Struct yaxpeax_x86::MemoryAccessSize

pub struct MemoryAccessSize { /* fields omitted */ }

Implementations

impl MemoryAccessSize

pub fn bytes_size(&self) -> Option<u8>

return the number of bytes referenced by this memory access.

if the number of bytes cannot be confidently known by the instruction in isolation (as is the case for xsave/xrstor-style “operate on all processor state” instructions), this function will return None.

pub fn size_name(&self) -> &'static str

a human-friendly label for the number of bytes this memory access references.

there are some differences from size names that may be expected elsewhere; yaxpeax-x86 prefers to use consistent names for a width even if the way those bytes are used varies.

the sizes yaxpeax-x86 knows are as follows: | size (bytes) | name | |–––––––|————| | 1 | byte | | 2 | word | | 4 | dword | | 6 | far | | 8 | qword | | 10 | mword | | 16 | xmmword | | 32 | ymmword | | 64 | zmmword | | variable | ptr |

“mword” refers to an mmx-sized access - 80 bits, or 10 bytes. mword is also used for 64-bit far calls, because they reference a contiguous ten bytes; two bytes of segment selector and eight bytes of address.

“variable” accesses access a number of bytes dependent on the physical processor and its operating mode. this is particularly relevant for xsave/xrstor-style instructions.

Trait Implementations

impl Display for MemoryAccessSize

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.