public static UInt32 tq_I(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
instr.ops[op_index].flags |= (byte)OP_TYPE.OPERAND_TYPE_IMM;
instr.ops[op_index].size = (ushort)opsize.size;
instr.ops[op_index].value.imm.size = (byte)opsize.size_in_stream;
instr.ops[op_index].value.imm .offset = (byte)(offset - origin_offset);
//instr.ops[op_index].value.imm.immab = assembly.Image.ReadBytes(offset, opsize.size_in_stream);
byte[] bt = assembly.ReadBytes(offset, (int)opsize.size_in_stream);
instr.ops[op_index].value.imm.imm64 = 0;
foreach (byte bb in bt.Reverse())
{
instr.ops[op_index].value.imm.imm64 <<= 8;
instr.ops[op_index].value.imm.imm64 += bb;
}
//!!!memcpy(&(instr.ops[op_index].value.imm.imm8), offset, opsize.size_in_stream);
//movsx(ref instr.ops[op_index].value.imm.immab, opsize.size_in_stream, 0x8);
return (byte)opsize.size_in_stream;
}
static UInt32 post_proc_cmpxchg8b(ulong origin_offset, ulong offset, ref INSTRUCTION instr, INTERNAL_DATA idata, DISMODE mode)
{
if ((idata.prefixes[PREF_REX_INDEX] != 0xFF) && ((instr.rex & PREFIX_REX_W)!=0))
{
idata.is_rex_used = 1;
instr.mnemonic = "cmpxchg16b";
instr.ops[0].size = (ushort)OP_SIZE.OPERAND_SIZE_128;
}
return 0;
}
static UInt32 post_proc_nop_pause(ulong origin_offset, ulong offset, ref INSTRUCTION instr, INTERNAL_DATA idata, DISMODE mode)
{
if (idata.prefixes[PREF_REP_INDEX] == PREF_REPNZ_ID)
{
instr.id = ID_PAUSE;
instr.groups = GRP_CACHECT | GRP_SSE2;
idata.prefixes[PREF_REP_INDEX] = 0xFF;
instr.mnemonic ="pause";
}
return 0;
}
//Parses instruction's mnemonic. If mnemonic is simple, it is just copied to
// struct INSTRUCTION. If mnemonic contains has multi mnemonic indicator (MM_INDICATOR)
// at first character then it depends on implicit operand's size. In this case the function
// calls get_instruction_opsize and builds choses mnemonic basing on result.
static void parse_mnemonic(OPCODE_DESCRIPTOR opcode, INSTRUCTION instr, INTERNAL_DATA idata, DISMODE mode)
{
if ((opcode.mnemonic.value.Length>0) && (opcode.mnemonic.value[0] != MM_INDICATOR))
{
instr.mnemonic = opcode.mnemonic.value;
}
else
{
get_instruction_opsize(opcode.mnemonic, instr, idata, mode);
instr.mnemonic = opcode.mnemonic.values[bsr(instr.opsize) - 1];
}
}
//Parses operand accordingly to MODRM value.
static UInt32 parse_rm_operand(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, ref INTERNAL_DATA idata, DISMODE mode)
{
UInt32 len = 0;
if ((instr.modrm & 0xC0) == 0xC0)
{
create_genreg_operand(ref instr, op_index, (byte)(instr.modrm & 0x7), opsize.size, PREFIX_REX_B, ref idata, mode);
}
else
{
len = parse_mem_operand(origin_offset, offset, ref instr, op_index, opsize, idata, mode);
}
return len;
}
//Calculates segment for memory addressing operands accordingly to
//mode, segment override prefixes and address base register.
