDisassembler_SoftFail;
|
||
|
|
} else {
|
||
|
|
// imod == '00' && M == '0' --> UNPREDICTABLE
|
||
|
|
MCInst_setOpcode(Inst, ARM_CPS1p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mode));
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2CPSInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned imod = fieldFromInstruction_4(Insn, 9, 2);
|
||
|
|
unsigned M = fieldFromInstruction_4(Insn, 8, 1);
|
||
|
|
unsigned iflags = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
unsigned mode = fieldFromInstruction_4(Insn, 0, 5);
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// imod == '01' --> UNPREDICTABLE
|
||
|
|
// NOTE: Even though this is technically UNPREDICTABLE, we choose to
|
||
|
|
// return failure here. The '01' imod value is unprintable, so there's
|
||
|
|
// nothing useful we could do even if we returned UNPREDICTABLE.
|
||
|
|
|
||
|
|
if (imod == 1) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (imod && M) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2CPS3p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imod));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(iflags));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mode));
|
||
|
|
} else if (imod && !M) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2CPS2p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imod));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(iflags));
|
||
|
|
if (mode) S = MCDisassembler_SoftFail;
|
||
|
|
} else if (!imod && M) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2CPS1p);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mode));
|
||
|
|
if (iflags) S = MCDisassembler_SoftFail;
|
||
|
|
} else {
|
||
|
|
// imod == '00' && M == '0' --> this is a HINT instruction
|
||
|
|
int imm = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
// HINT are defined only for immediate in [0..4]
|
||
|
|
if(imm > 4) return MCDisassembler_Fail;
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2HINT);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2MOVTWInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned imm = 0;
|
||
|
|
|
||
|
|
imm |= (fieldFromInstruction_4(Insn, 0, 8) << 0);
|
||
|
|
imm |= (fieldFromInstruction_4(Insn, 12, 3) << 8);
|
||
|
|
imm |= (fieldFromInstruction_4(Insn, 16, 4) << 12);
|
||
|
|
imm |= (fieldFromInstruction_4(Insn, 26, 1) << 11);
|
||
|
|
|
||
|
|
if (MCInst_getOpcode(Inst) == ARM_t2MOVTi16)
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeArmMOVTWInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned imm = 0;
|
||
|
|
|
||
|
|
imm |= (fieldFromInstruction_4(Insn, 0, 12) << 0);
|
||
|
|
imm |= (fieldFromInstruction_4(Insn, 16, 4) << 12);
|
||
|
|
|
||
|
|
if (MCInst_getOpcode(Inst) == ARM_MOVTi16)
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSMLAInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned Ra = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (pred == 0xF)
|
||
|
|
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Ra, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeAddrModeImm12Operand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned add = fieldFromInstruction_4(Val, 12, 1);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 12);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 13, 4);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (!add) imm *= -1;
|
||
|
|
if (imm == 0 && !add) imm = INT32_MIN;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
//if (Rn == 15)
|
||
|
|
// tryAddingPcLoadReferenceComment(Address, Address + imm + 8, Decoder);
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeAddrMode5Operand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
|
||
|
|
unsigned U = fieldFromInstruction_4(Val, 8, 1);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (U)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(ARM_AM_getAM5Opc(ARM_AM_add, imm)));
|
||
|
|
else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(ARM_AM_getAM5Opc(ARM_AM_sub, imm)));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeAddrMode7Operand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
return DecodeGPRRegisterClass(Inst, Val, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2BInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus Status = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// Note the J1 and J2 values are from the encoded instruction. So here
|
||
|
|
// change them to I1 and I2 values via as documented:
|
||
|
|
// I1 = NOT(J1 EOR S);
|
||
|
|
// I2 = NOT(J2 EOR S);
|
||
|
|
// and build the imm32 with one trailing zero as documented:
|
||
|
|
// imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
|
||
|
|
unsigned S = fieldFromInstruction_4(Insn, 26, 1);
|
||
|
|
unsigned J1 = fieldFromInstruction_4(Insn, 13, 1);
|
||
|
|
unsigned J2 = fieldFromInstruction_4(Insn, 11, 1);
|
||
|
|
unsigned I1 = !(J1 ^ S);
|
||
|
|
unsigned I2 = !(J2 ^ S);
|
||
|
|
unsigned imm10 = fieldFromInstruction_4(Insn, 16, 10);
|
||
|
|
unsigned imm11 = fieldFromInstruction_4(Insn, 0, 11);
|
||
|
|
unsigned tmp = (S << 23) | (I1 << 22) | (I2 << 21) | (imm10 << 11) | imm11;
|
||
|
|
int imm32 = SignExtend32(tmp << 1, 25);
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm32));
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeBranchImmInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 24) << 2;
|
||
|
|
|
||
|
|
if (pred == 0xF) {
|
||
|
|
MCInst_setOpcode(Inst, ARM_BLXi);
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 24, 1) << 1;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(SignExtend32(imm, 26)));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(SignExtend32(imm, 26)));
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static DecodeStatus DecodeAddrMode6Operand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
|
||
|
|
unsigned align = fieldFromInstruction_4(Val, 4, 2);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!align)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(0));
|
||
|
|
else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(4 << align));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLDInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned wb = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
