XITPL Back to Index page
 
Prolog 
Control Block Contents 
   XITPL DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  XITPL Prolog Top of page
 
 NAME       : HCPXITPL
 DESCRIPTION: Exit Plist
 DSECT      : XITPL
 FUNCTION   : The Exit Plist describes the standard fields in the
              CP Exit parameters supplied to the exit routines.
              Additional fields are expected to be appended by the
              various routines that build exit plists.
 LOCATED BY : R1 at invocation of the HCPXSERV CALL service.
 CREATED BY : Any CP routine that has an exit point defined.
 DELETED BY : The CP routine that created it.
 SERIALIZED : None
 RELOCATION CONSIDERATIONS : None
 NOTES      : Acqusition and release of the exit plist should use
              the label XITPL.   This is because the true plist
              (the addresses of data items) is embedded within the
              acquired storage.  This is done to facilitate use of
              BLOCKDEF and BLOCKMAP, as well as provide a simple
              way for one to extend the plist addresses at XITPLVAR
              without stomping on data that would come after the
              plist addresses if we didn't put the data at the
              front of the acquired storage.
              The 256 byte TRT table, XITPLTRT, must remain on a
              double word boundary, just so expectaions in user
              exit routines for a doubleword aligned work area
              are met.
              The last address in the true plist should have its
              high order bit turned on, just so expectaions in user
              exit routines for a variable length plist are met.
 
 
  XITPL Control Block Content Top of page
 

 XITPL DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure XITPL Exit Plist The user fields must remain at the front of the block 0000 0 Dbl-Word 8 XITPLUD1 Reserved for non-IBM use 0008 8 Dbl-Word 8 XITPLUD2 Reserved for non-IBM use 0010 16 Signed 4 XITPLUF1 Reserved for non-IBM use 0014 20 Signed 4 XITPLUF2 Reserved for non-IBM use 0018 24 Signed 2 XITPLUH1 Reserved for non-IBM use 001A 26 Signed 2 XITPLUH2 Reserved for non-IBM use 001C 28 Bitstring 1 XITPLUX1 Reserved for non-IBM use 001D 29 Bitstring 1 XITPLUX2 Reserved for non-IBM use 001E 30 Bitstring 1 XITPLUX3 Reserved for non-IBM use 001F 31 Bitstring 1 XITPLUX4 Reserved for non-IBM use 0020 32 Dbl-Word 8 * (0) Align XITPLTRT 0020 32 Bitstring 256 XITPLTRT 256 bytes for anything 00000120 XITPLHSZ *-XITPL Size of standard plist header Start of the true plist (list of addresses) 0120 288 Address 4 XITPLSTR (0) Start of the plist 0120 288 Address 4 XITPL@RS 'RESERVED' 0124 292 Address 4 XITPL@UW 'USERWORD' pointer 0128 296 Address 4 XITPL@TT 'TRTTABLE' pointer 012C 300 Address 4 XITPLVAR (0) Start of variable length data Addresses of fields specific to the exit. (Eventually) the end of the true plist (list of addresses) 012C 300 Address 4 XITPL@04 Address of first field specific to the exit. 0130 304 Address 4 XITPL@05 Address of second field specific to the exit. etc.
 
 
  XITPL Storage Layout Top of page
 
          
*** XITPL - Exit Plist
*
*     +-------------------------------------------------------+
*   0 |                       XITPLUD1                        |
*     +-------------------------------------------------------+
*   8 |                       XITPLUD2                        |
*     +---------------------------+---------------------------+
*  10 |         XITPLUF1          |         XITPLUF2          |
*     +-------------+-------------+------+------+------+------+
*  18 |  XITPLUH1   |  XITPLUH2   |:PLUX1|:PLUX2|:PLUX3|:PLUX4|
*     +-------------+-------------+------+------+------+------+
*  20 |                                                       |
*     =                       XITPLTRT                        =
*     |                                                       |
*     +---------------------------+---------------------------+
* 120 |         XITPL@RS          |         XITPL@UW          |
*     +---------------------------+---------------------------+
* 128 |         XITPL@TT          |
*     +---------------------------+
*
*** XITPL - Exit Plist
          
*** Overlay for XITPLVAR in XITPL
*
*                                 +---------------------------+
* 128 ...                     12C |         XITPL@04          |
*     +---------------------------+---------------------------+
* 130 |         XITPL@05          | 134
*     +---------------------------+
*
*** Overlay for XITPLVAR in XITPL
 
 
  XITPL Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
XITPL@RS       0120
XITPL@TT       0128
XITPL@UW       0124
XITPL@04       012C
XITPL@05       0130
XITPLHSZ       0020 00000120
XITPLSTR       0120
XITPLTRT       0020
XITPLUD1       0000
XITPLUD2       0008
XITPLUF1       0010
XITPLUF2       0014
XITPLUH1       0018
XITPLUH2       001A
XITPLUX1       001C
XITPLUX2       001D
XITPLUX3       001E
XITPLUX4       001F
XITPLVAR       012C
 
This information is based on z/VM 7.1.0 Last updated on 22 Jun 2018 at 11:54:10 EDT.
Copyright IBM Corporation, 1990, 2018