Selectors

veridian_kernel::arch::x86_64::gdt

Struct Selectors

pub struct Selectors {
    pub code_selector: SegmentSelector,
    pub data_selector: SegmentSelector,
    pub tss_selector: SegmentSelector,
    pub user_data_selector: SegmentSelector,
    pub user_code_selector: SegmentSelector,
}

Expand description

GDT segment selectors for kernel and user mode.

Layout:

0x00: Null descriptor
0x08: Kernel code segment (Ring 0)
0x10: Kernel data segment (Ring 0)
0x18: TSS (occupies 2 entries, 0x18-0x20)
0x28: User data segment (Ring 3, selector 0x2B with RPL)
0x30: User code segment (Ring 3, selector 0x33 with RPL)

The user data/code order matches SYSRET expectations: SYSRET computes SS = STAR[63:48]+8, CS = STAR[63:48]+16.

Fields§

§code_selector: SegmentSelector§data_selector: SegmentSelector§tss_selector: SegmentSelector§user_data_selector: SegmentSelector§user_code_selector: SegmentSelector

Auto Trait Implementations§

impl Freeze for Selectors

impl RefUnwindSafe for Selectors

impl Send for Selectors

impl Sync for Selectors

impl Unpin for Selectors

impl UnwindSafe for Selectors

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

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where T: ?Sized,

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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.