Rn |= fieldFromInstruction_4(Insn, 4, 2) << 4;
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
|
||
|
|
// First output register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD1q16: case ARM_VLD1q32: case ARM_VLD1q64: case ARM_VLD1q8:
|
||
|
|
case ARM_VLD1q16wb_fixed: case ARM_VLD1q16wb_register:
|
||
|
|
case ARM_VLD1q32wb_fixed: case ARM_VLD1q32wb_register:
|
||
|
|
case ARM_VLD1q64wb_fixed: case ARM_VLD1q64wb_register:
|
||
|
|
case ARM_VLD1q8wb_fixed: case ARM_VLD1q8wb_register:
|
||
|
|
case ARM_VLD2d16: case ARM_VLD2d32: case ARM_VLD2d8:
|
||
|
|
case ARM_VLD2d16wb_fixed: case ARM_VLD2d16wb_register:
|
||
|
|
case ARM_VLD2d32wb_fixed: case ARM_VLD2d32wb_register:
|
||
|
|
case ARM_VLD2d8wb_fixed: case ARM_VLD2d8wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VLD2b16:
|
||
|
|
case ARM_VLD2b32:
|
||
|
|
case ARM_VLD2b8:
|
||
|
|
case ARM_VLD2b16wb_fixed:
|
||
|
|
case ARM_VLD2b16wb_register:
|
||
|
|
case ARM_VLD2b32wb_fixed:
|
||
|
|
case ARM_VLD2b32wb_register:
|
||
|
|
case ARM_VLD2b8wb_fixed:
|
||
|
|
case ARM_VLD2b8wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Second output register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD3d8:
|
||
|
|
case ARM_VLD3d16:
|
||
|
|
case ARM_VLD3d32:
|
||
|
|
case ARM_VLD3d8_UPD:
|
||
|
|
case ARM_VLD3d16_UPD:
|
||
|
|
case ARM_VLD3d32_UPD:
|
||
|
|
case ARM_VLD4d8:
|
||
|
|
case ARM_VLD4d16:
|
||
|
|
case ARM_VLD4d32:
|
||
|
|
case ARM_VLD4d8_UPD:
|
||
|
|
case ARM_VLD4d16_UPD:
|
||
|
|
case ARM_VLD4d32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VLD3q8:
|
||
|
|
case ARM_VLD3q16:
|
||
|
|
case ARM_VLD3q32:
|
||
|
|
case ARM_VLD3q8_UPD:
|
||
|
|
case ARM_VLD3q16_UPD:
|
||
|
|
case ARM_VLD3q32_UPD:
|
||
|
|
case ARM_VLD4q8:
|
||
|
|
case ARM_VLD4q16:
|
||
|
|
case ARM_VLD4q32:
|
||
|
|
case ARM_VLD4q8_UPD:
|
||
|
|
case ARM_VLD4q16_UPD:
|
||
|
|
case ARM_VLD4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Third output register
|
||
|
|
switch(MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD3d8:
|
||
|
|
case ARM_VLD3d16:
|
||
|
|
case ARM_VLD3d32:
|
||
|
|
case ARM_VLD3d8_UPD:
|
||
|
|
case ARM_VLD3d16_UPD:
|
||
|
|
case ARM_VLD3d32_UPD:
|
||
|
|
case ARM_VLD4d8:
|
||
|
|
case ARM_VLD4d16:
|
||
|
|
case ARM_VLD4d32:
|
||
|
|
case ARM_VLD4d8_UPD:
|
||
|
|
case ARM_VLD4d16_UPD:
|
||
|
|
case ARM_VLD4d32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VLD3q8:
|
||
|
|
case ARM_VLD3q16:
|
||
|
|
case ARM_VLD3q32:
|
||
|
|
case ARM_VLD3q8_UPD:
|
||
|
|
case ARM_VLD3q16_UPD:
|
||
|
|
case ARM_VLD3q32_UPD:
|
||
|
|
case ARM_VLD4q8:
|
||
|
|
case ARM_VLD4q16:
|
||
|
|
case ARM_VLD4q32:
|
||
|
|
case ARM_VLD4q8_UPD:
|
||
|
|
case ARM_VLD4q16_UPD:
|
||
|
|
case ARM_VLD4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Fourth output register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD4d8:
|
||
|
|
case ARM_VLD4d16:
|
||
|
|
case ARM_VLD4d32:
|
||
|
|
case ARM_VLD4d8_UPD:
|
||
|
|
case ARM_VLD4d16_UPD:
|
||
|
|
case ARM_VLD4d32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VLD4q8:
|
||
|
|
case ARM_VLD4q16:
|
||
|
|
case ARM_VLD4q32:
|
||
|
|
case ARM_VLD4q8_UPD:
|
||
|
|
case ARM_VLD4q16_UPD:
|
||
|
|
case ARM_VLD4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Writeback operand
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD1d8wb_fixed:
|
||
|
|
case ARM_VLD1d16wb_fixed:
|
||
|
|
case ARM_VLD1d32wb_fixed:
|
||
|
|
case ARM_VLD1d64wb_fixed:
|
||
|
|
case ARM_VLD1d8wb_register:
|
||
|
|
case ARM_VLD1d16wb_register:
|
||
|
|
case ARM_VLD1d32wb_register:
|
||
|
|
case ARM_VLD1d64wb_register:
|
||
|
|
case ARM_VLD1q8wb_fixed:
|
||
|
|
case ARM_VLD1q16wb_fixed:
|
||
|
|
case ARM_VLD1q32wb_fixed:
|
||
|
|
case ARM_VLD1q64wb_fixed:
|
||
|
|
case ARM_VLD1q8wb_register:
|
||
|
|
case ARM_VLD1q16wb_register:
|
||
|
|
case ARM_VLD1q32wb_register:
|
||
|
|
case ARM_VLD1q64wb_register:
|
||
|
|
case ARM_VLD1d8Twb_fixed:
|
||
|
|
case ARM_VLD1d8Twb_register:
|
||
|
|
case ARM_VLD1d16Twb_fixed:
|
||
|
|
case ARM_VLD1d16Twb_register:
|
||
|
|
case ARM_VLD1d32Twb_fixed:
|
||
|
|
case ARM_VLD1d32Twb_register:
|
||
|
|
case ARM_VLD1d64Twb_fixed:
|
||
|
|
case ARM_VLD1d64Twb_register:
|
||
|
|
case ARM_VLD1d8Qwb_fixed:
|
||
|
|
case ARM_VLD1d8Qwb_register:
|
||
|
|
case ARM_VLD1d16Qwb_fixed:
|
||
|
|
case ARM_VLD1d16Qwb_register:
|
||
|
|
case ARM_VLD1d32Qwb_fixed:
|
||
|
|
case ARM_VLD1d32Qwb_register:
|
||
|
|
case ARM_VLD1d64Qwb_fixed:
|
||
|
|
case ARM_VLD1d64Qwb_register:
|
||
|
|
case ARM_VLD2d8wb_fixed:
|
||
|
|
case ARM_VLD2d16wb_fixed:
|
||
|
|
case ARM_VLD2d32wb_fixed:
|
||
|
|
case ARM_VLD2q8wb_fixed:
|
||
|
|
case ARM_VLD2q16wb_fixed:
|
||
|
|
case ARM_VLD2q32wb_fixed:
|
||
|
|
case ARM_VLD2d8wb_register:
|
||
|
|
case ARM_VLD2d16wb_register:
|
||
|
|
case ARM_VLD2d32wb_register:
|
||
|
|
case ARM_VLD2q8wb_register:
|
||
|
|
case ARM_VLD2q16wb_register:
|
||
|
|
case ARM_VLD2q32wb_register:
|
||
|
|
case ARM_VLD2b8wb_fixed:
|
||
|
|
case ARM_VLD2b16wb_fixed:
|
||
|
|
case ARM_VLD2b32wb_fixed:
|
||
|
|
case ARM_VLD2b8wb_register:
|
||
|
|
case ARM_VLD2b16wb_register:
|
||
|
|
case ARM_VLD2b32wb_register:
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(0));
|
||
|
|
break;
|
||
|
|
case ARM_VLD3d8_UPD:
|
||
|
|
case ARM_VLD3d16_UPD:
|
||
|
|
case ARM_VLD3d32_UPD:
|
||
|
|
case ARM_VLD3q8_UPD:
|
||
|
|
case ARM_VLD3q16_UPD:
|
||
|
|
case ARM_VLD3q32_UPD:
|
||
|
|
case ARM_VLD4d8_UPD:
|
||
|
|
case ARM_VLD4d16_UPD:
|
||
|
|
case ARM_VLD4d32_UPD:
|
||
|
|
case ARM_VLD4q8_UPD:
|
||
|
|
case ARM_VLD4q16_UPD:
|
||
|
|
case ARM_VLD4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// AddrMode6 Base (register+alignment)
|
||
|
|
if (!Check(&S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
// AddrMode6 Offset (register)
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
default:
|
||
|
|
// The below have been updated to have explicit am6offset split
|
||
|
|
// between fixed and register offset. For those instructions not
|
||
|
|
// yet updated, we need to add an additional reg0 operand for the
|
||
|
|
// fixed variant.
|
||
|
|
//
|
||
|
|
// The fixed offset encodes as Rm == 0xd, so we check for that.
|
||
|
|
if (Rm == 0xd) {
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
// Fall through to handle the register offset variant.
