Enum Trap 

#[repr(u32)]
pub enum Trap {
    None = 4_294_967_295,
    ExcInsnMisaligned = 0,
    ExcInsnAccessFault = 1,
    ExcIllegalInsn = 2,
    ExcBreakpoint = 3,
    ExcLoadAccessFault = 5,
    ExcStoreAccessFault = 7,
    ExcEcallU = 8,
    ExcEcallM = 11,
    IntTimer = 2_147_483_655,
}

Trap cause codes, as defined by the RISC-V privileged specification.

Trap::None is an internal sentinel meaning “no trap is pending”; it is never written to mcause. Interrupt causes have bit 31 set (e.g. Trap::IntTimer = 0x8000_0007).

Variants

None = 4_294_967_295

Sentinel — no trap pending.

ExcInsnMisaligned = 0

Instruction address misaligned.

ExcInsnAccessFault = 1

Instruction access fault (PC outside RAM).

ExcIllegalInsn = 2

Illegal instruction encoding.

ExcBreakpoint = 3

ebreak breakpoint.

ExcLoadAccessFault = 5

Load access fault (address outside RAM and not MMIO).

ExcStoreAccessFault = 7

Store/AMO access fault.

ExcEcallU = 8

ecall from U-mode.

ExcEcallM = 11

ecall from M-mode.

IntTimer = 2_147_483_655

Machine timer interrupt (MTIP — bit 7 of mip/mie).

Implementations

impl Trap

pub fn is_interrupt(self) -> bool

Returns true if this is an interrupt (bit 31 set in mcause).

pub fn to_mcause(self) -> u32

The value to write directly into mcause.

pub fn is_none(self) -> bool

Returns true if this is the no-trap sentinel.

Trait Implementations

impl Clone for Trap

fn clone(&self) -> Trap

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Trap

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

Formats the value using the given formatter.

impl PartialEq for Trap

fn eq(&self, other: &Trap) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Trap

impl Eq for Trap

impl StructuralPartialEq for Trap