function::returnval - Possible return value of probed function

       None

       Return the value of the register in which function values are typically returned. Can be used in probes
       where $return isn't available. This is only a guess of the actual return value and can be totally wrong.
       Normally only used in dwarfless probes.

       function::returnval - Possible return value of probed function

tapset::errno(3stap)

SystemTap Tapset Reference                         April 2024                         FUNCTION::RETURNVAL(3stap)

           returnval:long()