|
||
|
|
case ARM_VLD1d8wb_fixed:
|
||
|
|
case ARM_VLD1d16wb_fixed:
|
||
|
|
case ARM_VLD1d32wb_fixed:
|
||
|
|
case ARM_VLD1d64wb_fixed:
|
||
|
|
case ARM_VLD1d8Twb_fixed:
|
||
|
|
case ARM_VLD1d16Twb_fixed:
|
||
|
|
case ARM_VLD1d32Twb_fixed:
|
||
|
|
case ARM_VLD1d64Twb_fixed:
|
||
|
|
case ARM_VLD1d8Qwb_fixed:
|
||
|
|
case ARM_VLD1d16Qwb_fixed:
|
||
|
|
case ARM_VLD1d32Qwb_fixed:
|
||
|
|
case ARM_VLD1d64Qwb_fixed:
|
||
|
|
case ARM_VLD1d8wb_register:
|
||
|
|
case ARM_VLD1d16wb_register:
|
||
|
|
case ARM_VLD1d32wb_register:
|
||
|
|
case ARM_VLD1d64wb_register:
|
||
|
|
case ARM_VLD1q8wb_fixed:
|
||
|
|
case ARM_VLD1q16wb_fixed:
|
||
|
|
case ARM_VLD1q32wb_fixed:
|
||
|
|
case ARM_VLD1q64wb_fixed:
|
||
|
|
case ARM_VLD1q8wb_register:
|
||
|
|
case ARM_VLD1q16wb_register:
|
||
|
|
case ARM_VLD1q32wb_register:
|
||
|
|
case ARM_VLD1q64wb_register:
|
||
|
|
// The fixed offset post-increment encodes Rm == 0xd. The no-writeback
|
||
|
|
// variant encodes Rm == 0xf. Anything else is a register offset post-
|
||
|
|
// increment and we need to add the register operand to the instruction.
|
||
|
|
if (Rm != 0xD && Rm != 0xF &&
|
||
|
|
!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VLD2d8wb_fixed:
|
||
|
|
case ARM_VLD2d16wb_fixed:
|
||
|
|
case ARM_VLD2d32wb_fixed:
|
||
|
|
case ARM_VLD2b8wb_fixed:
|
||
|
|
case ARM_VLD2b16wb_fixed:
|
||
|
|
case ARM_VLD2b32wb_fixed:
|
||
|
|
case ARM_VLD2q8wb_fixed:
|
||
|
|
case ARM_VLD2q16wb_fixed:
|
||
|
|
case ARM_VLD2q32wb_fixed:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLDST1Instruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned type = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned align = fieldFromInstruction_4(Insn, 4, 2);
|
||
|
|
if (type == 6 && (align & 2)) return MCDisassembler_Fail;
|
||
|
|
if (type == 7 && (align & 2)) return MCDisassembler_Fail;
|
||
|
|
if (type == 10 && align == 3) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
|
||
|
|
: DecodeVSTInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLDST2Instruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (size == 3) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned type = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned align = fieldFromInstruction_4(Insn, 4, 2);
|
||
|
|
if (type == 8 && align == 3) return MCDisassembler_Fail;
|
||
|
|
if (type == 9 && align == 3) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
|
||
|
|
: DecodeVSTInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLDST3Instruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (size == 3) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned align = fieldFromInstruction_4(Insn, 4, 2);
|
||
|
|
if (align & 2) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
|
||
|
|
: DecodeVSTInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLDST4Instruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (size == 3) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned load = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
return load ? DecodeVLDInstruction(Inst, Insn, Address, Decoder)
|
||
|
|
: DecodeVSTInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVSTInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned wb = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
Rn |= fieldFromInstruction_4(Insn, 4, 2) << 4;
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
|
||
|
|
// Writeback Operand
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VST1d8wb_fixed:
|
||
|
|
case ARM_VST1d16wb_fixed:
|
||
|
|
case ARM_VST1d32wb_fixed:
|
||
|
|
case ARM_VST1d64wb_fixed:
|
||
|
|
case ARM_VST1d8wb_register:
|
||
|
|
case ARM_VST1d16wb_register:
|
||
|
|
case ARM_VST1d32wb_register:
|
||
|
|
case ARM_VST1d64wb_register:
|
||
|
|
case ARM_VST1q8wb_fixed:
|
||
|
|
case ARM_VST1q16wb_fixed:
|
||
|
|
case ARM_VST1q32wb_fixed:
|
||
|
|
case ARM_VST1q64wb_fixed:
|
||
|
|
case ARM_VST1q8wb_register:
|
||
|
|
case ARM_VST1q16wb_register:
|
||
|
|
case ARM_VST1q32wb_register:
|
||
|
|
case ARM_VST1q64wb_register:
|
||
|
|
case ARM_VST1d8Twb_fixed:
|
||
|
|
case ARM_VST1d16Twb_fixed:
|
||
|
|
case ARM_VST1d32Twb_fixed:
|
||
|
|
case ARM_VST1d64Twb_fixed:
|
||
|
|
case ARM_VST1d8Twb_register:
|
||
|
|
case ARM_VST1d16Twb_register:
|
||
|
|
case ARM_VST1d32Twb_register:
|
||
|
|
case ARM_VST1d64Twb_register:
|
||
|
|
case ARM_VST1d8Qwb_fixed:
|
||
|
|
case ARM_VST1d16Qwb_fixed:
|
||
|
|
case ARM_VST1d32Qwb_fixed:
|
||
|
|
case ARM_VST1d64Qwb_fixed:
|
||
|
|
case ARM_VST1d8Qwb_register:
|
||
|
|
case ARM_VST1d16Qwb_register:
|
||
|
|
case ARM_VST1d32Qwb_register:
|
||
|
|
case ARM_VST1d64Qwb_register:
|
||
|
|
case ARM_VST2d8wb_fixed:
|
||
|
|
case ARM_VST2d16wb_fixed:
|
||
|
|
case ARM_VST2d32wb_fixed:
|
||
|
|
case ARM_VST2d8wb_register:
|
||
|
|
case ARM_VST2d16wb_register:
|
||
|
|
case ARM_VST2d32wb_register:
|
||
|
|
case ARM_VST2q8wb_fixed:
|
||
|
|
case ARM_VST2q16wb_fixed:
|
||
|
|
case ARM_VST2q32wb_fixed:
|
||
|
|
case ARM_VST2q8wb_register:
|
||
|
|
case ARM_VST2q16wb_register:
|
||
|
|
case ARM_VST2q32wb_register:
|
||
|
|
case ARM_VST2b8wb_fixed:
|
||
|
|
case ARM_VST2b16wb_fixed:
|
||
|
|
case ARM_VST2b32wb_fixed:
|
||
|
|
case ARM_VST2b8wb_register:
|
||
|
|
case ARM_VST2b16wb_register:
|
||
|
|
case ARM_VST2b32wb_register:
|
||
|
|
if (Rm == 0xF)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(0));
|
||
|
|
break;
|
||
|
|
case ARM_VST3d8_UPD:
|
||
|
|
case ARM_VST3d16_UPD:
|
||
|
|
case ARM_VST3d32_UPD:
|
||
|
|
case ARM_VST3q8_UPD:
|
||
|
|
case ARM_VST3q16_UPD:
|
||
|
|
case ARM_VST3q32_UPD:
|
||
|
|
case ARM_VST4d8_UPD:
|
||
|
|
case ARM_VST4d16_UPD:
|
||
|
|
case ARM_VST4d32_UPD:
|
||
|
|
case ARM_VST4q8_UPD:
|
||
|
|
case ARM_VST4q16_UPD:
|
||
|
|
