Struct hal_x86_64::segment::Gdt

pub struct Gdt<const SIZE: usize = 8> { /* private fields */ }

A Global Descriptor Table (GDT).

This can have up to 65535 entries, but in 64-bit mode, you don’t need most of those (since you can’t do real segmentation), so it defaults to 8.

Refer to section 3.5.1 in Vol. 3A of the Intel® 64 and IA-32 Architectures Developer’s Manual for details.

Implementations

impl<const SIZE: usize> Gdt<SIZE>

pub fn load(&'static self)

Sets self as the current GDT.

This method is safe, because the 'static bound on self ensures that the pointed GDT doesn’t go away while it’s active. Therefore, this method is a safe wrapper around the lgdt CPU instruction

pub const fn new() -> Self

Returns a new Gdt with all entries zeroed.

pub fn add_segment(&mut self, segment: Descriptor) -> Selector

pub fn add_sys_segment(&mut self, segment: SystemDescriptor) -> Selector

Trait Implementations

impl<const SIZE: usize> Clone for Gdt<SIZE>

fn clone(&self) -> Gdt<SIZE>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<const SIZE: usize> Debug for Gdt<SIZE>

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

Formats the value using the given formatter.