XCTBK Back to Index page
 
Prolog 
Control Block Contents 
   XCTBK 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.


  XCTBK Prolog Top of page
  
 NAME       : HCPXCTBK
 DESCRIPTION: CP Exit Control Block
 DSECT      : XCTBK
 FUNCTION   : This control block contains information used to
              control the structure of XITBKs.
 LOCATED BY : SYSCM.SYSEXITS
 CREATED BY : HCPZXUIN
 DELETED BY : none
 RELOCATION CONSIDERATIONS : None
 
 
  XCTBK Control Block Content Top of page
  




 XCTBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      XCTBK          CP Exit Control Block
0000    0 Dbl-Word     8 XCTUSRD1       Reserved for non-IBM use
0008    8 Dbl-Word     8 XCTUSRD2       Reserved for non-IBM use
0010   16 Signed       4 XCTUSRF1       Reserved for non-IBM use
0014   20 Signed       4 XCTUSRF2       Reserved for non-IBM use
0018   24 Signed       2 XCTUSRH1       Reserved for non-IBM use
001A   26 Signed       2 XCTUSRH2       Reserved for non-IBM use
001C   28 Bitstring    1 XCTUSRX1       Reserved for non-IBM use
001D   29 Bitstring    1 XCTUSRX2       Reserved for non-IBM use
001E   30 Bitstring    1 XCTUSRX3       Reserved for non-IBM use
001F   31 Bitstring    1 XCTUSRX4       Reserved for non-IBM use
0020   32 Dbl-Word     8 XCTRDXLK (3)   Lock word to serialize additions
                                        to the XITBK radix tree.
0038   56 Dbl-Word     8 XCTEDCLK (3)   Lock word to serialize testing of
                                        the XITBKs with processing by
                                        ENABLE and DISABLE commands.
0050   80 Address      4 XCTRADIX       Address of XITBK tree structure
0054   84 Address      4 XCTBITMP       Address of XITBK tree bit map
0058   88 Dbl-Word     8 XCTCMPLK (3)   Lock word to serialize activities
                                        involving the chain of CMPBKs.
0070  112 Address      4 XCTCMPAD       Address of CMPBK chain
0074  116 Address      4 *              Reserved
0078  120 Dbl-Word     8 XCTDEDLK (3)   Lock word to serialize activities
                                        involving the chain of DEDBKs
0090  144 Address      4 XCTDEDAD       Address of DEDBK chain
0094  148 Address      4 *              Reserved
0098  152 Dbl-Word     8 XCTMSACT       Cummulative active time for all
                                        exits
00A0  160 Dbl-Word     8 XCT$END (0)    End on a d-word
 
 
  XCTBK Storage Layout Top of page
  
          
*** XCTBK - CP Exit Control Block
*
*     +-------------------------------------------------------+
*   0 |                       XCTUSRD1                        |
*     +-------------------------------------------------------+
*   8 |                       XCTUSRD2                        |
*     +---------------------------+---------------------------+
*  10 |         XCTUSRF1          |         XCTUSRF2          |
*     +-------------+-------------+------+------+------+------+
*  18 |  XCTUSRH1   |  XCTUSRH2   |:USRX1|:USRX2|:USRX3|:USRX4|
*     +-------------+-------------+------+------+------+------+
*  20 |                                                       |
*     =                       XCTRDXLK                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  38 |                                                       |
*     =                       XCTEDCLK                        =
*     |                                                       |
*     +---------------------------+---------------------------+
*  50 |         XCTRADIX          |         XCTBITMP          |
*     +---------------------------+---------------------------+
*  58 |                                                       |
*     =                       XCTCMPLK                        =
*     |                                                       |
*     +---------------------------+---------------------------+
*  70 |         XCTCMPAD          |///////////////////////////|
*     +---------------------------+---------------------------+
*  78 |                                                       |
*     =                       XCTDEDLK                        =
*     |                                                       |
*     +---------------------------+---------------------------+
*  90 |         XCTDEDAD          |///////////////////////////|
*     +---------------------------+---------------------------+
*  98 |                       XCTMSACT                        |
*     +-------------------------------------------------------+
*
*** XCTBK - CP Exit Control Block
 
 
  XCTBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
XCT$END        00A0
XCTBITMP       0054
XCTCMPAD       0070
XCTCMPLK       0058
XCTDEDAD       0090
XCTDEDLK       0078
XCTEDCLK       0038
XCTMSACT       0098
XCTRADIX       0050
XCTRDXLK       0020
XCTUSRD1       0000
XCTUSRD2       0008
XCTUSRF1       0010
XCTUSRF2       0014
XCTUSRH1       0018
XCTUSRH2       001A
XCTUSRX1       001C
XCTUSRX2       001D
XCTUSRX3       001E
XCTUSRX4       001F
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:31:49 EDT.
Copyright IBM Corporation, 1990, 2020