Struct goblin::mach::load_command::TwolevelHint

#[repr(C)]
pub struct TwolevelHint {
    pub isub_image: u64,
    pub itoc: [u8; 24],
}

The entries in the two-level namespace lookup hints table are twolevel_hint structs. These provide hints to the dynamic link editor where to start looking for an undefined symbol in a two-level namespace image. The isub_image field is an index into the sub-images (sub-frameworks and sub-umbrellas list) that made up the two-level image that the undefined symbol was found in when it was built by the static link editor. If isub-image is 0 the the symbol is expected to be defined in library and not in the sub-images. If isub-image is non-zero it is an index into the array of sub-images for the umbrella with the first index in the sub-images being

1. The array of sub-images is the ordered list of sub-images of the umbrella that would be searched for a symbol that has the umbrella recorded as its primary library. The table of contents index is an index into the library's table of contents. This is used as the starting point of the binary search or a directed linear search.

Fields

isub_image: u64

index into the sub images

itoc: [u8; 24]

24 bit field index into the table of contents

Trait Implementations

impl Copy for TwolevelHint

impl Clone for TwolevelHint

fn clone(&self) -> TwolevelHint

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TwolevelHint

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

Formats the value using the given formatter.

impl FromCtx<Endian, [u8]> for TwolevelHint

fn from_ctx(src: &[u8], ctx: Endian) -> Self

impl<'a> TryFromCtx<'a, Endian, [u8]> for TwolevelHint where
    TwolevelHint: 'a, 

type Error = Error

type Size = usize

fn try_from_ctx(
    src: &'a [u8],
    ctx: Endian
) -> Result<(Self, Self::Size), Self::Error>

impl<'a> IntoCtx<Endian, [u8]> for &'a TwolevelHint

fn into_ctx(self, dst: &mut [u8], ctx: Endian)

impl IntoCtx<Endian, [u8]> for TwolevelHint

fn into_ctx(self, dst: &mut [u8], ctx: Endian)

impl<'a> TryIntoCtx<Endian, [u8]> for &'a TwolevelHint

type Error = Error

type Size = usize

fn try_into_ctx(
    self,
    dst: &mut [u8],
    ctx: Endian
) -> Result<Self::Size, Self::Error>

impl TryIntoCtx<Endian, [u8]> for TwolevelHint

type Error = Error

type Size = usize

fn try_into_ctx(
    self,
    dst: &mut [u8],
    ctx: Endian
) -> Result<Self::Size, Self::Error>

impl SizeWith<Endian> for TwolevelHint

type Units = usize

fn size_with(ctx: &Endian) -> Self::Units