diff options
Diffstat (limited to 'src/long_mode/mod.rs')
| -rw-r--r-- | src/long_mode/mod.rs | 468 |
1 files changed, 209 insertions, 259 deletions
diff --git a/src/long_mode/mod.rs b/src/long_mode/mod.rs index 8d83986..578e2f2 100644 --- a/src/long_mode/mod.rs +++ b/src/long_mode/mod.rs @@ -10,7 +10,7 @@ pub use self::display::DisplayStyle; use core::cmp::PartialEq; use core::hint::unreachable_unchecked; -use yaxpeax_arch::{AddressDiff, Decoder, LengthedInstruction}; +use yaxpeax_arch::{AddressDiff, Decoder, Reader, LengthedInstruction}; use core::fmt; impl fmt::Display for DecodeError { @@ -2657,6 +2657,7 @@ pub struct Arch; impl yaxpeax_arch::Arch for Arch { type Address = u64; + type Word = u8; type Instruction = Instruction; type DecodeError = DecodeError; type Decoder = InstDecoder; @@ -4095,16 +4096,14 @@ impl Default for InstDecoder { } } -impl Decoder<Instruction> for InstDecoder { - type Error = DecodeError; - - fn decode<T: IntoIterator<Item=u8>>(&self, bytes: T) -> Result<Instruction, Self::Error> { +impl Decoder<Arch> for InstDecoder { + fn decode<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(&self, words: &mut T) -> Result<Instruction, <Arch as yaxpeax_arch::Arch>::DecodeError> { let mut instr = Instruction::invalid(); - decode_one(self, bytes, &mut instr) + read_instr(self, words, &mut instr) .map(|_: ()| instr) } - fn decode_into<T: IntoIterator<Item=u8>>(&self, instr: &mut Instruction, bytes: T) -> Result<(), Self::Error> { - decode_one(self, bytes, instr) + fn decode_into<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(&self, instr: &mut Instruction, words: &mut T) -> Result<(), <Arch as yaxpeax_arch::Arch>::DecodeError> { + read_instr(self, words, instr) } } @@ -5412,46 +5411,46 @@ const OPCODES: [OpcodeRecord; 256] = [ ]; #[allow(non_snake_case)] -pub(self) fn read_E<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, width: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +pub(self) fn read_E<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8, width: u8) -> Result<OperandSpec, DecodeError> { let bank = width_to_gp_reg_bank(width, instr.prefixes.rex().present()); if modrm >= 0b11000000 { read_modrm_reg(instr, modrm, bank) } else { - read_M(bytes_iter, instr, modrm, length) + read_M(words, instr, modrm) } } #[allow(non_snake_case)] -pub(self) fn read_E_mm<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +pub(self) fn read_E_mm<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8) -> Result<OperandSpec, DecodeError> { if modrm >= 0b11000000 { instr.modrm_mmm = RegSpec { bank: RegisterBank::MM, num: modrm & 7 }; Ok(OperandSpec::RegMMM) } else { - read_M(bytes_iter, instr, modrm, length) + read_M(words, instr, modrm) } } #[allow(non_snake_case)] -pub(self) fn read_E_st<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +pub(self) fn read_E_st<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8) -> Result<OperandSpec, DecodeError> { if modrm >= 0b11000000 { instr.modrm_mmm = RegSpec { bank: RegisterBank::ST, num: modrm & 7 }; Ok(OperandSpec::RegMMM) } else { - read_M(bytes_iter, instr, modrm, length) + read_M(words, instr, modrm) } } #[allow(non_snake_case)] -pub(self) fn read_E_xmm<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +pub(self) fn read_E_xmm<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8) -> Result<OperandSpec, DecodeError> { if modrm >= 0b11000000 { read_modrm_reg(instr, modrm, RegisterBank::X) } else { - read_M(bytes_iter, instr, modrm, length) + read_M(words, instr, modrm) } } #[allow(non_snake_case)] -pub(self) fn read_E_ymm<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +pub(self) fn read_E_ymm<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8) -> Result<OperandSpec, DecodeError> { if modrm >= 0b11000000 { read_modrm_reg(instr, modrm, RegisterBank::Y) } else { - read_M(bytes_iter, instr, modrm, length) + read_M(words, instr, modrm) } } #[allow(non_snake_case)] @@ -5459,7 +5458,7 @@ pub(self) fn read_E_vex<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut In if modrm >= 0b11000000 { read_modrm_reg(instr, modrm, bank) } else { - let res = read_M(bytes_iter, instr, modrm, length)?; + let res = read_M(bytes_iter, instr, modrm)?; if (modrm & 0b01_000_000) == 0b01_000_000 { instr.prefixes.apply_compressed_disp(true); } @@ -5474,24 +5473,20 @@ fn read_modrm_reg(instr: &mut Instruction, modrm: u8, reg_bank: RegisterBank) -> } #[allow(non_snake_case)] -fn read_sib<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +fn read_sib<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8) -> Result<OperandSpec, DecodeError> { let modbits = modrm >> 6; - let sibbyte = bytes_iter.next().ok_or(DecodeError::ExhaustedInput)?; - *length += 1; + let sibbyte = words.next().ok().ok_or(DecodeError::ExhaustedInput)?; let disp = if modbits == 0b00 { if (sibbyte & 7) == 0b101 { - *length += 4; - read_num(bytes_iter, 4)? as i32 + read_num(words, 4)? as i32 } else { 0 } } else if modbits == 0b01 { - *length += 1; - read_num(bytes_iter, 1)? as i8 as i32 + read_num(words, 1)? as i8 as i32 } else { - *length += 4; - read_num(bytes_iter, 4)? as i32 + read_num(words, 4)? as i32 }; instr.disp = disp as u32 as u64; @@ -5594,7 +5589,7 @@ fn read_sib<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, m } #[allow(non_snake_case)] -fn read_M<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, modrm: u8, length: &mut u8) -> Result<OperandSpec, DecodeError> { +fn read_M<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instr: &mut Instruction, modrm: u8) -> Result<OperandSpec, DecodeError> { let modbits = modrm >> 6; let mmm = modrm & 7; if instr.prefixes.rex().b() { @@ -5608,10 +5603,9 @@ fn read_M<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, mod instr.sib_index.num = 0; } let op_spec = if mmm == 4 { - return read_sib(bytes_iter, instr, modrm, length); + return read_sib(words, instr, modrm); } else if mmm == 5 && modbits == 0b00 { - *length += 4; - let disp = read_num(bytes_iter, 4)? as i32; + let disp = read_num(words, 4)? as i32; instr.modrm_mmm = if !instr.prefixes.address_size() { RegSpec::rip() } else { RegSpec::eip() }; if disp == 0 { @@ -5627,11 +5621,9 @@ fn read_M<T: Iterator<Item=u8>>(bytes_iter: &mut T, instr: &mut Instruction, mod OperandSpec::Deref } else { let disp = if modbits == 0b01 { - *length += 1; - read_num(bytes_iter, 1)? as i8 as i32 + read_num(words, 1)? as i8 as i32 } else { - *length += 4; - read_num(bytes_iter, 4)? as i32 + read_num(words, 4)? as i32 }; if disp == 0 { OperandSpec::Deref @@ -6958,8 +6950,8 @@ fn read_0f3a_opcode(opcode: u8, prefixes: &mut Prefixes) -> OpcodeRecord { }; } -fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction: &mut Instruction) -> Result<(), DecodeError> { - let mut length = 0u8; +fn read_instr<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(decoder: &InstDecoder, words: &mut T, instruction: &mut Instruction) -> Result<(), DecodeError> { + words.mark(); // use core::intrinsics::unlikely; let mut prefixes = Prefixes::new(0); @@ -6970,24 +6962,20 @@ fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, in instruction.mem_size = 0; let record: OpcodeRecord = loop { - let b = bytes_iter.next().ok_or(DecodeError::ExhaustedInput)?; - length += 1; - if length >= 15 { + let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?; + if words.offset() >= 15 { return Err(DecodeError::TooLong); } let record = OPCODES[b as usize]; if (b & 0xf0) == 0x40 { prefixes.rex_from(b); } else if b == 0x0f { - let b = bytes_iter.next().ok_or(DecodeError::ExhaustedInput)?; - length += 1; + let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?; if b == 0x38 { - let b = bytes_iter.next().ok_or(DecodeError::ExhaustedInput)?; - length += 1; + let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?; break read_0f38_opcode(b, &mut prefixes); } else if b == 0x3a { - let b = bytes_iter.next().ok_or(DecodeError::ExhaustedInput)?; - length += 1; + let b = words.next().ok().ok_or(DecodeError::ExhaustedInput)?; break read_0f3a_opcode(b, &mut prefixes); } else { break read_0f_opcode(b, &mut prefixes); @@ -7017,7 +7005,7 @@ fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, in return Err(DecodeError::InvalidPrefixes); } else { instruction.prefixes = prefixes; - vex::two_byte_vex(&mut bytes_iter, instruction, length)?; + vex::two_byte_vex(words, instruction)?; if decoder != &InstDecoder::default() { decoder.revise_instruction(instruction)?; @@ -7031,7 +7019,7 @@ fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, in return Err(DecodeError::InvalidPrefixes); } else { instruction.prefixes = prefixes; - vex::three_byte_vex(&mut bytes_iter, instruction, length)?; + vex::three_byte_vex(words, instruction)?; if decoder != &InstDecoder::default() { decoder.revise_instruction(instruction)?; } @@ -7044,7 +7032,7 @@ fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, in return Err(DecodeError::InvalidPrefixes); } else { instruction.prefixes = prefixes; - evex::read_evex(&mut bytes_iter, instruction, length, None)?; + evex::read_evex(words, instruction, length, None)?; if decoder != &InstDecoder::default() { decoder.revise_instruction(instruction)?; } @@ -7098,7 +7086,6 @@ fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, in if length > 15 { return Err(DecodeError::TooLong); } - instruction.length = length; if instruction.prefixes.lock() { if !LOCKABLE_INSTRUCTIONS.contains(&instruction.opcode) || !instruction.operands[0].is_memory() { @@ -7147,7 +7134,8 @@ fn read_instr<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, in OperandCode::ModRM_0x8f_Ev => 30 */ -fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction: &mut Instruction, operand_code: OperandCode, length: &mut u8) -> Result<(), DecodeError> { +#[inline(always)] +fn read_operands<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T, instruction: &mut Instruction, operand_code: OperandCode) -> Result<(), DecodeError> { instruction.operands[0] = OperandSpec::RegRRR; instruction.operand_count = 2; let operand_code = OperandCodeBuilder::from_bits(operand_code as u16); @@ -7192,7 +7180,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction.modrm_rrr = RegSpec::gp_from_parts(reg, instruction.prefixes.rex().b(), 1, instruction.prefixes.rex().present()); instruction.imm = - read_imm_unsigned(&mut bytes_iter, 1, length)?; + read_imm_unsigned(words, 1)?; instruction.operands[1] = OperandSpec::ImmU8; } 3 => { @@ -7208,7 +7196,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction.modrm_rrr = RegSpec::from_parts(reg, instruction.prefixes.rex().b(), bank); instruction.imm = - read_imm_ivq(&mut bytes_iter, opwidth, length)?; + read_imm_ivq(words, opwidth)?; instruction.operands[1] = match opwidth { 2 => OperandSpec::ImmI16, 4 => OperandSpec::ImmI32, @@ -7253,7 +7241,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, bank = RegisterBank::B; } }; - modrm = read_modrm(&mut bytes_iter, length)?; + modrm = read_modrm(words)?; instruction.modrm_rrr.bank = bank; instruction.modrm_rrr.num = ((modrm >> 3) & 7) + if instruction.prefixes.rex().r() { 0b1000 } else { 0 }; @@ -7267,14 +7255,14 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, } read_modrm_reg(instruction, modrm, bank)? } else { - read_M(&mut bytes_iter, instruction, modrm, length)? + read_M(words, instruction, modrm)? }; instruction.operands[1] = mem_oper; } if let Some((only_imm, immsz)) = operand_code.has_imm() { instruction.imm = - read_imm_signed(&mut bytes_iter, 1 << (immsz * 2), length)? as u64; + read_imm_signed(words, 1 << (immsz * 2))? as u64; if only_imm { if immsz == 0 { instruction.operands[0] = OperandSpec::ImmI8; @@ -7307,7 +7295,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, 2 => { instruction.operands[0] = mem_oper; let numwidth = if opwidth == 8 { 4 } else { opwidth }; - instruction.imm = read_imm_signed(&mut bytes_iter, numwidth, length)? as u64; + instruction.imm = read_imm_signed(words, numwidth)? as u64; instruction.opcode = base_opcode_map((modrm >> 3) & 7); instruction.operands[1] = match opwidth { 2 => OperandSpec::ImmI16, @@ -7322,16 +7310,16 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, if modrm == 0xf8 { if op == 3 { instruction.opcode = Opcode::XABORT; - instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; + instruction.imm = read_imm_signed(words, 1)? as u64; instruction.operands[0] = OperandSpec::ImmI8; instruction.operand_count = 1; return Ok(()); } else { instruction.opcode = Opcode::XBEGIN; instruction.imm = if opwidth == 2 { - read_imm_signed(&mut bytes_iter, 2, length)? as i16 as i64 as u64 + read_imm_signed(words, 2)? as i16 as i64 as u64 } else { - read_imm_signed(&mut bytes_iter, 4, length)? as i32 as i64 as u64 + read_imm_signed(words, 4)? as i32 as i64 as u64 }; instruction.operands[0] = OperandSpec::ImmI32; instruction.operand_count = 1; @@ -7346,7 +7334,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction.operands[0] = mem_oper; instruction.opcode = Opcode::MOV; let numwidth = if opwidth == 8 { 4 } else { opwidth }; - instruction.imm = read_imm_signed(&mut bytes_iter, numwidth, length)? as u64; + instruction.imm = read_imm_signed(words, numwidth)? as u64; instruction.operands[1] = match opwidth { 1 => OperandSpec::ImmI8, 2 => OperandSpec::ImmI16, @@ -7374,8 +7362,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, let num = match op { 5 | 6 => { - *length += 1; - read_num(&mut bytes_iter, 1)? + read_num(words, 1)? } _ => { // these are the _1 variants, everything else is unreachable @@ -7395,7 +7382,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, 0 | 1 => { instruction.opcode = Opcode::TEST; let numwidth = if opwidth == 8 { 4 } else { opwidth }; - instruction.imm = read_imm_signed(&mut bytes_iter, numwidth, length)? as u64; + instruction.imm = read_imm_signed(words, numwidth)? as u64; instruction.operands[1] = match opwidth { 1 => OperandSpec::ImmI8, 2 => OperandSpec::ImmI16, @@ -7473,9 +7460,9 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, } 15 => { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 1, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 1)?; instruction.modrm_rrr = RegSpec::gp_from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), opwidth, instruction.prefixes.rex().present()); if instruction.operands[1] != OperandSpec::RegMMM { @@ -7485,9 +7472,9 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, }, 16 => { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 2)?; instruction.modrm_rrr = RegSpec::gp_from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), opwidth, instruction.prefixes.rex().present()); if instruction.operands[1] != OperandSpec::RegMMM { @@ -7497,9 +7484,9 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, }, 17 => { let opwidth = 8; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 4 /* opwidth */, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 4 /* opwidth */)?; instruction.mem_size = 4; instruction.modrm_rrr = RegSpec::gp_from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), opwidth, instruction.prefixes.rex().present()); @@ -7542,14 +7529,13 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, } }, 22 => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_xmm(words, instruction, modrm)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 1; + read_num(words, 1)? as u8 as u64; if instruction.operands[1] != OperandSpec::RegMMM { if instruction.opcode == Opcode::CMPSS { instruction.mem_size = 4; @@ -7574,7 +7560,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction.modrm_rrr = RegSpec::gp_from_parts(0, false, opwidth, false); instruction.imm = - read_imm_signed(&mut bytes_iter, numwidth, length)? as u64; + read_imm_signed(words, numwidth)? as u64; instruction.operands[1] = match opwidth { 2 => OperandSpec::ImmI16, 4 => OperandSpec::ImmI32, @@ -7586,7 +7572,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, 25 => { let opwidth = imm_width_from_prefixes_64(SizeCode::vd, instruction.prefixes); instruction.imm = - read_imm_unsigned(&mut bytes_iter, opwidth, length)?; + read_imm_unsigned(words, opwidth)?; instruction.operands[0] = match opwidth { 2 => OperandSpec::ImmI16, 4 => OperandSpec::ImmI32, @@ -7654,7 +7640,7 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, }, _ => { let operand_code: OperandCode = unsafe { core::mem::transmute(operand_code.bits()) }; - unlikely_operands(decoder, bytes_iter, instruction, operand_code, mem_oper, length)?; + unlikely_operands(decoder, bytes_iter, instruction, operand_code, mem_oper)?; } }; } @@ -7664,14 +7650,13 @@ fn read_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter: T, instruction: &mut Instruction, operand_code: OperandCode, mem_oper: OperandSpec, length: &mut u8) -> Result<(), DecodeError> { match operand_code { OperandCode::G_E_mm_Ib => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E_mm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_mm(words, instruction, modrm)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, false, RegisterBank::MM); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 1; + read_num(words, 1)? as u8 as u64; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 8; } @@ -7679,14 +7664,13 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operand_count = 3; } OperandCode::G_Ev_xmm_Ib => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_xmm(words, instruction, modrm)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 1; + read_num(words, 1)? as u8 as u64; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = match instruction.opcode { Opcode::PEXTRB => 1, @@ -7704,12 +7688,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operand_count = 3; } OperandCode::PMOVX_E_G_xmm => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.operands[1] = OperandSpec::RegRRR; - instruction.operands[0] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_E_xmm(words, instruction, modrm)?; if instruction.operands[0] != OperandSpec::RegMMM { if [].contains(&instruction.opcode) { instruction.mem_size = 2; @@ -7723,12 +7707,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::PMOVX_G_E_xmm => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.operands[0] = OperandSpec::RegRRR; - instruction.operands[1] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_xmm(words, instruction, modrm)?; if instruction.operands[1] != OperandSpec::RegMMM { if [Opcode::PMOVSXBQ, Opcode::PMOVZXBQ].contains(&instruction.opcode) { instruction.mem_size = 2; @@ -7744,12 +7728,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::INV_Gv_M => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::Q); instruction.operands[0] = OperandSpec::RegRRR; - instruction.operands[1] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_M(words, instruction, modrm)?; if instruction.operands[1] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -7766,24 +7750,23 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::G_U_xmm_Ub => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_xmm(words, instruction, modrm)?; if instruction.operands[1] != OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::D); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 1; + read_num(words, 1)? as u8 as u64; instruction.operands[2] = OperandSpec::ImmU8; instruction.operand_count = 3; } OperandCode::ModRM_0xf20f78 => { instruction.opcode = Opcode::INSERTQ; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; if modrm < 0b11_000_000 { return Err(DecodeError::InvalidOperand); @@ -7796,10 +7779,9 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.modrm_mmm = RegSpec::from_parts(modrm & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; + read_num(words, 1)? as u8 as u64; instruction.disp = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 2; + read_num(words, 1)? as u8 as u64; instruction.operands[2] = OperandSpec::ImmU8; instruction.operands[3] = OperandSpec::ImmInDispField; instruction.operand_count = 4; @@ -7807,7 +7789,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter OperandCode::ModRM_0x660f78 => { instruction.opcode = Opcode::EXTRQ; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; if modrm < 0b11_000_000 { return Err(DecodeError::InvalidOperand); @@ -7821,24 +7803,22 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.modrm_mmm = RegSpec::from_parts(modrm & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; + read_num(words, 1)? as u8 as u64; instruction.disp = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 2; + read_num(words, 1)? as u8 as u64; instruction.operands[1] = OperandSpec::ImmU8; instruction.operands[2] = OperandSpec::ImmInDispField; instruction.operand_count = 3; } OperandCode::G_E_xmm_Ub => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_xmm(words, instruction, modrm)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::X); instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 1; + read_num(words, 1)? as u8 as u64; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 16; } @@ -7897,7 +7877,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); let numwidth = if opwidth == 8 { 4 } else { opwidth }; instruction.imm = - read_imm_signed(&mut bytes_iter, numwidth, length)? as u64; + read_imm_signed(words, numwidth)? as u64; instruction.operands[2] = match opwidth { 2 => OperandSpec::ImmI16, 4 => OperandSpec::ImmI32, @@ -7910,7 +7890,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operands[0] = mem_oper; instruction.operands[1] = OperandSpec::RegRRR; instruction.imm = - read_imm_signed(&mut bytes_iter, 1, length)? as u64; + read_imm_signed(words, 1)? as u64; instruction.operands[2] = OperandSpec::ImmI8; instruction.operand_count = 3; } @@ -7922,9 +7902,9 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operand_count = 3; } OperandCode::G_mm_Ew_Ib => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 4)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, false, RegisterBank::MM); if instruction.operands[1] == OperandSpec::RegMMM { @@ -7933,8 +7913,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.mem_size = 2; } instruction.imm = - read_num(&mut bytes_iter, 1)? as u8 as u64; - *length += 1; + read_num(words, 1)? as u8 as u64; instruction.operands[2] = OperandSpec::ImmI8; instruction.operand_count = 3; } @@ -7964,9 +7943,9 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter }, OperandCode::Gv_Ew_LSL => { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 2)?; // lsl is weird. the full register width is written, but only the low 16 bits are used. if instruction.operands[1] == OperandSpec::RegMMM { instruction.modrm_mmm.bank = RegisterBank::D; @@ -7979,9 +7958,9 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter }, OperandCode::Gdq_Ev => { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, opwidth)?; // `opwidth` can be 2, 4, or 8 here. if opwidth is 2, the first operand is a dword. // if opwidth is 4, both registers are dwords. and if opwidth is 8, both registers are // qword. @@ -8010,8 +7989,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter }; instruction.mem_size = opwidth; let addr_width = if instruction.prefixes.address_size() { 4 } else { 8 }; - let imm = read_num(&mut bytes_iter, addr_width)?; - *length += addr_width; + let imm = read_num(words, addr_width)?; instruction.modrm_rrr = RegSpec::gp_from_parts(0, instruction.prefixes.rex().b(), opwidth, instruction.prefixes.rex().present()); instruction.disp = imm; @@ -8035,8 +8013,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter }; instruction.mem_size = opwidth; let addr_width = if instruction.prefixes.address_size() { 4 } else { 8 }; - let imm = read_num(&mut bytes_iter, addr_width)?; - *length += addr_width; + let imm = read_num(words, addr_width)?; instruction.disp = imm; instruction.operands[0] = if instruction.prefixes.address_size() { OperandSpec::DispU32 @@ -8059,12 +8036,11 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } */ OperandCode::Iw_Ib => { - instruction.disp = read_num(&mut bytes_iter, 2)? as u64; - instruction.imm = read_num(&mut bytes_iter, 1)? as u64; + instruction.disp = read_num(words, 2)? as u64; + instruction.imm = read_num(words, 1)? as u64; instruction.operands[0] = OperandSpec::ImmInDispField; instruction.operands[1] = OperandSpec::ImmU8; instruction.operand_count = 2; - *length += 3; } OperandCode::Fw => { if instruction.prefixes.rex().w() { @@ -8078,10 +8054,10 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } OperandCode::Mdq_Gdq => { let opwidth = if instruction.prefixes.rex().w() { 8 } else { 4 }; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; instruction.operands[1] = instruction.operands[0]; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } else { @@ -8107,9 +8083,9 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOpcode); } - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 8, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 8)?; instruction.operands[1] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::Q); @@ -8123,12 +8099,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOpcode); } - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::Q); - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 8, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 8)?; instruction.operand_count = 2; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 8; @@ -8155,10 +8131,10 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter // // anyway, there are two operands, and the primary concern here is "what are they?". instruction.operand_count = 2; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; instruction.modrm_rrr = RegSpec::from_parts((modrm >> 3) & 7, instruction.prefixes.rex().r(), RegisterBank::X); - instruction.operands[1] = read_E_xmm(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_xmm(words, instruction, modrm)?; if instruction.prefixes.rex().w() { let op = instruction.operands[0]; instruction.operands[0] = instruction.operands[1]; @@ -8177,7 +8153,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::ModRM_0x0f0d => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 0b111; let opwidth = imm_width_from_prefixes_64(SizeCode::vq, instruction.prefixes); @@ -8190,7 +8166,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::NOP; } } - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] != OperandSpec::RegMMM { instruction.mem_size = 64; } @@ -8200,15 +8176,15 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter // 3dnow instructions are WILD, the opcode is encoded as an imm8 trailing the // instruction. - let modrm = read_modrm(&mut bytes_iter, length)?; - instruction.operands[1] = read_E_mm(&mut bytes_iter, instruction, modrm, length)?; + let modrm = read_modrm(words)?; + instruction.operands[1] = read_E_mm(words, instruction, modrm)?; instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec { bank: RegisterBank::MM, num: (modrm >> 3) & 7 }; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 8; } - let opcode = read_modrm(&mut bytes_iter, length)?; + let opcode = read_modrm(words)?; match opcode { 0x0c => { instruction.opcode = Opcode::PI2FW; @@ -8289,7 +8265,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } OperandCode::ModRM_0x0fc7 => { if instruction.prefixes.repnz() { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let is_reg = (modrm & 0xc0) == 0xc0; let r = (modrm >> 3) & 7; @@ -8308,7 +8284,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } instruction.operand_count = 1; let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } return Ok(()); } @@ -8319,7 +8295,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } if instruction.prefixes.operand_size() { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let is_reg = (modrm & 0xc0) == 0xc0; let r = (modrm >> 3) & 7; @@ -8338,13 +8314,13 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } instruction.operand_count = 1; let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } return Ok(()); } 6 => { instruction.opcode = Opcode::VMCLEAR; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] == OperandSpec::RegMMM { // this would be invalid as `vmclear`, so fall back to the parse as // 66-prefixed rdrand. this is a register operand, so just demote it to the @@ -8358,7 +8334,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Ok(()); } 7 => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] == OperandSpec::RegMMM { // this would be invalid as `vmclear`, so fall back to the parse as // 66-prefixed rdrand. this is a register operand, so just demote it to the @@ -8379,7 +8355,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter if instruction.prefixes.rep() { let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let is_reg = (modrm & 0xc0) == 0xc0; let r = (modrm >> 3) & 7; @@ -8398,12 +8374,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } instruction.operand_count = 1; let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } } 6 => { instruction.opcode = Opcode::VMXON; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] == OperandSpec::RegMMM { // invalid as `vmxon`, reg-form is `senduipi` instruction.opcode = Opcode::SENDUIPI; @@ -8416,7 +8392,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } 7 => { instruction.opcode = Opcode::RDPID; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] != OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -8429,7 +8405,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Ok(()); } - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let is_reg = (modrm & 0xc0) == 0xc0; let r = (modrm >> 3) & 0b111; @@ -8513,7 +8489,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = opcode; instruction.operand_count = 1; let opwidth = imm_width_from_prefixes_64(SizeCode::vqp, instruction.prefixes); - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; }, OperandCode::ModRM_0x0f71 => { if instruction.prefixes.rep() || instruction.prefixes.repnz() { @@ -8522,7 +8498,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operand_count = 2; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; if modrm & 0xc0 != 0xc0 { return Err(DecodeError::InvalidOperand); } @@ -8549,7 +8525,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.modrm_mmm = RegSpec { bank: RegisterBank::MM, num: modrm & 7 }; } instruction.operands[0] = OperandSpec::RegMMM; - instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; + instruction.imm = read_imm_signed(words, 1)? as u64; instruction.operands[1] = OperandSpec::ImmU8; }, OperandCode::ModRM_0x0f72 => { @@ -8559,7 +8535,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operand_count = 2; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; if modrm & 0xc0 != 0xc0 { return Err(DecodeError::InvalidOperand); } @@ -8586,7 +8562,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.modrm_mmm = RegSpec { bank: RegisterBank::MM, num: modrm & 7 }; } instruction.operands[0] = OperandSpec::RegMMM; - instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; + instruction.imm = read_imm_signed(words, 1)? as u64; instruction.operands[1] = OperandSpec::ImmU8; }, OperandCode::ModRM_0x0f73 => { @@ -8596,7 +8572,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operand_count = 2; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; if modrm & 0xc0 != 0xc0 { return Err(DecodeError::InvalidOperand); } @@ -8632,11 +8608,11 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.modrm_mmm = RegSpec { bank: RegisterBank::MM, num: modrm & 7 }; } instruction.operands[0] = OperandSpec::RegMMM; - instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; + instruction.imm = read_imm_signed(words, 1)? as u64; instruction.operands[1] = OperandSpec::ImmU8; }, OperandCode::ModRM_0xf30f38d8 => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 7; match r { 0b000 => { @@ -8644,7 +8620,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOperand); } instruction.opcode = Opcode::AESENCWIDE128KL; - instruction.operands[0] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_M(words, instruction, modrm)?; return Ok(()); } 0b001 => { @@ -8652,7 +8628,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOperand); } instruction.opcode = Opcode::AESDECWIDE128KL; - instruction.operands[0] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_M(words, instruction, modrm)?; return Ok(()); } 0b010 => { @@ -8660,7 +8636,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOperand); } instruction.opcode = Opcode::AESENCWIDE256KL; - instruction.operands[0] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_M(words, instruction, modrm)?; return Ok(()); } 0b011 => { @@ -8668,7 +8644,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOperand); } instruction.opcode = Opcode::AESDECWIDE256KL; - instruction.operands[0] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_M(words, instruction, modrm)?; return Ok(()); } _ => { @@ -8677,7 +8653,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::ModRM_0xf30f38dc => { - read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm, length)?; + read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm)?; if let OperandSpec::RegMMM = instruction.operands[1] { instruction.opcode = Opcode::LOADIWKEY; } else { @@ -8685,7 +8661,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::ModRM_0xf30f38dd => { - read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm, length)?; + read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm)?; if let OperandSpec::RegMMM = instruction.operands[1] { return Err(DecodeError::InvalidOperand); } else { @@ -8693,7 +8669,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::ModRM_0xf30f38de => { - read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm, length)?; + read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm)?; if let OperandSpec::RegMMM = instruction.operands[1] { return Err(DecodeError::InvalidOperand); } else { @@ -8701,7 +8677,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } OperandCode::ModRM_0xf30f38df => { - read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm, length)?; + read_operands(decoder, bytes_iter, instruction, OperandCode::G_E_xmm)?; if let OperandSpec::RegMMM = instruction.operands[1] { return Err(DecodeError::InvalidOperand); } else { @@ -8710,13 +8686,13 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } OperandCode::ModRM_0xf30f38fa => { instruction.opcode = Opcode::ENCODEKEY128; - read_operands(decoder, bytes_iter, instruction, OperandCode::G_U_xmm, length)?; + read_operands(decoder, bytes_iter, instruction, OperandCode::G_U_xmm)?; instruction.modrm_rrr.bank = RegisterBank::D; instruction.modrm_mmm.bank = RegisterBank::D; } OperandCode::ModRM_0xf30f38fb => { instruction.opcode = Opcode::ENCODEKEY256; - read_operands(decoder, bytes_iter, instruction, OperandCode::G_U_xmm, length)?; + read_operands(decoder, bytes_iter, instruction, OperandCode::G_U_xmm)?; instruction.modrm_rrr.bank = RegisterBank::D; instruction.modrm_mmm.bank = RegisterBank::D; } @@ -8816,8 +8792,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operands[2] = OperandSpec::ImmU8; instruction.operand_count = 3; instruction.imm = - read_num(&mut bytes_iter, 1)? as u64; - *length += 1; + read_num(words, 1)? as u64; instruction.modrm_rrr.bank = RegisterBank::X; if mem_oper == OperandSpec::RegMMM { instruction.modrm_mmm.bank = RegisterBank::D; @@ -8864,8 +8839,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.operands[2] = OperandSpec::ImmU8; instruction.operand_count = 3; instruction.imm = - read_num(&mut bytes_iter, 1)? as u64; - *length += 1; + read_num(words, 1)? as u64; instruction.modrm_rrr.bank = RegisterBank::D; if mem_oper == OperandSpec::RegMMM { instruction.modrm_mmm.bank = RegisterBank::MM; @@ -9027,7 +9001,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } OperandCode::Ew_Sw => { let opwidth = 2; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; // check r if ((modrm >> 3) & 7) > 5 { @@ -9046,12 +9020,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter RegSpec { bank: RegisterBank::W, num: modrm & 7}; instruction.operands[0] = OperandSpec::RegMMM; } else { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; instruction.mem_size = 2; } }, OperandCode::Sw_Ew => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; // check r if ((modrm >> 3) & 7) > 5 { @@ -9080,7 +9054,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter RegSpec { bank: RegisterBank::W, num: modrm & 7}; instruction.operands[1] = OperandSpec::RegMMM; } else { - instruction.operands[1] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_M(words, instruction, modrm)?; instruction.mem_size = 2; } }, @@ -9112,13 +9086,13 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } OperandCode::Iw => { instruction.imm = - read_imm_unsigned(&mut bytes_iter, 2, length)?; + read_imm_unsigned(words, 2)?; instruction.operands[0] = OperandSpec::ImmU16; instruction.operand_count = 1; } OperandCode::ModRM_0x0f00 => { instruction.operand_count = 1; - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 7; if r == 0 { instruction.opcode = Opcode::SLDT; @@ -9146,14 +9120,14 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } else { unreachable!("r <= 8"); } - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 2)?; if instruction.operands[0] != OperandSpec::RegMMM { instruction.mem_size = 2; } } OperandCode::ModRM_0x0f01 => { let opwidth = imm_width_from_prefixes_64(SizeCode::vq, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 7; if r == 0 { let mod_bits = modrm >> 6; @@ -9186,7 +9160,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::SGDT; instruction.operand_count = 1; instruction.mem_size = 63; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } } else if r == 1 { let mod_bits = modrm >> 6; @@ -9243,7 +9217,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::SIDT; instruction.operand_count = 1; instruction.mem_size = 63; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } } else if r == 2 { let mod_bits = modrm >> 6; @@ -9279,7 +9253,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::LGDT; instruction.operand_count = 1; instruction.mem_size = 63; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } } else if r == 3 { let mod_bits = modrm >> 6; @@ -9344,7 +9318,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::LIDT; instruction.operand_count = 1; instruction.mem_size = 63; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } } else if r == 4 { // TODO: this permits storing only to word-size registers @@ -9352,7 +9326,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::SMSW; instruction.operand_count = 1; instruction.mem_size = 2; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 2)?; } else if r == 5 { let mod_bits = modrm >> 6; if mod_bits != 0b11 { @@ -9360,7 +9334,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOpcode); } instruction.opcode = Opcode::RSTORSSP; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 8, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 8)?; instruction.mem_size = 8; instruction.operand_count = 1; return Ok(()); @@ -9464,7 +9438,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::LMSW; instruction.operand_count = 1; instruction.mem_size = 2; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 2)?; } else if r == 7 { let mod_bits = modrm >> 6; let m = modrm & 7; @@ -9514,14 +9488,14 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter instruction.opcode = Opcode::INVLPG; instruction.operand_count = 1; instruction.mem_size = 1; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; } } else { unreachable!