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error.rs
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error.rs
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/// Syscall errors
#[derive(Eq, PartialEq, Debug, Clone, Copy)]
pub enum SysError {
/// Index out of bound
IndexOutOfBound,
/// Field is missing for the target
ItemMissing,
/// Buffer length is not enough, error contains actual data length
LengthNotEnough(usize),
/// Data encoding error
Encoding,
/// Failed to wait. Its value is 5.
#[cfg(feature = "ckb2023")]
WaitFailure,
/// Invalid file descriptor. Its value is 6.
#[cfg(feature = "ckb2023")]
InvalidFd,
/// Reading from or writing to file descriptor failed due to other end closed. Its value is 7.
#[cfg(feature = "ckb2023")]
OtherEndClosed,
/// Max vms has been spawned. Its value is 8.
#[cfg(feature = "ckb2023")]
MaxVmsSpawned,
/// Max fds has been spawned. Its value is 9.
#[cfg(feature = "ckb2023")]
MaxFdsCreated,
/// Unknown syscall error number
Unknown(u64),
}
impl SysError {
pub(crate) fn build_syscall_result(
errno: u64,
load_len: usize,
actual_data_len: usize,
) -> Result<usize, SysError> {
use SysError::*;
match errno {
0 => {
if actual_data_len > load_len {
return Err(LengthNotEnough(actual_data_len));
}
Ok(actual_data_len)
}
1 => Err(IndexOutOfBound),
2 => Err(ItemMissing),
_ => Err(Unknown(errno)),
}
}
}