LIBSECT | Back to Index page

| Prolog Control Block Contents LIBSECT 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.

LIBSECT Prolog | Top of page

     NAME       : LIB
     DESCRIPTION: CMS PDS Header
     DSECT      : LIBSECT
     FUNCTION   : LIBSECT keeps track of the total library size
                  and the address of the CMS PDS directory.

LIBSECT Control Block Content | Top of page

     LIBSECT DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      LIBSECT        CMS PDS Header
    0000    0 Character    6 LIBIDENT       CMS PDS LIB IDENTIFIER
    0006    6 Signed       2 *              RESERVED
    0008    8 Signed       4 LIBDIRSZ       TOTAL DIRECTORY SIZE IN BYTES
    000C   12 Signed       4 LIBDIR         DIRECTORY ADDRESS AS FULLWORD
                                            EXTENDED ITEM NO.
    0010   16 Bitstring   64 *              RESERVED
              00000050       LIBIDSIZ       *-LIBSECT LENGTH OF PDS
                                            IDENTIFIER
           MAPPING OF SCP FORMAT HEADER ENTRY
              00000006       LIBDIRX        LIBSECT+6,2 SCP HALFWORD DIR.
                                            ITEM NO.

LIBSECT Storage Layout | Top of page

    *** LIBSECT - CMS PDS Header
    *
    *     +-----------------------------------------+-------------+
    *   0 |                LIBIDENT                 |/////////////|
    *     +---------------------------+-------------+-------------+
    *   8 |         LIBDIRSZ          |          LIBDIR           |
    *     +---------------------------+---------------------------+
    *  10 |///////////////////////////////////////////////////////|
    *     =///////////////////////////////////////////////////////=
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *  50
    *
    *** LIBSECT - CMS PDS Header

LIBSECT Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    LIBDIR         000C
    LIBDIRSZ       0008
    LIBDIRX        0010 00000006
    LIBIDENT       0000
    LIBIDSIZ       0010 00000050

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:36:33 EDT.
Copyright IBM Corporation, 1990, 2020