case ARM_VST4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, wb, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// AddrMode6 Base (register+alignment)
|
||
|
|
if (!Check(&S, DecodeAddrMode6Operand(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
// AddrMode6 Offset (register)
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
default:
|
||
|
|
if (Rm == 0xD)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
else if (Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case ARM_VST1d8wb_fixed:
|
||
|
|
case ARM_VST1d16wb_fixed:
|
||
|
|
case ARM_VST1d32wb_fixed:
|
||
|
|
case ARM_VST1d64wb_fixed:
|
||
|
|
case ARM_VST1q8wb_fixed:
|
||
|
|
case ARM_VST1q16wb_fixed:
|
||
|
|
case ARM_VST1q32wb_fixed:
|
||
|
|
case ARM_VST1q64wb_fixed:
|
||
|
|
case ARM_VST1d8Twb_fixed:
|
||
|
|
case ARM_VST1d16Twb_fixed:
|
||
|
|
case ARM_VST1d32Twb_fixed:
|
||
|
|
case ARM_VST1d64Twb_fixed:
|
||
|
|
case ARM_VST1d8Qwb_fixed:
|
||
|
|
case ARM_VST1d16Qwb_fixed:
|
||
|
|
case ARM_VST1d32Qwb_fixed:
|
||
|
|
case ARM_VST1d64Qwb_fixed:
|
||
|
|
case ARM_VST2d8wb_fixed:
|
||
|
|
case ARM_VST2d16wb_fixed:
|
||
|
|
case ARM_VST2d32wb_fixed:
|
||
|
|
case ARM_VST2q8wb_fixed:
|
||
|
|
case ARM_VST2q16wb_fixed:
|
||
|
|
case ARM_VST2q32wb_fixed:
|
||
|
|
case ARM_VST2b8wb_fixed:
|
||
|
|
case ARM_VST2b16wb_fixed:
|
||
|
|
case ARM_VST2b32wb_fixed:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// First input register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VST1q16:
|
||
|
|
case ARM_VST1q32:
|
||
|
|
case ARM_VST1q64:
|
||
|
|
case ARM_VST1q8:
|
||
|
|
case ARM_VST1q16wb_fixed:
|
||
|
|
case ARM_VST1q16wb_register:
|
||
|
|
case ARM_VST1q32wb_fixed:
|
||
|
|
case ARM_VST1q32wb_register:
|
||
|
|
case ARM_VST1q64wb_fixed:
|
||
|
|
case ARM_VST1q64wb_register:
|
||
|
|
case ARM_VST1q8wb_fixed:
|
||
|
|
case ARM_VST1q8wb_register:
|
||
|
|
case ARM_VST2d16:
|
||
|
|
case ARM_VST2d32:
|
||
|
|
case ARM_VST2d8:
|
||
|
|
case ARM_VST2d16wb_fixed:
|
||
|
|
case ARM_VST2d16wb_register:
|
||
|
|
case ARM_VST2d32wb_fixed:
|
||
|
|
case ARM_VST2d32wb_register:
|
||
|
|
case ARM_VST2d8wb_fixed:
|
||
|
|
case ARM_VST2d8wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VST2b16:
|
||
|
|
case ARM_VST2b32:
|
||
|
|
case ARM_VST2b8:
|
||
|
|
case ARM_VST2b16wb_fixed:
|
||
|
|
case ARM_VST2b16wb_register:
|
||
|
|
case ARM_VST2b32wb_fixed:
|
||
|
|
case ARM_VST2b32wb_register:
|
||
|
|
case ARM_VST2b8wb_fixed:
|
||
|
|
case ARM_VST2b8wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Second input register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VST3d8:
|
||
|
|
case ARM_VST3d16:
|
||
|
|
case ARM_VST3d32:
|
||
|
|
case ARM_VST3d8_UPD:
|
||
|
|
case ARM_VST3d16_UPD:
|
||
|
|
case ARM_VST3d32_UPD:
|
||
|
|
case ARM_VST4d8:
|
||
|
|
case ARM_VST4d16:
|
||
|
|
case ARM_VST4d32:
|
||
|
|
case ARM_VST4d8_UPD:
|
||
|
|
case ARM_VST4d16_UPD:
|
||
|
|
case ARM_VST4d32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+1)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VST3q8:
|
||
|
|
case ARM_VST3q16:
|
||
|
|
case ARM_VST3q32:
|
||
|
|
case ARM_VST3q8_UPD:
|
||
|
|
case ARM_VST3q16_UPD:
|
||
|
|
case ARM_VST3q32_UPD:
|
||
|
|
case ARM_VST4q8:
|
||
|
|
case ARM_VST4q16:
|
||
|
|
case ARM_VST4q32:
|
||
|
|
case ARM_VST4q8_UPD:
|
||
|
|
case ARM_VST4q16_UPD:
|
||
|
|
case ARM_VST4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Third input register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VST3d8:
|
||
|
|
case ARM_VST3d16:
|
||
|
|
case ARM_VST3d32:
|
||
|
|
case ARM_VST3d8_UPD:
|
||
|
|
case ARM_VST3d16_UPD:
|
||
|
|
case ARM_VST3d32_UPD:
|
||
|
|
case ARM_VST4d8:
|
||
|
|
case ARM_VST4d16:
|
||
|
|
case ARM_VST4d32:
|
||
|
|
case ARM_VST4d8_UPD:
|
||
|
|
case ARM_VST4d16_UPD:
|
||
|
|
case ARM_VST4d32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+2)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VST3q8:
|
||
|
|
case ARM_VST3q16:
|
||
|
|
case ARM_VST3q32:
|
||
|
|
case ARM_VST3q8_UPD:
|
||
|
|
case ARM_VST3q16_UPD:
|
||
|
|
case ARM_VST3q32_UPD:
|
||
|
|
case ARM_VST4q8:
|
||
|
|
case ARM_VST4q16:
|
||
|
|
case ARM_VST4q32:
|
||
|
|
case ARM_VST4q8_UPD:
|
||
|
|
case ARM_VST4q16_UPD:
|
||
|
|
case ARM_VST4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+4)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Fourth input register
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VST4d8:
|
||
|
|
case ARM_VST4d16:
|
||
|
|
case ARM_VST4d32:
|
||
|
|
case ARM_VST4d8_UPD:
|
||
|
|
case ARM_VST4d16_UPD:
|
||
|
|
case ARM_VST4d32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+3)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VST4q8:
|
||
|
|
case ARM_VST4q16:
|
||
|
|
case ARM_VST4q32:
|
||
|
|
case ARM_VST4q8_UPD:
|
||
|
|
case ARM_VST4q16_UPD:
|
||
|
|
case ARM_VST4q32_UPD:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+6)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD1DupInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned align = fieldFromInstruction_4(Insn, 4, 1);
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
|
||
|
|
if (size == 0 && align == 1)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
align *= (1 << size);
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD1DUPq16: case ARM_VLD1DUPq32: case ARM_VLD1DUPq8:
|
||
|
|
case ARM_VLD1DUPq16wb_fixed: case ARM_VLD1DUPq16wb_register:
|
||
|
|
case ARM_VLD1DUPq32wb_fixed: case ARM_VLD1DUPq32wb_register:
|
||
|
|
case ARM_VLD1DUPq8wb_fixed: case ARM_VLD1DUPq8wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
|
||
|
|
// The fixed offset post-increment encodes Rm == 0xd. The no-writeback
|
||
|
|
// variant encodes Rm == 0xf. Anything else is a register offset post-
|
||
|
|
// increment and we need to add the register operand to the instruction.
