Perf Script Handler Arguments

Hi,

I am currently in the process of learning perfs python script support. Is there a way to find out, without trial and error, how much parameter a handler function has and what iformation the parameters are holding ? The first 7 (event_name,context,common_cpu,common_secs, common_nsecs,common_pid,common_comm ) are documented in the man-page and are allways the same (?) but what is with the remaining ones ? Syscalls__sys_enter_write for example needs 4 additional parameters: unkown0, unkown1, unkown2 and bytesToWrite.

Regards

D.C.