Struct TrapFrame 

#[repr(C)]
pub struct TrapFrame {
    pub regs: GeneralRegisters,
    pub prmd: usize,
    pub era: usize,
}

Saved registers when a trap (interrupt or exception) occurs.

Fields

regs: GeneralRegisters

All general registers.

prmd: usize

Pre-exception Mode Information

era: usize

Exception Return Address

Implementations

impl TrapFrame

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 sysno(&self) -> usize

Get the syscall number.

pub const fn set_sysno(&mut self, a7: usize)

Sets the syscall number.

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 sp(&self) -> usize

Gets the stack pointer.

pub const fn set_sp(&mut self, sp: usize)

Sets the stack pointer.

pub const fn retval(&self) -> usize

Gets the return value register.

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

Sets the return value register.

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

Sets the return address.

pub const fn tls(&self) -> usize

Gets the TLS area.

pub const fn set_tls(&mut self, tls_area: usize)

Sets the TLS area.

pub fn backtrace(&self) -> Backtrace

Unwind the stack and get the backtrace.

impl TrapFrame

pub unsafe fn emulate_unaligned(&mut self) -> Result<(), UnalignedError>

Emulates an unaligned memory access triggered by a trap.

Safety

This function uses raw pointers and inline assembly to handle unaligned memory accesses, so it must only be called in a valid trap context with a properly initialized TrapFrame.

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 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.

impl Copy for TrapFrame