|
||
|
|
if (Rm != 0xD && Rm != 0xF &&
|
||
|
|
!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD2DupInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned align = fieldFromInstruction_4(Insn, 4, 1);
|
||
|
|
unsigned size = 1 << fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
align *= 2*size;
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VLD2DUPd16: case ARM_VLD2DUPd32: case ARM_VLD2DUPd8:
|
||
|
|
case ARM_VLD2DUPd16wb_fixed: case ARM_VLD2DUPd16wb_register:
|
||
|
|
case ARM_VLD2DUPd32wb_fixed: case ARM_VLD2DUPd32wb_register:
|
||
|
|
case ARM_VLD2DUPd8wb_fixed: case ARM_VLD2DUPd8wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VLD2DUPd16x2: case ARM_VLD2DUPd32x2: case ARM_VLD2DUPd8x2:
|
||
|
|
case ARM_VLD2DUPd16x2wb_fixed: case ARM_VLD2DUPd16x2wb_register:
|
||
|
|
case ARM_VLD2DUPd32x2wb_fixed: case ARM_VLD2DUPd32x2wb_register:
|
||
|
|
case ARM_VLD2DUPd8x2wb_fixed: case ARM_VLD2DUPd8x2wb_register:
|
||
|
|
if (!Check(&S, DecodeDPairSpacedRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rm != 0xF)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(0));
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
|
||
|
|
if (Rm != 0xD && Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD3DupInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned inc = fieldFromInstruction_4(Insn, 5, 1) + 1;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(0));
|
||
|
|
|
||
|
|
if (Rm == 0xD)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
else if (Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD4DupInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
unsigned inc = fieldFromInstruction_4(Insn, 5, 1) + 1;
|
||
|
|
unsigned align = fieldFromInstruction_4(Insn, 4, 1);
|
||
|
|
|
||
|
|
if (size == 0x3) {
|
||
|
|
if (align == 0)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
size = 4;
|
||
|
|
align = 16;
|
||
|
|
} else {
|
||
|
|
if (size == 2) {
|
||
|
|
size = 1 << size;
|
||
|
|
align *= 8;
|
||
|
|
} else {
|
||
|
|
size = 1 << size;
|
||
|
|
align *= 4*size;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+inc)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+2*inc)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, (Rd+3*inc)%32, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
|
||
|
|
if (Rm == 0xD)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
else if (Rm != 0xF) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus
|
||
|
|
DecodeNEONModImmInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 16, 3) << 4;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 24, 1) << 7;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 8, 4) << 8;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 5, 1) << 12;
|
||
|
|
unsigned Q = fieldFromInstruction_4(Insn, 6, 1);
|
||
|
|
|
||
|
|
if (Q) {
|
||
|
|
if (!Check(&S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else {
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VORRiv4i16:
|
||
|
|
case ARM_VORRiv2i32:
|
||
|
|
case ARM_VBICiv4i16:
|
||
|
|
case ARM_VBICiv2i32:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
case ARM_VORRiv8i16:
|
||
|
|
case ARM_VORRiv4i32:
|
||
|
|
case ARM_VBICiv8i16:
|
||
|
|
case ARM_VBICiv4i32:
|
||
|
|
if (!Check(&S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVSHLMaxInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
Rm |= fieldFromInstruction_4(Insn, 5, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 18, 2);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeQPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(8 << size));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeShiftRight8Imm(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(8 - Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeShiftRight16Imm(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(16 - Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeShiftRight32Imm(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(32 - Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeShiftRight64Imm(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(64 - Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeTBLInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
Rn |= fieldFromInstruction_4(Insn, 7, 1) << 4;
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
Rm |= fieldFromInstruction_4(Insn, 5, 1) << 4;
|
||
|
|
unsigned op = fieldFromInstruction_4(Insn, 6, 1);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (op) {
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail; // Writeback
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_VTBL2:
|
||
|
|
case ARM_VTBX2:
|
||
|
|
if (!Check(&S, DecodeDPairRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddSpecialReg(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned dst = fieldFromInstruction_2(Insn, 8, 3);
|
||
|
|
unsigned imm = fieldFromInstruction_2(Insn, 0, 8);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodetGPRRegisterClass(Inst, dst, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
switch(MCInst_getOpcode(Inst)) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case ARM_tADR:
|
||
|
|
break; // tADR does not explicitly represent the PC as an operand.
|
||
|
|
case ARM_tADDrSPi:
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbBROperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(SignExtend32(Val << 1, 12)));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2BROperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(SignExtend32(Val, 21)));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbCmpBROperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val << 1));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddrModeRR(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 0, 3);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 3, 3);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddrModeIS(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 0, 3);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 3, 5);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodetGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddrModePC(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned imm = Val << 2;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
//tryAddingPcLoadReferenceComment(Address, (Address & ~2u) + imm + 4, Decoder);
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddrModeSP(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2AddrModeSOReg(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 6, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 2, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 2);
|
||
|
|
|
||
|
|
// Thumb stores cannot use PC as dest register.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2STRHs:
|
||
|
|
case ARM_t2STRBs:
|
||
|
|
case ARM_t2STRs:
|
||
|
|
if (Rn == 15)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LoadShift(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
|
||
|
|
if (Rn == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRBs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRHs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSHs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSBs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2PLDs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLDpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2PLIs:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLIpci);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rt == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRSHs:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case ARM_t2LDRHs:
|
||
|
|
// FIXME: this instruction is only available with MP extensions,
|
||
|
|
// this should be checked first but we don't have access to the
|
||
|
|
// feature bits here.
