diff options
Diffstat (limited to 'src/real_mode/mod.rs')
| -rw-r--r-- | src/real_mode/mod.rs | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/src/real_mode/mod.rs b/src/real_mode/mod.rs index fbfc687..548c42e 100644 --- a/src/real_mode/mod.rs +++ b/src/real_mode/mod.rs @@ -7236,6 +7236,7 @@ fn read_operands<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpe }; instruction.regs[0] = RegSpec::from_parts(reg, bank); + instruction.mem_size = 2; instruction.operand_count = 1; } 1 => { @@ -7329,6 +7330,9 @@ fn read_operands<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpe if immsz == 0 { instruction.operands[0] = OperandSpec::ImmI8; } else { + if instruction.opcode == Opcode::CALL { + instruction.mem_size = 2; + } instruction.operands[0] = OperandSpec::ImmI32; } instruction.operand_count = 1; @@ -7506,11 +7510,19 @@ fn read_operands<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpe if instruction.operands[0] == OperandSpec::RegMMM { // in real mode, `xed` reports that operand-size does in fact override from word to // dword. unlikely larger modes, operand-size can't shrink the call operand down. - if opcode == Opcode::CALLF || opcode == Opcode::JMPF { + if opcode == Opcode::CALL { + instruction.mem_size = 2; + } else if opcode == Opcode::CALLF || opcode == Opcode::JMPF { return Err(DecodeError::InvalidOperand); } } else { - if opcode == Opcode::CALL || opcode == Opcode::JMP || opcode == Opcode::PUSH || opcode == Opcode::POP { + if opcode == Opcode::CALL || opcode == Opcode::JMP { + if instruction.prefixes.operand_size() { + instruction.mem_size = 4; + } else { + instruction.mem_size = 2; + } + } else if opcode == Opcode::PUSH || opcode == Opcode::POP { if instruction.prefixes.operand_size() { instruction.mem_size = 4; } else { @@ -7658,6 +7670,14 @@ fn read_operands<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as yaxpe instruction.operand_count = 1; } 28 => { + if instruction.opcode == Opcode::Invalid { + return Err(DecodeError::InvalidOpcode); + } + if instruction.opcode == Opcode::RETURN { + instruction.mem_size = 2; + } else { + instruction.mem_size = 4; + } instruction.operands[0] = OperandSpec::Nothing; instruction.operand_count = 0; return Ok(()); @@ -9140,6 +9160,11 @@ fn unlikely_operands<T: Reader<<Arch as yaxpeax_arch::Arch>::Address, <Arch as y instruction.imm = read_imm_unsigned(words, 2)?; instruction.operands[0] = OperandSpec::ImmU16; + if instruction.opcode == Opcode::RETURN { + instruction.mem_size = 2; + } else { + instruction.mem_size = 4; + } instruction.operand_count = 1; } OperandCode::ModRM_0x0f00 => { |