("r <= 8"); } } OperandCode::ModRM_0x0fae => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 7; let m = modrm & 7; @@ -9540,7 +9514,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter return Err(DecodeError::InvalidOpcode); } }; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 1 /* opwidth */, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 1 /* opwidth */)?; instruction.mem_size = 64; instruction.operand_count = 1; } else { @@ -9554,7 +9528,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } }; let opwidth = if instruction.prefixes.rex().w() { 8 } else { 4 }; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; instruction.operand_count = 1; } @@ -9595,7 +9569,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } else { 4 }; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] != OperandSpec::RegMMM { instruction.mem_size = opwidth; } @@ -9676,7 +9650,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter match r { 6 => { instruction.opcode = Opcode::CLRSSBSY; - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 8, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 8)?; instruction.operand_count = 1; instruction.mem_size = 8; return Ok(()); @@ -9752,12 +9726,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter ][r as usize]; instruction.opcode = opcode; instruction.mem_size = mem_size; - instruction.operands[0] = read_M(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_M(words, instruction, modrm)?; } } OperandCode::ModRM_0x0fba => { let opwidth = imm_width_from_prefixes_64(SizeCode::vq, instruction.prefixes); - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 7; match r { 0 | 1 | 2 | 3 => { @@ -9781,12 +9755,12 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter } } - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, opwidth, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, opwidth)?; if instruction.operands[0] != OperandSpec::RegMMM { instruction.mem_size = opwidth; } - instruction.imm = read_imm_signed(&mut bytes_iter, 1, length)? as u64; + instruction.imm = read_imm_signed(words, 1)? as u64; instruction.operands[1] = OperandSpec::ImmI8; instruction.operand_count = 2; } @@ -9794,7 +9768,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter op @ OperandCode::Rq_Dq_0 | op @ OperandCode::Cq_Rq_0 | op @ OperandCode::Dq_Rq_0 => { - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let mut m = modrm & 7; let mut r = (modrm >> 3) & 7; if instruction.prefixes.rex().r() { @@ -9973,7 +9947,7 @@ fn unlikely_operands<T: Iterator<Item=u8>>(decoder: &InstDecoder, mut bytes_iter OperandCode::x87_dd | OperandCode::x87_de | OperandCode::x87_df => { - return decode_x87(decoder, bytes_iter, instruction, operand_code, length); + return decode_x87(decoder, bytes_iter, instruction, operand_code); } OperandCode::MOVDIR64B => { // at this point we've done a read as if it was Gv_M (`lea` operands). because the @@ -10043,7 +10017,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i } // every x87 instruction is conditional on rrr bits - let modrm = read_modrm(&mut bytes_iter, length)?; + let modrm = read_modrm(words)?; let r = (modrm >> 3) & 0b111; let (opcode, x87_operands) = match operand_code { @@ -10364,19 +10338,19 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i match x87_operands { OperandCodeX87::Est => { - instruction.operands[0] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_E_st(words, instruction, modrm)?; instruction.operand_count = 1; } OperandCodeX87::St_Est => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_st(words, instruction, modrm)?; instruction.operand_count = 2; } OperandCodeX87::St_Edst => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_st(words, instruction, modrm)?; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 4; } @@ -10385,7 +10359,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i OperandCodeX87::St_Eqst => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[1] = read_E_st(words, instruction, modrm)?; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 8; } @@ -10394,7 +10368,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i OperandCodeX87::St_Ew => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 2)?; if instruction.operands[1] != OperandSpec::RegMMM { instruction.mem_size = 2; } @@ -10403,7 +10377,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i OperandCodeX87::St_Mm => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 4)?; if instruction.operands[1] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10413,7 +10387,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i OperandCodeX87::St_Mq => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 4)?; if instruction.operands[1] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10423,7 +10397,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i OperandCodeX87::St_Md => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 4)?; if instruction.operands[1] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10433,7 +10407,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i OperandCodeX87::St_Mw => { instruction.operands[0] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); - instruction.operands[1] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[1] = read_E(words, instruction, modrm, 4)?; if instruction.operands[1] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10441,20 +10415,20 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i instruction.operand_count = 2; } OperandCodeX87::Ew => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 2, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 2)?; instruction.operand_count = 1; if instruction.operands[0] != OperandSpec::RegMMM { instruction.mem_size = 2; } } OperandCodeX87::Est_St => { - instruction.operands[0] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_E_st(words, instruction, modrm)?; instruction.operands[1] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); instruction.operand_count = 2; } OperandCodeX87::Edst_St => { - instruction.operands[0] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_E_st(words, instruction, modrm)?; instruction.operands[1] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); instruction.operand_count = 