SSPBK | Back to Index page

| Prolog Control Block Contents SSPBK 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.

SSPBK Prolog | Top of page

     NAME       : HCPSSPBK
     DESCRIPTION: Pointer block to SSBDF blocks
     DSECT      : SSPBK
     FUNCTION   : The chain of SSPBKs acts as the trunk of the syntax
                  tree defined by the invocation of the HCPDOSYN macro.
                  The SSPBKs point to the SSBDF blocks, which anchor
                  the branches of the syntax.
     LOCATED BY : SYNSSPPT created during expansion of HCPDOSYN macro.
                  SYNSSPPT changed as a result of the EXTERNAL_SYNTAX
                  statement in the SYSTEM CONFIG file.
                  SSPFWD   created during expansion of HCPDOSYN macro.
                  SSPFWD   changed as a result of the EXTERNAL_SYNTAX
                  statement in the SYSTEM CONFIG file.
     CREATED BY : Invocation of the HCPDOSYN macro.
                  HCPZPUES as a result of the EXTERNAL_SYNTAX
                  statement in the SYSTEM CONFIG file.
     RELOCATION CONSIDERATIONS : None

SSPBK Control Block Content | Top of page

     SSPBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      SSPBK          Pointer block to SSBDF blocks
    0000    0 Address      4 SSPFWD         Address of next SSPBK.
                       - If positive, then this is a system
                         virtual address.
                       - If negative, then the high order bit was
                         ORed on.  Once the high order bit is Xed
                         off, the value will be the real address
                         of the next SSPBK.
    0004    4 Address      4 SSPEPAV        System virtual address of the
                                            epname in SSPEPN.
    0008    8 Character    8 SSPEPN         Epname that contains the SSBDFs.
    0010   16 Character    1 SSP$END (0)    The end

SSPBK Storage Layout | Top of page

    *** SSPBK - Pointer block to SSBDF blocks
    *
    *     +---------------------------+---------------------------+
    *   0 |          SSPFWD           |         SSPEPAV           |
    *     +---------------------------+---------------------------+
    *   8 |                        SSPEPN                         |
    *     +-------------------------------------------------------+
    *
    *** SSPBK - Pointer block to SSBDF blocks

SSPBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    SSP$END        0010
    SSPEPAV        0004
    SSPEPN         0008
    SSPFWD         0000

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:30:50 EDT.
Copyright IBM Corporation, 1990, 2020