The extended error descriptor (EED) passes error information between
RTM1 and RTM2 and also between successive schedules of RTM1. The EED
is described in
z/OS® MVS™ Data Areas in
http://www.ibm.com/systems/z/os/zos/bkserv/. It is pointed
to by:
- RT1WEED (RT1W +X'3C')
- TCBRTM12 (TCB+X'104')
- RTM2 SVRB +X'7C' The EED pointed to by RTM's SVRB is
not always valid, because RTM2 releases it early in its processing.
Important EED fields are:
- EEDFWRDP (EED+0)
- Either the pointer to the next EED on the chain, or zero
- EEDID (EED+4)
- Description of contents of the rest of the EED:
- BYTE 0
- = 1 - register and PSW information EED
-
- = 2 - dump parameters EED
-
- = 3 - machine check handler EED
-
- = 4 - reserved
-
- = 5 - dump storage range EED
-
- = 6 - subpool list EED
-
- = 7 - original error data EED (includes errorid)