IBM SC33-1683-02 - Manual (Page 81)

Dump domain exits XDUREQ, XDUREQC, XDUCLSE, and XDUOUT
There are four exits in the dump domain.
Exit XDUREQ
When invoked
Immediately before a system or transaction dump is taken.
Exit-specific parameters
UEPTRANID
Address of the 4-byte transaction ID.
UEPUSER
Address of the 8-byte user ID.
UEPTERM
Address of the 4-byte terminal ID.
UEPPROG
Address of the 8-byte application program name, or nulls if there is
no current application.
UEPDUMPC
Address of copy of the 8-byte dump code.
UEPABCDE
Address of a copy of the 8-byte Kernel error code in the format
xxx/yyyy. xxx denotes the 3-digit hexadecimal MVS completion code
(for example 0C1 or D37). If an MVS completion code is not
applicable, xxx is three hyphens. The 4-digit code yyyy is a user
abend code produced either by CICS or by another product on your
system. UEPABCDE is completed only for abend codes
corresponding to the following dump codes:
AP0001
SR0001
ASRA
ASRB
ASRD
Otherwise this field contains null characters.
UEPDUMPT
Address of the 1-byte dump-type identifier, which contains one of
the following values:
UEPDTRAN
A transaction dump was requested.
UEPDSYST
A system dump was requested.
Note: The dump-type identifier indicates the type of dump request
that was passed to the dump domain. It does not reflect any
modification that may have been made to the original
request by a user entry in the dump table.
dump domain exits
Chapter 1. Global user exit programs 49