2; @@ -10463,7 +10437,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i } } OperandCodeX87::Eqst_St => { - instruction.operands[0] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_E_st(words, instruction, modrm)?; instruction.operands[1] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); instruction.operand_count = 2; @@ -10472,7 +10446,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i } } OperandCodeX87::Ed_St => { - instruction.operands[0] = read_E_st(&mut bytes_iter, instruction, modrm, length)?; + instruction.operands[0] = read_E_st(words, instruction, modrm)?; instruction.operands[1] = OperandSpec::RegRRR; instruction.modrm_rrr = RegSpec::st(0); if instruction.operands[0] != OperandSpec::RegMMM { @@ -10481,7 +10455,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i instruction.operand_count = 2; } OperandCodeX87::Mm_St => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 4)?; if instruction.operands[0] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10491,7 +10465,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i instruction.operand_count = 2; } OperandCodeX87::Mq_St => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 4)?; if instruction.operands[0] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10501,7 +10475,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i instruction.operand_count = 2; } OperandCodeX87::Md_St => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 4)?; if instruction.operands[0] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10511,7 +10485,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i instruction.operand_count = 2; } OperandCodeX87::Mw_St => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 4)?; if instruction.operands[0] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); } @@ -10521,7 +10495,7 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i instruction.operand_count = 2; } OperandCodeX87::Ex87S => { - instruction.operands[0] = read_E(&mut bytes_iter, instruction, modrm, 4, length)?; + instruction.operands[0] = read_E(words, instruction, modrm, 4)?; instruction.operand_count = 1; if instruction.operands[0] == OperandSpec::RegMMM { return Err(DecodeError::InvalidOperand); @@ -10536,39 +10510,24 @@ fn decode_x87<T: Iterator<Item=u8>>(_decoder: &InstDecoder, mut bytes_iter: T, i Ok(()) } -fn decode_one<'b, T: IntoIterator<Item=u8>>(decoder: &InstDecoder, bytes: T, instr: &'b mut Instruction) -> Result<(), DecodeError> { - let bytes_iter = bytes.into_iter(); - read_instr(decoder, bytes_iter, instr) -} - #[inline] -fn read_num<T: Iterator<Item=u8>>(bytes: &mut T, width: u8) -> Result<u64, DecodeError> { +fn read_num<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(bytes: &mut T, width: u8) -> Result<u64, DecodeError> { match width { - 1 => { bytes.next().map(|x| x as u64).ok_or(DecodeError::ExhaustedInput) } + 1 => { bytes.next().ok().ok_or(DecodeError::ExhaustedInput).map(|x| x as u64) } 2 => { - bytes.next().and_then(|b0| { - bytes.next().map(|b1| u16::from_le_bytes([b0, b1]) as u64) - }).ok_or(DecodeError::ExhaustedInput) + let mut buf = [0u8; 2]; + bytes.next_n(&mut buf).ok().ok_or(DecodeError::ExhaustedInput)?; + Ok(u16::from_le_bytes(buf) as u64) } 4 => { - bytes.next() - .and_then(|b0| bytes.next().map(|b1| (b0, b1))) - .and_then(|(b0, b1)| bytes.next().map(|b2| (b0, b1, b2))) - .and_then(|(b0, b1, b2)| bytes.next().map(|b3| u32::from_le_bytes([b0, b1, b2, b3]) as u64)) - .ok_or(DecodeError::ExhaustedInput) + let mut buf = [0u8; 4]; + bytes.next_n(&mut buf).ok().ok_or(DecodeError::ExhaustedInput)?; + Ok(u32::from_le_bytes(buf) as u64) } 8 => { - bytes.next() - .and_then(|b0| bytes.next().map(|b1| (b0, b1))) - .and_then(|(b0, b1)| bytes.next().map(|b2| (b0, b1, b2))) - .and_then(|(b0, b1, b2)| bytes.next().map(|b3| (b0, b1, b2, b3))) - .and_then(|(b0, b1, b2, b3)| bytes.next().map(|b4| (b0, b1, b2, b3, b4))) - .and_then(|(b0, b1, b2, b3, b4)| bytes.next().map(|b5| (b0, b1, b2, b3, b4, b5))) - .and_then(|(b0, b1, b2, b3, b4, b5)| bytes.next().map(|b6| (b0, b1, b2, b3, b4, b5, b6))) - .and_then(|(b0, b1, b2, b3, b4, b5, b6)| { - bytes.next().map(|b7| u64::from_le_bytes([b0, b1, b2, b3, b4, b5, b6, b7]) as u64) - }) - .ok_or(DecodeError::ExhaustedInput) + let mut buf = [0u8; 8]; + bytes.next_n(&mut buf).ok().ok_or(DecodeError::ExhaustedInput)?; + Ok(u64::from_le_bytes(buf)) } _ => { panic!("unsupported read size"); @@ -10577,18 +10536,15 @@ fn read_num<T: Iterator<Item=u8>>(bytes: &mut T, width: u8) -> Result<u64, Decod } #[inline] -fn read_imm_ivq<T: Iterator<Item=u8>>(bytes: &mut T, width: u8, length: &mut u8) -> Result<u64, DecodeError> { +fn read_imm_ivq<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(bytes: &mut T, width: u8) -> Result<u64, DecodeError> { match width { 2 => { - *length += 2; Ok(read_num(bytes, 2)? as u16 as u64) }, 4 => { - *length += 4; Ok(read_num(bytes, 4)? as u32 as u64) }, 8 => { - *length += 8; Ok(read_num(bytes, 8)? as u64) }, _ => { @@ -10598,26 +10554,20 @@ fn read_imm_ivq<T: Iterator<Item=u8>>(bytes: &mut T, width: u8, length: &mut u8) } #[inline(always)] -fn read_imm_signed<T: Iterator<Item=u8>>(bytes: &mut T, num_width: u8, length: &mut u8) -> Result<i64, DecodeError> { +fn read_imm_signed<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(bytes: &mut T, num_width: u8) -> Result<i64, DecodeError> { if num_width == 1 { - *length += 1; Ok(read_num(bytes, 1)? as i8 as i64) } else if num_width == 2 { - *length += 2; Ok(read_num(bytes, 2)? as i16 as i64) } else { - *length += 4; // this is for 4 and 8, the only values for num_width may be 1, 2, 4, and 8. Ok(read_num(bytes, 4)? as i32 as i64) } } #[inline] -fn read_imm_unsigned<T: Iterator<Item=u8>>(bytes: &mut T, width: u8, length: &mut u8) -> Result<u64, DecodeError> { - read_num(bytes, width).map(|res| { - *length += width; - res - }) +fn read_imm_unsigned<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(bytes: &mut T, width: u8) -> Result<u64, DecodeError> { + read_num(bytes, width) } #[inline] @@ -10647,6 +10597,6 @@ fn imm_width_from_prefixes_64(interpretation: SizeCode, prefixes: Prefixes) -> u } #[inline] -fn read_modrm<T: Iterator<Item=u8>>(bytes_iter: &mut T, length: &mut u8) -> Result<u8, DecodeError> { - bytes_iter.next().ok_or(DecodeError::ExhaustedInput).map(|b| { *length += 1; b }) +fn read_modrm<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpeax_arch::Arch>::Word>>(words: &mut T) -> Result<u8, DecodeError> { + words.next().ok().ok_or(DecodeError::ExhaustedInput) } |