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLDWs);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2PLDs:
|
||
|
|
case ARM_t2PLDWs:
|
||
|
|
case ARM_t2PLIs:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned addrmode = fieldFromInstruction_4(Insn, 4, 2);
|
||
|
|
addrmode |= fieldFromInstruction_4(Insn, 0, 4) << 2;
|
||
|
|
addrmode |= fieldFromInstruction_4(Insn, 16, 4) << 6;
|
||
|
|
if (!Check(&S, DecodeT2AddrModeSOReg(Inst, addrmode, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LoadImm8(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned U = fieldFromInstruction_4(Insn, 9, 1);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
imm |= (U << 8);
|
||
|
|
imm |= (Rn << 9);
|
||
|
|
|
||
|
|
if (Rn == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRBi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSBi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRHi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSHi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2PLDi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLDpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2PLIi8:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLIpci);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rt == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRSHi8:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2PLDi8:
|
||
|
|
case ARM_t2PLIi8:
|
||
|
|
case ARM_t2PLDWi8:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LoadImm12(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
imm |= (Rn << 13);
|
||
|
|
|
||
|
|
if (Rn == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRHi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSHi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRBi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSBi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2PLDi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLDpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2PLIi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLIpci);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rt == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRSHi12:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case ARM_t2LDRHi12:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLDi12);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2PLDi12:
|
||
|
|
case ARM_t2PLDWi12:
|
||
|
|
case ARM_t2PLIi12:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeT2AddrModeImm12(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LoadT(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
imm |= (Rn << 9);
|
||
|
|
|
||
|
|
if (Rn == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRT:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRBT:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRHT:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSBT:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSHT:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSHpci);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeT2AddrModeImm8(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LoadLabel(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void* Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
|
||
|
|
int imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
|
||
|
|
if (Rt == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRBpci:
|
||
|
|
case ARM_t2LDRHpci:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLDpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSBpci:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLIpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSHpci:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch(MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2PLDpci:
|
||
|
|
case ARM_t2PLIpci:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!U) {
|
||
|
|
// Special case for #-0.
|
||
|
|
if (imm == 0)
|
||
|
|
imm = INT32_MIN;
|
||
|
|
else
|
||
|
|
imm = -imm;
|
||
|
|
}
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2Imm8S4(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (Val == 0)
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(INT32_MIN));
|
||
|
|
else {
|
||
|
|
int imm = Val & 0xFF;
|
||
|
|
|
||
|
|
if (!(Val & 0x100)) imm *= -1;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm * 4));
|
||
|
|
}
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm8s4(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 9);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeT2Imm8S4(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm0_1020s4(MCInst *Inst,unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 8, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2Imm8(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
int imm = Val & 0xFF;
|
||
|
|
if (Val == 0)
|
||
|
|
imm = INT32_MIN;
|
||
|
|
else if (!(Val & 0x100))
|
||
|
|
imm *= -1;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm8(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 9, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 9);
|
||
|
|
|
||
|
|
// Thumb stores cannot use PC as dest register.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2STRT:
|
||
|
|
case ARM_t2STRBT:
|
||
|
|
case ARM_t2STRHT:
|
||
|
|
case ARM_t2STRi8:
|
||
|
|
case ARM_t2STRHi8:
|
||
|
|
case ARM_t2STRBi8:
|
||
|
|
if (Rn == 15)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Some instructions always use an additive offset.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDRT:
|
||
|
|
case ARM_t2LDRBT:
|
||
|
|
case ARM_t2LDRHT:
|
||
|
|
case ARM_t2LDRSBT:
|
||
|
|
case ARM_t2LDRSHT:
|
||
|
|
case ARM_t2STRT:
|
||
|
|
case ARM_t2STRBT:
|
||
|
|
case ARM_t2STRHT:
|
||
|
|
imm |= 0x100;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeT2Imm8(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LdStPre(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned addr = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
addr |= fieldFromInstruction_4(Insn, 9, 1) << 8;
|
||
|
|
addr |= Rn << 9;
|
||
|
|
unsigned load = fieldFromInstruction_4(Insn, 20, 1);
|
||
|
|
|
||
|
|
if (Rn == 15) {
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2LDR_PRE:
|
||
|
|
case ARM_t2LDR_POST:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRB_PRE:
|
||
|
|
case ARM_t2LDRB_POST:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRH_PRE:
|
||
|
|
case ARM_t2LDRH_POST:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRHpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSB_PRE:
|
||
|
|
case ARM_t2LDRSB_POST:
|
||
|
|
if (Rt == 15)
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2PLIpci);
|
||
|
|
else
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSBpci);
|
||
|
|
break;
|
||
|
|
case ARM_t2LDRSH_PRE:
|
||
|
|
case ARM_t2LDRSH_POST:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2LDRSHpci);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
return DecodeT2LoadLabel(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!load) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (load) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeT2AddrModeImm8(Inst, addr, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2AddrModeImm12(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 13, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 12);
|
||
|
|
|
||
|
|
// Thumb stores cannot use PC as dest register.
|
||
|
|
switch (MCInst_getOpcode(Inst)) {
|
||
|
|
case ARM_t2STRi12:
|
||
|
|
case ARM_t2STRBi12:
|
||
|
|
case ARM_t2STRHi12:
|
||
|
|
if (Rn == 15)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddSPImm(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned imm = fieldFromInstruction_2(Insn, 0, 7);
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbAddSPReg(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
if (MCInst_getOpcode(Inst) == ARM_tADDrSP) {
|
||
|
|
unsigned Rdm = fieldFromInstruction_2(Insn, 0, 3);
|
||
|
|
Rdm |= fieldFromInstruction_2(Insn, 7, 1) << 3;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rdm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else if (MCInst_getOpcode(Inst) == ARM_tADDspr) {
|
||
|
|
unsigned Rm = fieldFromInstruction_2(Insn, 3, 4);
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(ARM_SP));
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbCPS(MCInst *Inst, uint16_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned imod = fieldFromInstruction_2(Insn, 4, 1) | 0x2;
|
||
|
|
unsigned flags = fieldFromInstruction_2(Insn, 0, 3);
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imod));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(flags));
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodePostIdxReg(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned add = fieldFromInstruction_4(Insn, 4, 1);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(add));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbBLXOffset(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
// Val is passed in as S:J1:J2:imm10H:imm10L:'0'
|
||
|
|
// Note only one trailing zero not two. Also the J1 and J2 values are from
|
||
|
|
// the encoded instruction. So here change to I1 and I2 values via:
|
||
|
|
// I1 = NOT(J1 EOR S);
|
||
|
|
// I2 = NOT(J2 EOR S);
|
||
|
|
// and build the imm32 with two trailing zeros as documented:
|
||
|
|
// imm32 = SignExtend(S:I1:I2:imm10H:imm10L:'00', 32);
|
||
|
|
unsigned S = (Val >> 23) & 1;
|
||
|
|
unsigned J1 = (Val >> 22) & 1;
|
||
|
|
unsigned J2 = (Val >> 21) & 1;
|
||
|
|
unsigned I1 = !(J1 ^ S);
|
||
|
|
unsigned I2 = !(J2 ^ S);
|
||
|
|
unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
|
||
|
|
int imm32 = SignExtend32(tmp << 1, 25);
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm32));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeCoprocessor(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (Val == 0xA || Val == 0xB)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbTableBranch(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
|
||
|
|
if (Rn == ARM_SP) S = MCDisassembler_SoftFail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumb2BCCInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 22, 4);
|
||
|
|
if (pred == 0xE || pred == 0xF) {
|
||
|
|
unsigned opc = fieldFromInstruction_4(Insn, 4, 28);
|
||
|
|
switch (opc) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0xf3bf8f4:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2DSB);
|
||
|
|
break;
|
||
|
|
case 0xf3bf8f5:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2DMB);
|
||
|
|
break;
|
||
|
|
case 0xf3bf8f6:
|
||
|
|
MCInst_setOpcode(Inst, ARM_t2ISB);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
return DecodeMemBarrierOption(Inst, imm, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned brtarget = fieldFromInstruction_4(Insn, 0, 11) << 1;
|
||
|
|
brtarget |= fieldFromInstruction_4(Insn, 11, 1) << 19;
|
||
|
|
brtarget |= fieldFromInstruction_4(Insn, 13, 1) << 18;
|
||
|
|
brtarget |= fieldFromInstruction_4(Insn, 16, 6) << 12;
|
||
|
|
brtarget |= fieldFromInstruction_4(Insn, 26, 1) << 20;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeT2BROperand(Inst, brtarget, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Decode a shifted immediate operand. These basically consist
|
||
|
|
// of an 8-bit value, and a 4-bit directive that specifies either
|
||
|
|
// a splat operation or a rotation.
