Struct Context

#[repr(C)]
pub(super) struct Context {
    pub base: Base,
    pub trap_rsp: *mut u8,
    pub user_rsp: usize,
    phantom: PhantomPinned,
}

Extended Base for x86-64.

Fields

base: Base

trap_rsp: *mut u8

user_rsp: usize

phantom: PhantomPinned

Implementations

impl Context

pub fn new(base: Base, arch: &ArchConfig) -> Self

pub unsafe fn activate(self: Pin<&mut Self>)

Set kernel GS segment register to self.

At a glance this may looks incorrect due to 0xc0000102 is KERNEL_GS_BAS according to the docs. The problem is the CPU always use the value from 0xc0000101 regardless the current privilege level. That means KERNEL_GS_BAS is the name when the CPU currently on the user space.

This also set user-mode FS and GS to null.

pub unsafe fn load_static_ptr<const O: usize, T>() -> *const T

pub unsafe fn load_ptr<const O: usize, T>() -> *const T

pub unsafe fn load_volatile_usize<const O: usize>() -> usize