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 7.3.0 Last updated on 22 Jun 2022 at 15:58:07 EDT.
Copyright IBM Corporation, 1990, 2022