|
||
|
|
static DecodeStatus DecodeT2SOImm(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned ctrl = fieldFromInstruction_4(Val, 10, 2);
|
||
|
|
if (ctrl == 0) {
|
||
|
|
unsigned byte = fieldFromInstruction_4(Val, 8, 2);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Val, 0, 8);
|
||
|
|
switch (byte) {
|
||
|
|
case 0:
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm((imm << 16) | imm));
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm((imm << 24) | (imm << 8)));
|
||
|
|
break;
|
||
|
|
case 3:
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm((imm << 24) | (imm << 16) |
|
||
|
|
(imm << 8) | imm));
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
unsigned unrot = fieldFromInstruction_4(Val, 0, 7) | 0x80;
|
||
|
|
unsigned rot = fieldFromInstruction_4(Val, 7, 5);
|
||
|
|
unsigned imm = (unrot >> rot) | (unrot << ((32-rot)&31));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm));
|
||
|
|
}
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbBCCTargetOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(SignExtend32(Val << 1, 9)));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeThumbBLTargetOperand(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
// Val is passed in as S:J1:J2:imm10:imm11
|
||
|
|
// Note no trailing zero after imm11. Also the J1 and J2 values are from
|
||
|
|
// the encoded instruction. So here change to I1 and I2 values via:
|
||
|
|
// I1 = NOT(J1 EOR S);
|
||
|
|
// I2 = NOT(J2 EOR S);
|
||
|
|
// and build the imm32 with one trailing zero as documented:
|
||
|
|
// imm32 = SignExtend(S:I1:I2:imm10:imm11:'0', 32);
|
||
|
|
unsigned S = (Val >> 23) & 1;
|
||
|
|
unsigned J1 = (Val >> 22) & 1;
|
||
|
|
unsigned J2 = (Val >> 21) & 1;
|
||
|
|
unsigned I1 = !(J1 ^ S);
|
||
|
|
unsigned I2 = !(J2 ^ S);
|
||
|
|
unsigned tmp = (Val & ~0x600000) | (I1 << 22) | (I2 << 21);
|
||
|
|
int imm32 = SignExtend32(tmp << 1, 25);
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(imm32));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeMemBarrierOption(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (Val & ~0xf)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeInstSyncBarrierOption(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (Val & ~0xf)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeMSRMask(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
if (!Val) return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDoubleRegLoad(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (Rn == 0xF)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeDoubleRegStore(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (Rn == 0xF || Rd == Rn || Rd == Rt || Rd == Rt+1)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRPairRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeLDRPreImm(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (Rn == 0xF || Rn == Rt) S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeLDRPreReg(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
|
||
|
|
if (Rn == 0xF || Rn == Rt) S = MCDisassembler_SoftFail;
|
||
|
|
if (Rm == 0xF) S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSTRPreImm(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (Rn == 0xF || Rn == Rt) S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeAddrModeImm12Operand(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSTRPreReg(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 0, 12);
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 16, 4) << 13;
|
||
|
|
imm |= fieldFromInstruction_4(Insn, 23, 1) << 12;
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (Rn == 0xF || Rn == Rt) S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeSORegMemOperand(Inst, imm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD1LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
|
||
|
|
switch (fieldFromInstruction_4(Insn, 4, 2)) {
|
||
|
|
case 0 :
|
||
|
|
align = 0; break;
|
||
|
|
case 3:
|
||
|
|
align = 4; break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVST1LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
|
||
|
|
switch (fieldFromInstruction_4(Insn, 4, 2)) {
|
||
|
|
case 0:
|
||
|
|
align = 0; break;
|
||
|
|
case 3:
|
||
|
|
align = 4; break;
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD2LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
unsigned inc = 1;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 2;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 4;
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1) != 0)
|
||
|
|
align = 8;
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVST2LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
unsigned inc = 1;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 2;
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 4;
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1) != 0)
|
||
|
|
align = 8;
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD3LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
unsigned inc = 1;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 2))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVST3LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
unsigned inc = 1;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 2))
|
||
|
|
return MCDisassembler_Fail; // UNDEFINED
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVLD4LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
unsigned inc = 1;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 4;
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 8;
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
switch (fieldFromInstruction_4(Insn, 4, 2)) {
|
||
|
|
case 0:
|
||
|
|
align = 0; break;
|
||
|
|
case 3:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
align = 4 << fieldFromInstruction_4(Insn, 4, 2); break;
|
||
|
|
}
|
||
|
|
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVST4LN(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rd = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
Rd |= fieldFromInstruction_4(Insn, 22, 1) << 4;
|
||
|
|
unsigned size = fieldFromInstruction_4(Insn, 10, 2);
|
||
|
|
|
||
|
|
unsigned align = 0;
|
||
|
|
unsigned index = 0;
|
||
|
|
unsigned inc = 1;
|
||
|
|
switch (size) {
|
||
|
|
default:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
case 0:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 4;
|
||
|
|
index = fieldFromInstruction_4(Insn, 5, 3);
|
||
|
|
break;
|
||
|
|
case 1:
|
||
|
|
if (fieldFromInstruction_4(Insn, 4, 1))
|
||
|
|
align = 8;
|
||
|
|
index = fieldFromInstruction_4(Insn, 6, 2);
|
||
|
|
if (fieldFromInstruction_4(Insn, 5, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
case 2:
|
||
|
|
switch (fieldFromInstruction_4(Insn, 4, 2)) {
|
||
|
|
case 0:
|
||
|
|
align = 0; break;
|
||
|
|
case 3:
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
default:
|
||
|
|
align = 4 << fieldFromInstruction_4(Insn, 4, 2); break;
|
||
|
|
}
|
||
|
|
|
||
|
|
index = fieldFromInstruction_4(Insn, 7, 1);
|
||
|
|
if (fieldFromInstruction_4(Insn, 6, 1))
|
||
|
|
inc = 2;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Rm != 0xF) { // Writeback
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
}
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(align));
|
||
|
|
if (Rm != 0xF) {
|
||
|
|
if (Rm != 0xD) {
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
} else
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateReg(0));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+2*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Rd+3*inc, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(index));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVMOVSRR(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rt2 = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 5, 1);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
Rm |= fieldFromInstruction_4(Insn, 0, 4) << 1;
|
||
|
|
|
||
|
|
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVMOVRRS(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rt2 = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Insn, 5, 1);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
