IBM SC34-6814-04 - Manual (Page 30)

* (ZERO = NO WORK AREA)
UEPGAL DS A ADDRESS OF GLOBAL WORK AREA LENGTH
UEPCRCA DS A ADDRESS OF CURRENT RETURN-CODE
UEPTCA DS A RESERVED
UEPCSA DS A RESERVED
UEPEPSA DS A ADDRESS OF REGISTER SAVE AREA
* FOR USE BY EXIT PROGRAM
UEPHMSA DS A ADDRESS OF SAVE AREA USED FOR
* HOST MODULE’S REGISTERS
UEPGIND DS A ADDRESS OF CALLER’S TASK INDICATORS
UEPSTACK DS A ADDRESS OF KERNEL STACK ENTRY
UEPXSTOR DS A ADDRESS OF STORAGE FOR XPI PARAMETERS
UEPTRACE DS A ADDRESS OF TRACE FLAG
UEPEXN
points to a 1-byte binary field whose contents identify the global user exit point
from which the exit program is being invoked. You need this information if your
exit program can be invoked from more than one exit point.
DFHUEXIT TYPE=EP generates a list of equated values that relate the exit
names (exitids) to the exit numbers used internally by CICS to identify the exits.
You should always use the exitids, because the exit numbers may change in
any future releases of CICS.
UEPGAA
points to the global work area that was provided for the exit program when it
was enabled. This is set to zero if no global work area is provided.
UEPGAL
points to a halfword that contains the length of the global work area.
UEPCRCA
points to a halfword that is to contain the return code value from the exit
program. When more than one program is called at a user exit, this field
contains (on entry to the second and subsequent programs) the return code
that was set by the previously invoked program.
For an example of how an exit program can set a different return code from that
returned by a previous exit program at the same exit point, see the code
snippet in “Invoking more than one exit program at a single exit” on page 13.
UEPTCA
points to fetch-protect storage. Use of this field results in an abend ASRD at
execution time.
UEPCSA
points to fetch-protect storage. Use of this field results in an abend ASRD at
execution time.
UEPEPSA
points to a save area in which the exit program should store its own registers
on entry. When the exit program is entered, register 13 is also pointing to this
area. The convention is to save registers 14, 15, 0–12 at offset 12 (decimal)
onward.
UEPHMSA
points to the save area containing the registers of the calling module. Values for
registers 14, 15, 0–13 are stored in this order from offset 12 (decimal) in this
area.
8 Customization Guide