Struct KernelContext 

#[repr(C, align(16))]
pub struct KernelContext {
    pub sp: u64,
    pub ra: u64,
    pub s: [u64; 12],
    pub kernel_stack: Box<[Page]>,
}

Kernel context for RISC-V 64-bit

Contains callee-saved registers that need to be preserved across function calls and context switches in kernel mode, as well as the kernel stack information.

Fields

sp: u64

Stack pointer

ra: u64

Return address

s: [u64; 12]

Saved registers s0-s11 (callee-saved)

kernel_stack: Box<[Page]>

Kernel stack pages for this context (page-aligned, contiguous)

Implementations

impl KernelContext

pub fn new() -> Self

Create a new kernel context with kernel stack

Returns

A new KernelContext with allocated kernel stack ready for scheduling

pub fn get_kernel_stack_bottom_paddr(&self) -> u64

Get the bottom of the kernel stack

pub fn get_kernel_stack_memory_area_paddr(&self) -> MemoryArea

pub fn get_kernel_stack_paddr(&self) -> *const u8

pub fn set_entry_point(&mut self, entry_point: u64)

Set entry point for this context

Arguments

• entry_point - Function address to set as entry point

pub fn get_entry_point(&self) -> u64

Get entry point of this context

Returns

Function address of the entry point

pub fn set_sp(&mut self, sp_vaddr: u64)

pub fn get_trapframe(&mut self) -> &mut Trapframe

Get a mutable reference to the trapframe

The trapframe is located at the top of the kernel stack, reserved during context creation. This provides access to the user-space register state.

Returns

A mutable reference to the Trapframe, or None if no kernel stack is allocated

Trait Implementations

impl Clone for KernelContext

fn clone(&self) -> KernelContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KernelContext

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

Formats the value using the given formatter.