Rm |= fieldFromInstruction_4(Insn, 0, 4) << 1;
|
||
|
|
|
||
|
|
if (Rt == 0xF || Rt2 == 0xF || Rm == 0x1F)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt , Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRRegisterClass(Inst, Rt2 , Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm , Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeSPRRegisterClass(Inst, Rm+1, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeIT(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 4, 4);
|
||
|
|
unsigned mask = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
|
||
|
|
if (pred == 0xF) {
|
||
|
|
pred = 0xE;
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mask == 0x0)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(pred));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(mask));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2LDRDPreInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rt2 = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned addr = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
|
||
|
|
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
|
||
|
|
bool writeback = (W == 1) | (P == 0);
|
||
|
|
|
||
|
|
addr |= (U << 8) | (Rn << 9);
|
||
|
|
|
||
|
|
if (writeback && (Rn == Rt || Rn == Rt2))
|
||
|
|
Check(&S, MCDisassembler_SoftFail);
|
||
|
|
if (Rt == Rt2)
|
||
|
|
Check(&S, MCDisassembler_SoftFail);
|
||
|
|
|
||
|
|
// Rt
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// Rt2
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// Writeback operand
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// addr
|
||
|
|
if (!Check(&S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2STRDPreInstruction(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rt2 = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned addr = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
unsigned W = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
unsigned U = fieldFromInstruction_4(Insn, 23, 1);
|
||
|
|
unsigned P = fieldFromInstruction_4(Insn, 24, 1);
|
||
|
|
bool writeback = (W == 1) | (P == 0);
|
||
|
|
|
||
|
|
addr |= (U << 8) | (Rn << 9);
|
||
|
|
|
||
|
|
if (writeback && (Rn == Rt || Rn == Rt2))
|
||
|
|
Check(&S, MCDisassembler_SoftFail);
|
||
|
|
|
||
|
|
// Writeback operand
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// Rt
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// Rt2
|
||
|
|
if (!Check(&S, DecoderGPRRegisterClass(Inst, Rt2, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
// addr
|
||
|
|
if (!Check(&S, DecodeT2AddrModeImm8s4(Inst, addr, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2Adr(MCInst *Inst, uint32_t Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned sign1 = fieldFromInstruction_4(Insn, 21, 1);
|
||
|
|
unsigned sign2 = fieldFromInstruction_4(Insn, 23, 1);
|
||
|
|
if (sign1 != sign2) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
unsigned Val = fieldFromInstruction_4(Insn, 0, 8);
|
||
|
|
Val |= fieldFromInstruction_4(Insn, 12, 3) << 8;
|
||
|
|
Val |= fieldFromInstruction_4(Insn, 26, 1) << 11;
|
||
|
|
Val |= sign1 << 12;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(SignExtend32(Val, 13)));
|
||
|
|
|
||
|
|
return MCDisassembler_Success;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeT2ShifterImmOperand(MCInst *Inst, uint32_t Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// Shift of "asr #32" is not allowed in Thumb2 mode.
|
||
|
|
if (Val == 0x20) S = MCDisassembler_SoftFail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(Val));
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeSwap(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Insn, 12, 4);
|
||
|
|
unsigned Rt2 = fieldFromInstruction_4(Insn, 0, 4);
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Insn, 16, 4);
|
||
|
|
unsigned pred = fieldFromInstruction_4(Insn, 28, 4);
|
||
|
|
|
||
|
|
if (pred == 0xF)
|
||
|
|
return DecodeCPSInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
if (Rt == Rn || Rn == Rt2)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, pred, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVCVTD(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned Vd = (fieldFromInstruction_4(Insn, 12, 4) << 0);
|
||
|
|
Vd |= (fieldFromInstruction_4(Insn, 22, 1) << 4);
|
||
|
|
unsigned Vm = (fieldFromInstruction_4(Insn, 0, 4) << 0);
|
||
|
|
Vm |= (fieldFromInstruction_4(Insn, 5, 1) << 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 16, 6);
|
||
|
|
unsigned cmode = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned op = fieldFromInstruction_4(Insn, 5, 1);
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// VMOVv2f32 is ambiguous with these decodings.
|
||
|
|
if (!(imm & 0x38) && cmode == 0xF) {
|
||
|
|
if (op == 1) return MCDisassembler_Fail;
|
||
|
|
MCInst_setOpcode(Inst, ARM_VMOVv2f32);
|
||
|
|
return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(imm & 0x20)) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeDPRRegisterClass(Inst, Vm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(64 - imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeVCVTQ(MCInst *Inst, unsigned Insn,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
unsigned Vd = (fieldFromInstruction_4(Insn, 12, 4) << 0);
|
||
|
|
Vd |= (fieldFromInstruction_4(Insn, 22, 1) << 4);
|
||
|
|
unsigned Vm = (fieldFromInstruction_4(Insn, 0, 4) << 0);
|
||
|
|
Vm |= (fieldFromInstruction_4(Insn, 5, 1) << 4);
|
||
|
|
unsigned imm = fieldFromInstruction_4(Insn, 16, 6);
|
||
|
|
unsigned cmode = fieldFromInstruction_4(Insn, 8, 4);
|
||
|
|
unsigned op = fieldFromInstruction_4(Insn, 5, 1);
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
// VMOVv4f32 is ambiguous with these decodings.
|
||
|
|
if (!(imm & 0x38) && cmode == 0xF) {
|
||
|
|
if (op == 1) return MCDisassembler_Fail;
|
||
|
|
MCInst_setOpcode(Inst, ARM_VMOVv4f32);
|
||
|
|
return DecodeNEONModImmInstruction(Inst, Insn, Address, Decoder);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(imm & 0x20)) return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeQPRRegisterClass(Inst, Vd, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeQPRRegisterClass(Inst, Vm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(64 - imm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeLDR(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned Rn = fieldFromInstruction_4(Val, 16, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Val, 12, 4);
|
||
|
|
unsigned Rm = fieldFromInstruction_4(Val, 0, 4);
|
||
|
|
Rm |= (fieldFromInstruction_4(Val, 23, 1) << 4);
|
||
|
|
unsigned Cond = fieldFromInstruction_4(Val, 28, 4);
|
||
|
|
|
||
|
|
if (fieldFromInstruction_4(Val, 8, 4) != 0 || Rn == Rt)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeAddrMode7Operand(Inst, Rn, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePostIdxReg(Inst, Rm, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodePredicateOperand(Inst, Cond, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DecodeStatus DecodeMRRC2(MCInst *Inst, unsigned Val,
|
||
|
|
uint64_t Address, const void *Decoder)
|
||
|
|
{
|
||
|
|
|
||
|
|
DecodeStatus S = MCDisassembler_Success;
|
||
|
|
|
||
|
|
unsigned CRm = fieldFromInstruction_4(Val, 0, 4);
|
||
|
|
unsigned opc1 = fieldFromInstruction_4(Val, 4, 4);
|
||
|
|
unsigned cop = fieldFromInstruction_4(Val, 8, 4);
|
||
|
|
unsigned Rt = fieldFromInstruction_4(Val, 12, 4);
|
||
|
|
unsigned Rt2 = fieldFromInstruction_4(Val, 16, 4);
|
||
|
|
|
||
|
|
if ((cop & ~0x1) == 0xa)
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
|
||
|
|
if (Rt == Rt2)
|
||
|
|
S = MCDisassembler_SoftFail;
|
||
|
|
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(cop));
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(opc1));
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
if (!Check(&S, DecodeGPRnopcRegisterClass(Inst, Rt2, Address, Decoder)))
|
||
|
|
return MCDisassembler_Fail;
|
||
|
|
MCInst_addOperand(Inst, MCOperand_CreateImm(CRm));
|
||
|
|
|
||
|
|
return S;
|
||
|
|
}
|
||
|
|
|