static void get_seg(ref INSTRUCTION instr, int op_index, byte[] prefixes, DISMODE mode)
{
if (prefixes[PREF_SEG_INDEX] == 0xFF)
{
if (mode == DISMODE.DISASSEMBLE_MODE_64)
{
instr.ops[op_index].value.addr.seg = SREG_CODE_CS;
}
else
{
if ( (instr.ops[op_index].value.addr.mod & ADDR_MOD_BASE)==0 )
{
instr.ops[op_index].value.addr.seg = SREG_CODE_DS;
}
else
{
if ((instr.ops[op_index].value.addr.bas != REG_CODE_BP) && (instr.ops[op_index].value.addr.bas != REG_CODE_SP))
{
instr.ops[op_index].value.addr.seg = SREG_CODE_DS;
}
else
{
instr .ops[op_index].value.addr.seg = SREG_CODE_SS;
}
}
}
}
else
{
if (mode != DISMODE.DISASSEMBLE_MODE_64)
{
instr.ops[op_index].value.addr.seg = sregs[prefixes[PREF_SEG_INDEX]];
}
else
{
if (prefixes[PREF_SEG_INDEX] == PREF_FS_ID || prefixes[PREF_SEG_INDEX] == PREF_GS_ID)
{
instr.ops[op_index].value.addr.seg = sregs[prefixes[PREF_SEG_INDEX]];
}
else
{
instr.ops[op_index].value.addr.seg = SREG_CODE_CS;
}
}
}
}
//Parses 16bit memory address operand.
static UInt32 parse_mem_operand_16(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, DISMODE mode)
{
byte len;
int index;
instr.ops[op_index].value.addr.mod = (byte)(instr.modrm >> 0x6);
len = get_disp(origin_offset, offset, ref instr, op_index, mode);
index = (instr.modrm >> 0x3 & 0x18) | (instr.modrm & 0x7);
instr.ops[op_index].value.addr.seg = addrs_16bit[index].seg;
instr.ops[op_index].value.addr.mod = addrs_16bit[index].mod;
instr.ops[op_index].value.addr.bas = addrs_16bit[index].bas;
instr.ops[op_index].value.addr.index = addrs_16bit[index].index;
instr.ops[op_index].value.addr.scale = addrs_16bit[index].scale;
return len;
}
public static UInt32 tq_T(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
create_reg_operand(ref instr, op_index, REG_TYPE.REG_TYPE_TR, (byte)((instr.modrm >> 0x3) & 0x7), opsize.size);
return 0x0;
}
public static UInt32 tq_V(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
create_xmmreg_operand(ref instr, op_index, (byte)((instr.modrm >> 0x3) & 0x7), opsize.size, PREFIX_REX_R, ref idata, mode);
return 0;
}
public static UInt32 tq_rSP(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
create_genreg_operand(ref instr, op_index, REG_CODE_SP, opsize.size, PREFIX_REX_B, ref idata, mode);
return 0x0;
}
public static UInt32 tq_SS(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
create_reg_operand(ref instr, op_index, REG_TYPE.REG_TYPE_SEG, SREG_CODE_SS, opsize.size);
return 0;
}
public static UInt32 tq_R(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res = parse_rm_operand(origin_offset, offset, ref instr, op_index, opsize, ref idata, mode);
if ((instr.modrm & 0xC0) != 0xC0)
{
idata.err = ERRS.ERR_RM_MEM;//error: rm encodes memory.
}
return res;
}
public static UInt32 tq_O(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res;
res = instr.addrsize;
instr.ops[op_index].flags |= (byte) OP_TYPE.OPERAND_TYPE_MEM;
instr.ops[op_index].size = (ushort)opsize.size;
instr.ops[op_index].value.addr.mod = ADDR_MOD_DISP;
//instr.disp.value.ab = assembly.Image.ReadBytes(offset, instr.addrsize);
byte[] bt = assembly.ReadBytes(offset, instr.addrsize);
instr.disp.value.d64 = 0;
foreach (byte bb in bt.Reverse())
{
instr.disp.value.d64 <<= 8;
instr.disp.value.d64 += bb;
}
get_seg(ref instr, op_index, idata.prefixes, mode);
return res;
}
public static UInt32 tq_J(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
instr.ops[op_index].flags |= OPERAND_FLAG_REL;
return tq_I(origin_offset, offset, ref instr, op_index, opsize, idata, mode);
}
//Calculates displacement's size and copies it to struct DISPLACEMENT.
