Struct UserRegisters 

#[repr(C)]
pub struct UserRegisters {
    pub x: GeneralRegisters,
    pub elr: u64,
    pub spsr: u64,
    pub sp: u64,
}

Saved registers when a trap (exception) occurs.

Fields

x: GeneralRegisters

General-purpose registers (X0..X30).

elr: u64

Exception Link Register (ELR_EL1).

spsr: u64

Saved Process Status Register (SPSR_EL1).

sp: u64

Stack pointer at the time of the exception. Populated by SAVE_REGS as sp_before_sub = sp_after_sub + trapframe_size.

Note: This field is read-only (saved by SAVE_REGS for inspection only). The actual SP is restored by RESTORE_REGS via add sp, sp, #trapframe_size, not from this field. Modifying this value will NOT affect the actual SP after exception return.

Implementations

impl TrapFrame

pub fn interrupted_context(&self) -> InterruptedContext

Copies IRQ sampling values from this saved machine image.

pub const fn origin(&self) -> TrapOrigin

Returns the privilege domain represented by this register image.

pub const fn arg0(&self) -> usize

Gets the 0th syscall argument.

pub const fn set_arg0(&mut self, a0: usize)

Sets the 0th syscall argument.

pub const fn arg1(&self) -> usize

Gets the 1st syscall argument.

pub const fn set_arg1(&mut self, a1: usize)

Sets the 1st syscall argument.

pub const fn arg2(&self) -> usize

Gets the 2nd syscall argument.

pub const fn set_arg2(&mut self, a2: usize)

Sets the 2nd syscall argument.

pub const fn arg3(&self) -> usize

Gets the 3rd syscall argument.

pub const fn set_arg3(&mut self, a3: usize)

Sets the 3rd syscall argument.

pub const fn arg4(&self) -> usize

Gets the 4th syscall argument.

pub const fn set_arg4(&mut self, a4: usize)

Sets the 4th syscall argument.

pub const fn arg5(&self) -> usize

Gets the 5th syscall argument.

pub const fn set_arg5(&mut self, a5: usize)

Sets the 5th syscall argument.

pub const fn ip(&self) -> usize

Gets the instruction pointer.

pub const fn set_ip(&mut self, pc: usize)

Sets the instruction pointer.

pub const fn sysno(&self) -> usize

Get the syscall number.

pub const fn set_sysno(&mut self, sysno: usize)

Sets the syscall number.

pub const fn retval(&self) -> usize

Gets the return value register.

pub const fn set_retval(&mut self, r0: usize)

Sets the return value register.

pub const fn set_ra(&mut self, lr: usize)

Sets the return address.

pub fn backtrace_registers(&self) -> BacktraceRegisters

Copies the machine registers needed by a runtime stack unwinder.

Trait Implementations

impl Clone for TrapFrame

fn clone(&self) -> TrapFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TrapFrame

impl Debug for TrapFrame

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

Formats the value using the given formatter.

impl Default for TrapFrame

fn default() -> TrapFrame

Returns the “default value” for a type.