1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

#[derive(Copy, Clone)]
#[repr(C)]
pub struct TaskContext {
    ra: usize,
    sp: usize,
    s: [usize; 12],
}

impl TaskContext {
    pub fn zero_init() -> Self {
        Self {
            ra: 0,
            sp: 0,
            s: [0; 12],
        }
    }
    pub fn goto_restore(kstack_ptr: usize) -> Self {
        extern "C" {
            fn __restore();
        }
        Self {
            ra: __restore as usize,
            sp: kstack_ptr,
            s: [0; 12],
        }
    }
}