static byte get_disp(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, DISMODE mode)
{
byte len = 0;
switch(instr.ops[op_index].value.addr.mod)
{
case 0x0:
if (instr.ops[op_index].value.addr.bas == REG_CODE_BP)
len = instr.addrsize;
else
len = 0x0;
break;
case 0x1:
len = 0x1;
break;
case 0x2:
len = instr.addrsize;
break;
}
if (len == 8)
len = 4;
instr.disp.size = len;
if (len!=0)
{
//instr.disp.value.ab = assembly.Image.ReadBytes(offset, len);
byte[] bt = assembly.ReadBytes(offset, len);
instr.disp.value.d64 = 0;
foreach (byte bb in bt.Reverse())
{
instr.disp.value.d64 <<= 8;
instr.disp.value.d64 += bb;
}
movsx(ref instr.disp.value.d64, len, 0x8);
instr.disp.offset = (byte)(offset - origin_offset);
}
return len;
}
public static UInt32 tq_W(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res;
if ((instr.modrm & 0xC0) == 0xC0)
{
create_xmmreg_operand(ref instr, op_index, (byte)(instr.modrm & 0x7), opsize.size, PREFIX_REX_B, ref idata, mode);
res = 0;
}
else
{
res = parse_mem_operand(origin_offset, offset, ref instr, op_index, opsize, idata, mode);
}
return res;
}
//Get instruction's size. Well, really this is size of implicit operand
// that influences on instruction's mnemonic.
static void get_instruction_opsize(MULTI_MNEMONIC multi_mnemonic, INSTRUCTION instr, INTERNAL_DATA idata, DISMODE mode)
{
OPERAND_SIZE opsize = new OPERAND_SIZE();
if (multi_mnemonic.size >= sq_handlers.Count())
{
idata.severe_err = ERRS.ERR_INTERNAL;
}
else
{
sq_handlers[multi_mnemonic.size](ref opsize, ref instr, idata, mode);
}
instr.opsize = (byte)opsize.size; //Possible sizes are 2/4/8.
}
public static UInt32 tq_X(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res;
res = 0;
instr.ops[op_index].flags |= (byte)OP_TYPE.OPERAND_TYPE_MEM;
instr.ops[op_index].size = (ushort)opsize.size;
instr.ops[op_index].value.addr.mod = ADDR_MOD_BASE;
instr.ops[op_index].value.addr.bas = REG_CODE_SI;
get_seg(ref instr, op_index, idata.prefixes, mode);
return 0x0;
}
//Parses memory address operand.
static UInt32 parse_mem_operand(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 len;
instr.ops[op_index].flags |= (byte)OP_TYPE.OPERAND_TYPE_MEM;
instr.ops[op_index].size = (ushort)opsize.size;
if (instr.addrsize == ADDR_SIZE_16)
{
len = parse_mem_operand_16(origin_offset, offset, ref instr, op_index, mode);
}
else
{
len = parse_mem_operand_32_64(origin_offset, offset, ref instr, op_index, idata, mode);
}
idata.is_addrsize_used = 1;
return len;
}
public static UInt32 tq_Y(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
instr.ops[op_index].flags |= (byte)OP_TYPE.OPERAND_TYPE_MEM;
instr.ops[op_index].size = (ushort)opsize.size;
if (mode == DISMODE.DISASSEMBLE_MODE_64)
instr.ops[op_index].value.addr.seg = SREG_CODE_CS;
else
instr.ops[op_index].value.addr.seg = SREG_CODE_ES;
instr.ops[op_index].value.addr.mod = ADDR_MOD_BASE;
instr.ops[op_index].value.addr.bas = REG_CODE_DI;
return 0x0;
}
//Parses 32/64bit memory address operand.
