Struct x86_64::structures::idt::EntryOptions

#[repr(transparent)]
pub struct EntryOptions(_);

Represents the options field of an IDT entry.

Methods

impl EntryOptions

pub fn set_present(&mut self, present: bool) -> &mut Self

Set or reset the preset bit.

pub fn disable_interrupts(&mut self, disable: bool) -> &mut Self

Let the CPU disable hardware interrupts when the handler is invoked. By default, interrupts are disabled on handler invocation.

pub fn set_privilege_level(&mut self, dpl: PrivilegeLevel) -> &mut Self

Set the required privilege level (DPL) for invoking the handler. The DPL can be 0, 1, 2, or 3, the default is 0. If CPL < DPL, a general protection fault occurs.

This function panics for a DPL > 3.

pub unsafe fn set_stack_index(&mut self, index: u16) -> &mut Self

Assigns a Interrupt Stack Table (IST) stack to this handler. The CPU will then always switch to the specified stack before the handler is invoked. This allows kernels to recover from corrupt stack pointers (e.g., on kernel stack overflow).

An IST stack is specified by an IST index between 0 and 6 (inclusive). Using the same stack for multiple interrupts can be dangerous when nested interrupts are possible.

This function panics if the index is not in the range 0..7.

Safety

This function is unsafe because the caller must ensure that the passed stack index is valid and not used by other interrupts. Otherwise, memory safety violations are possible.

Trait Implementations

impl Debug for EntryOptions

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

Formats the value using the given formatter.

impl Clone for EntryOptions

fn clone(&self) -> EntryOptions

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for EntryOptions