PSDS as parm

Is it possible to pass the PSDS as a parm? If so can anyone tell me how
I would map out the *PROC, *STATUS, *ROUTINE, *PARMS subfields?

 

I was hoping I could do something like this

 

D MyPSDS      SDS

(pretend I have all of the subfields defined)

 

D ErrProto        PR                     10I 0

D   ErrDS                                           Like(MYPSDS)

 

D RC               S                        10I 0

 

/Free

 

   RC = ErrProto(MYPSDS);

 

/End-Free

 

 

P ErrProto               B

 

D ErrProto                PI

D   ErrDS                                 353A

 

D  ProcDS                                    *       Inz(%addr(ErrDS))

 

D   ProcDS_1          DS                          Based(ProcDS) 

 

This is about as far as I got when I realized I don't know if I can map
out the fields I listed above. 

Any ideas?