Macro define_utee_syscalls 

macro_rules! define_utee_syscalls {
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident() );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty, $c:ident : $ct:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty, $c:ident : $ct:ty, $d:ident : $dt:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty, $c:ident : $ct:ty, $d:ident : $dt:ty, $e:ident : $et:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty, $c:ident : $ct:ty, $d:ident : $dt:ty, $e:ident : $et:ty, $f:ident : $ft:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty, $c:ident : $ct:ty, $d:ident : $dt:ty, $e:ident : $et:ty, $f:ident : $ft:ty, $g:ident : $gt:ty) );* $(;)? ) => { ... };
    ( $( $id_name:ident = $id_val:expr => fn $func_name:ident($a:ident : $at:ty, $b:ident : $bt:ty, $c:ident : $ct:ty, $d:ident : $dt:ty, $e:ident : $et:ty, $f:ident : $ft:ty, $g:ident : $gt:ty, $h:ident : $ht:ty) );* $(;)? ) => { ... };
}