Struct ExecBuffer 

#[repr(C)]
pub struct ExecBuffer {
    pub gas_left: i64,
    pub syscall_no: u32,
    pub _pad: u32,
    pub a0: u64,
    pub a1: u64,
    pub a2: u64,
    pub a3: u64,
    pub a4: u64,
    pub a5: u64,
}

Buffer shared between runtime and executor for passing syscall data across the host function boundary.

The runtime allocates this on its stack and passes it via pointer. The host fills it in when returning from VirtT::run.

Fields

gas_left: i64

Gas remaining after the execution step.

syscall_no: u32

The syscall number (only meaningful when the status is ExecStatus::Syscall).

_pad: u32

Padding to maintain alignment after syscall_no.

a0: u64

Syscall register arguments a0-a5 (only meaningful for ExecStatus::Syscall).

a1: u64

a2: u64

a3: u64

a4: u64

a5: u64

Implementations

impl ExecBuffer

pub fn from_outcome(outcome: &ExecOutcome) -> Self

Populate this buffer from an ExecOutcome.

pub fn into_outcome(self, status: ExecStatus) -> ExecOutcome

Decode a status byte and this buffer into an ExecOutcome.

Trait Implementations

impl AsMut<[u8]> for ExecBuffer

fn as_mut(&mut self) -> &mut [u8]

Converts this type into a mutable reference of the (usually inferred) input type.

impl AsRef<[u8]> for ExecBuffer

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Debug for ExecBuffer

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

Formats the value using the given formatter.

impl Default for ExecBuffer

fn default() -> ExecBuffer

Returns the “default value” for a type.