Struct GateDescriptor

#[repr(C)]
pub struct GateDescriptor {
    pub flags: GateDescriptorFlags,
    /* private fields */
}

Available on x86 or x86-64 only.

An entry in a segment descriptor table that points to an existing segment rather than defining a new one.

This includes:

• Call gates, which allow controlled access to routines defined in a code segment with a different priority level or word size.
• Interrupt and trap gates, which define handlers for interrupt vectors.
• Task gates, which support hardware task switching. These are not supported in 64-bit mode.

Fields

flags: GateDescriptorFlags

Common gate descriptor settings.

Implementations

impl GateDescriptor

pub const fn new() -> Self

Create a zero-initialized descriptor

pub fn selector(self) -> Selector

Selector that points to the code or task state segment to be accessed through this gate.

For call, interrupt, and trap gates, this points to the code segment that contains the routine to be executed. For task gates, this points to a task state segment representing the task to activate.

pub fn set_selector(&mut self, selector: Selector)

Update the selector pointing to the segment to be accessed through this gate.

pub fn entry_point_offset(self) -> usize

Offset of the entry point in code segment referenced by selector.

Only applies to call, interrupt, and trap gates.

pub fn set_entry_point_offset(&mut self, offset: usize)

Update the offset of the entry point within the referenced code segment.

Trait Implementations

impl Clone for GateDescriptor

fn clone(&self) -> GateDescriptor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for GateDescriptor

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

Formats the value using the given formatter.

impl Default for GateDescriptor

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for GateDescriptor

fn eq(&self, other: &GateDescriptor) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for GateDescriptor

impl Eq for GateDescriptor

impl StructuralPartialEq for GateDescriptor