static UInt32 parse_mem_operand_32_64(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 len = 0;
if ((instr.flags & INSTR_FLAG_SIB)!=0)
{
instr.ops[op_index].value.addr.mod = (byte)(instr.modrm >> 0x6);
instr.ops[op_index].value.addr.bas = (byte)(instr.sib & 0x7);
instr.ops[op_index].value.addr.index = (byte)((instr.sib >> 3) & 0x7);
instr.ops[op_index].value.addr.scale = (byte)(1 << (instr.sib >> 0x6));
if (mode == DISMODE.DISASSEMBLE_MODE_64 && idata.prefixes[PREF_REX_INDEX] != 0xFF)
{
if ((instr.rex & PREFIX_REX_B)!=0)
{
instr.ops[op_index].value.addr.bas |= REG_CODE_64;
idata.is_rex_used = 1;
}
if ((instr.rex & PREFIX_REX_X)!=0)
{
instr.ops[op_index].value.addr.index |= REG_CODE_64;
idata.is_rex_used = 1;
}
}
len = get_disp(origin_offset, offset, ref instr, op_index, mode);
get_mod_type_sib(ref instr, op_index);
}
else
{
instr.ops[op_index].value.addr.mod = (byte)(instr.modrm >> 0x6);
instr.ops[op_index].value.addr.bas = (byte)(instr.modrm & 0x7);
if (mode == DISMODE.DISASSEMBLE_MODE_64)
{
if ((idata.prefixes[PREF_REX_INDEX] != 0xFF) && ((instr.rex & PREFIX_REX_B)!=0))
{
instr.ops[op_index].value.addr.bas |= REG_CODE_64;
idata.is_rex_used = 1;
}
if ( (instr.ops[op_index].value.addr.mod == 0x0) &&
((instr.ops[op_index].value.addr.bas == REG_CODE_BP) ||
(instr.ops[op_index].value.addr.bas == REG_CODE_R13)) )
{
instr.ops[op_index].value.addr.bas = REG_CODE_IP;
}
}
len = get_disp(origin_offset, offset, ref instr, op_index, mode);
get_mod_type_modrm(ref instr, op_index);
}
get_seg(ref instr, op_index, idata.prefixes, mode);
return len;
}
public static UInt32 tq_Z(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
byte[] bt = assembly.ReadBytes(offset - 1, 1);
//We already consumed opcode, hence we need to look backward.
create_genreg_operand(ref instr, op_index, (byte)(bt[0] & 0x7), opsize.size, PREFIX_REX_B, ref idata, mode);
return 0x0;
}
static UInt32 parse_operand(ulong origin_offset, ulong offset, INTERNAL_OPERAND iop, INSTRUCTION instr, int op_index, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res = 0;
OPERAND_SIZE opsize = new OPERAND_SIZE();
if (iop.type != TQ_NULL)
{
instr.ops[op_index].flags |= OPERAND_FLAG_PRESENT;
if (iop.size >= sq_handlers.Count())
{
idata.severe_err = ERRS.ERR_INTERNAL;
}
else
{
sq_handlers[iop.size](ref opsize, ref instr, idata, mode);
}
if (iop.size >= tq_handlers.Count())
{
idata.severe_err = ERRS.ERR_INTERNAL;
}
else
{
res = tq_handlers[iop.type](origin_offset, offset, ref instr, op_index, opsize, idata, mode);
}
}
return res;
}
static void create_genreg_operand(ref INSTRUCTION instr, int op_index, byte code, OP_SIZE size, byte rex, ref INTERNAL_DATA idata, DISMODE mode)
{
if (mode == DISMODE.DISASSEMBLE_MODE_64 && idata.prefixes[PREF_REX_INDEX] != 0xFF)
{
if (code > REG_CODE_BX && size == OP_SIZE.OPERAND_SIZE_8)
{
code |= REG_CODE_64;
code += 0x4;
idata.is_rex_used = 1;
}
if ((instr.rex & rex)!=0)
{
code |= REG_CODE_64;
idata.is_rex_used = 1;
}
}
create_reg_operand(ref instr, op_index, REG_TYPE.REG_TYPE_GEN, code, size);
}
/*************************
* Postprocessing routines.
