Struct X86_64Context 

#[repr(C)]
pub struct X86_64Context {

    pub r15: u64,
    pub r14: u64,
    pub r13: u64,
    pub r12: u64,
    pub r11: u64,
    pub r10: u64,
    pub r9: u64,
    pub r8: u64,
    pub rdi: u64,
    pub rsi: u64,
    pub rbp: u64,
    pub rbx: u64,
    pub rdx: u64,
    pub rcx: u64,
    pub rax: u64,
    pub rsp: u64,
    pub rip: u64,
    pub rflags: u64,
    pub cs: u16,
    pub ss: u16,
    pub ds: u16,
    pub es: u16,
    pub fs: u16,
    pub gs: u16,
    pub cr3: u64,
    pub fpu_state: *mut FpuState,
    pub tls_base: u64,
}

x86_64 CPU context

Fields

r15: u64

General purpose registers

r14: u64

r13: u64

r12: u64

r11: u64

r10: u64

r9: u64

r8: u64

rdi: u64

rsi: u64

rbp: u64

rbx: u64

rdx: u64

rcx: u64

rax: u64

rsp: u64

Stack pointer

rip: u64

Instruction pointer

rflags: u64

CPU flags

cs: u16

Segment registers

ss: u16

ds: u16

es: u16

fs: u16

gs: u16

cr3: u64

Control registers

fpu_state: *mut FpuState

Floating point state pointer

tls_base: u64

TLS base (FS base for user)

Implementations

impl X86_64Context

pub fn new(entry_point: usize, stack_pointer: usize) -> Self

Create new context for a task

pub fn new_user(entry_point: usize, stack_pointer: usize) -> Self

Create a user-mode context for a process.

Uses Ring 3 segment selectors (CS=0x33, SS/DS/ES=0x2B) and enables interrupts (RFLAGS IF bit). The CR3 is set to the current page table so the process initially shares the kernel’s address space (with user-accessible mappings added separately).

Trait Implementations

impl Clone for X86_64Context

fn clone(&self) -> X86_64Context

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for X86_64Context

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

Formats the value using the given formatter.

impl Default for X86_64Context

fn default() -> Self

Returns the “default value” for a type.

impl ThreadContext for X86_64Context

fn new() -> Self

Create a new empty context

fn init( &mut self, entry_point: usize, stack_pointer: usize, _kernel_stack: usize, )

Initialize context for a new thread

fn get_instruction_pointer(&self) -> usize

Get instruction pointer

fn set_instruction_pointer(&mut self, ip: usize)

Set instruction pointer

fn get_stack_pointer(&self) -> usize

Get stack pointer

fn set_stack_pointer(&mut self, sp: usize)

Set stack pointer

fn set_tls_base(&mut self, base: u64)

Set user TLS base for this context (FS/TP).

fn tls_base(&self) -> u64

Get user TLS base stored in this context.

fn get_kernel_stack(&self) -> usize

Get kernel stack pointer

fn set_kernel_stack(&mut self, sp: usize)

Set kernel stack pointer

fn set_return_value(&mut self, value: usize)

Set return value (for syscalls, fork, etc.)

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

Clone the context

fn to_task_context(&self) -> TaskContext

Convert to scheduler’s TaskContext

impl Send for X86_64Context

impl Sync for X86_64Context