HSDHDR Back to Index page
 
Prolog 
Control Block Contents 
   HSDHDR 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.

 
  HSDHDR Control Block Content Top of page
  




 HSDHDR DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      HSDHDR
0000    0 Signed       4 HSDDWLEN       Total HSD length in DWORDS
0004    4 Signed       4 HDSNNUM        Number of DSNT entries
0008    8 Signed       4 HDSNEOF        Offset to HDSNENT
000C   12 Signed       4 HRNGNUM        Number of RRNG entries
0010   16 Signed       4 HRNGEOF        Offset to HRNGENT
0014   20 Signed       4 HDBSEOF        Offset to HDBSTAT
          00000018       HSDHLEN        *-HSDHDR
 
 
  HSDHDR Storage Layout Top of page
  
          
*** HSDHDR - Control Block in HSDHDR
*
*     +---------------------------+---------------------------+
*   0 |         HSDDWLEN          |         HDSNNUM           |
*     +---------------------------+---------------------------+
*   8 |         HDSNEOF           |         HRNGNUM           |
*     +---------------------------+---------------------------+
*  10 |         HRNGEOF           |         HDBSEOF           |
*     +---------------------------+---------------------------+
*  18
*
*** HSDHDR - Control Block in HSDHDR
 
 
  HSDHDR Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
HDBSEOF        0014
HDSNEOF        0008
HDSNNUM        0004
HRNGEOF        0010
HRNGNUM        000C
HSDDWLEN       0000
HSDHLEN        0014 00000018
 
This information is based on z/VM 7.5.0 Last updated on 22 Jun 2026 at 11:17:21 EDT.
Copyright IBM Corporation, 1990, 2026