**************************
*/
static UInt32 post_proc_arpl_movsxd(ulong origin_offset, ulong offset, ref INSTRUCTION instr, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res;
res = 0;
if (mode == DISMODE.DISASSEMBLE_MODE_64)
{
OPERAND_SIZE opsize = new OPERAND_SIZE();
instr.id = ID_MOVSXD;
instr.groups = GRP_GEN | GRP_CONVER;
instr.tested_flags = 0;
instr.modified_flags = 0;
instr.set_flags = 0;
instr.cleared_flags = 0;
instr.flags &= (ushort)(INSTR_FLAG_MODRM | INSTR_FLAG_SIB);
instr.mnemonic = "movsxd";
byte[] bt = assembly.ReadBytes((ulong)instr.opcode_offset + 1, 4);
res = (UInt32)(
bt[0] +
bt[1]*256 +
bt[2]*256*256 +
bt[3]*256*256*256);
offset += res;
if ((instr.flags & INSTR_FLAG_MODRM)!=0)
{
res++;
offset++;
}
if ((instr.flags & INSTR_FLAG_SIB)!=0)
{
res++;
offset++;
}
instr.ops[0].value.imm.imm64 = 0;
instr.ops[1].value.imm.imm64 = 0;
instr.ops[0].flags = OPERAND_FLAG_PRESENT;
instr.ops[1].flags = OPERAND_FLAG_PRESENT;
sq_dqp(ref opsize, ref instr, idata, mode);
res += tq_G(origin_offset, offset, ref instr, 0, opsize, idata, mode);
sq_d(ref opsize, ref instr, idata, mode);
res += tq_E(origin_offset, offset, ref instr, 1, opsize, idata, mode);
}
return res;
}
static void create_xmmreg_operand(ref INSTRUCTION instr, int op_index, byte code, OP_SIZE size, byte rex, ref INTERNAL_DATA idata, DISMODE mode)
{
if ((mode == DISMODE.DISASSEMBLE_MODE_64) && (idata.prefixes[PREF_REX_INDEX] != 0xFF))
{
if ((instr.rex & rex)!=0)
{
code |= REG_CODE_64;
idata.is_rex_used = 1;
}
}
create_reg_operand(ref instr, op_index, REG_TYPE.REG_TYPE_XMM, code, size);
}
static UInt32 post_proc_multinop(ulong origin_offset, ulong offset, ref INSTRUCTION instr, INTERNAL_DATA idata, DISMODE mode)
{
instr.ops[0].flags &= (byte)~OPERAND_FLAG_PRESENT;
instr.ops[1].flags &= (byte)~OPERAND_FLAG_PRESENT;
instr.ops[2].flags &= (byte)~OPERAND_FLAG_PRESENT;
return 0;
}
//Returns address size. Address size is common for all operands.
static void get_address_size(ref INSTRUCTION instr, byte[] prefixes, DISMODE mode)
{
if (mode == DISMODE.DISASSEMBLE_MODE_64)
{
if (prefixes[PREF_ADDRSIZE_INDEX] != 0xFF)
instr.addrsize = ADDR_SIZE_32;
else
instr.addrsize = ADDR_SIZE_64;
}
else
{
if (prefixes[PREF_ADDRSIZE_INDEX] != 0xFF)
mode ^= (DISMODE.DISASSEMBLE_MODE_16 | DISMODE.DISASSEMBLE_MODE_32);
if (mode == DISMODE.DISASSEMBLE_MODE_16)
instr.addrsize = ADDR_SIZE_16;
else
instr.addrsize = ADDR_SIZE_32;
}
}
static UInt32 tq_1(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
instr.ops[op_index].flags |= (byte)OP_TYPE.OPERAND_TYPE_IMM;
instr.ops[op_index].size = (ushort)OP_SIZE.OPERAND_SIZE_8;
instr.ops[op_index].value.imm.imm8 = 0x1;
return 0x0;
}
public static UInt32 tq_fES(ulong origin_offset, ulong offset, ref INSTRUCTION instr, int op_index, OPERAND_SIZE opsize, INTERNAL_DATA idata, DISMODE mode)
{
UInt32 res;
if ((instr.modrm & 0xC0) == 0xC0)
res = tq_fEST(origin_offset, offset, ref instr, op_index, opsize, idata, mode);
else
res = tq_M(origin_offset, offset, ref instr, op_index, opsize, idata, mode);
return res;
}
