use yaxpeax_x86::protected_mode::{InstDecoder, Operand, RegSpec}; use yaxpeax_x86::MemoryAccessSize; #[test] fn register_widths() { assert_eq!(Operand::Register(RegSpec::esp()).width(), Some(4)); assert_eq!(Operand::Register(RegSpec::sp()).width(), Some(2)); assert_eq!(Operand::Register(RegSpec::cl()).width(), Some(1)); assert_eq!(Operand::Register(RegSpec::ch()).width(), Some(1)); assert_eq!(Operand::Register(RegSpec::gs()).width(), Some(2)); } #[test] fn memory_widths() { // the register operand directly doesn't report a size - it comes from the `Instruction` for // which this is an operand. assert_eq!(Operand::RegDeref(RegSpec::esp()).width(), None); fn mem_size_of(data: &[u8]) -> MemoryAccessSize { let decoder = InstDecoder::default(); decoder.decode_slice(data).unwrap().mem_size().unwrap() } // and checking the memory size direcly reports correct names assert_eq!(mem_size_of(&[0x32, 0x00]).size_name(), "byte"); assert_eq!(mem_size_of(&[0x66, 0x33, 0x00]).size_name(), "word"); assert_eq!(mem_size_of(&[0x33, 0x00]).size_name(), "dword"); } #[test] fn test_implied_memory_width() { fn mem_size_of(data: &[u8]) -> Option { let decoder = InstDecoder::default(); decoder.decode_slice(data).unwrap().mem_size().unwrap().bytes_size() } // test push, pop, call, and ret assert_eq!(mem_size_of(&[0xc3]), Some(4)); assert_eq!(mem_size_of(&[0xe8, 0x11, 0x22, 0x33, 0x44]), Some(4)); assert_eq!(mem_size_of(&[0x50]), Some(4)); assert_eq!(mem_size_of(&[0x58]), Some(4)); assert_eq!(mem_size_of(&[0x66, 0x50]), Some(4)); assert_eq!(mem_size_of(&[0x66, 0x58]), Some(4)); assert_eq!(mem_size_of(&[0xff, 0xf0]), Some(4)); assert_eq!(mem_size_of(&[0x66, 0xff, 0xf0]), Some(2)); // unlike 64-bit mode, operand-size prefixed call and jump do have a different size: they read // two bytes. assert_eq!(mem_size_of(&[0x66, 0xff, 0x10]), Some(2)); assert_eq!(mem_size_of(&[0x66, 0xff, 0x20]), Some(2)); }