HDRBK Back to Index page
 
Prolog 
Control Block Contents 
   HDRBK 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.


  HDRBK Prolog Top of page
 
 NAME       : DMSHDRBK
 DESCRIPTION: Free storage element header
 DSECT      : HDRBK
 FUNCTION   : Mapping macro which maps unallocated
              pieces of storage within a page.
 
 
  HDRBK Control Block Content Top of page
 

 HDRBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure HDRBK Free storage element header 0000 0 Signed 4 HDRFORWD Pointer to next piece of free storage 0004 4 Signed 4 HDRLEN Size of this piece of free storage
 
 
  HDRBK Storage Layout Top of page
 
          
*** HDRBK - Free storage element header
*
*     +---------------------------+---------------------------+
*   0 |         HDRFORWD          |          HDRLEN           |
*     +---------------------------+---------------------------+
*   8
*
*** HDRBK - Free storage element header
 
 
  HDRBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
HDRFORWD       0000
HDRLEN         0004
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 16:01:06 EDT.
Copyright IBM Corporation, 1990, 2022