Struct solana_rbpf::ebpf::Helper

pub struct Helper {
    pub verifier: Option<HelperVerifier>,
    pub function: HelperFunction,
}

eBPF Helper pair

Includes both the helper function itself, but also an optional helper verification function that if present will be called first to validate the helper parameters. A verification function is not needed if the helper treats its arguments as values but if one of the arguments represent a pointer then that pointer must be verified by the verification function.

Note: native jitted programs do not have the ability to call the verification programs so all helpers provided to a jitted function must treat their arguments as values only.

Fields

verifier: Option<HelperVerifier>

Called first to verify the helper function's arguments

function: HelperFunction

Actual helper function that does the work