Function windows_sys::Wdk::System::SystemServices::ExGetFirmwareEnvironmentVariable

pub unsafe extern "system" fn ExGetFirmwareEnvironmentVariable(
    variablename: *const UNICODE_STRING,
    vendorguid: *const GUID,
    value: *mut c_void,
    valuelength: *mut u32,
    attributes: *mut u32,
) -> NTSTATUS