Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### TDRBK

Prolog

Control Block Contents
TDRBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### TDRBK Prolog

     NAME       : HCPTDRBK
     DESCRIPTION: TRACE SERVICE TOOL DIAGNOSE READ
                  INFORMATION BLOCK
     DSECT      : TDRBK
     FUNCTION   : Contains data related for processing a Diag x'E0'
     LOCATED BY : VMDTDRBK
     CREATED BY : HCPTSD when processing a Diagnose x'E0' open request.
     DELETED BY : HCPTSD when processing a Diagnose x'E0' close request.
                  HCPTSDDF when user is logging off.
     EMPLOYED BY  HCPTSD when processing a Diagnose X'E0' for
                  open, read or close requests.
     REFERENCES : None
     COMMENTS   : None

#### TDRBK Control Block Content

#### TDRBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      TDRBK          TRACE SERVICE TOOL DIAGNOSE READ
    0000    0 Address      4 TDRNEXTP       Pointer to next TDR block. If 0
                                            then end of chain has been
                                            reached.
    0004    4 Address      4 TDRBACKP       Pointer to previous TDR block.
    0008    8 Address      4 TDRSDFBK       Pointer to SDF block.
    000C   12 Bitstring    1 TDR$END (0)    Defines end of control block

#### TDRBK Storage Layout

    *** TDRBK - TRACE SERVICE TOOL DIAGNOSE READ
    *
    *     +---------------------------+---------------------------+
    *   0 |         TDRNEXTP          |         TDRBACKP          |
    *     +---------------------------+---------------------------+
    *   8 |         TDRSDFBK          |
    *     +---------------------------+
    *
    *** TDRBK - TRACE SERVICE TOOL DIAGNOSE READ

#### TDRBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    TDR$END        000C
    TDRBACKP       0004
    TDRNEXTP       0000
    TDRSDFBK       0008

This information is based on z/VM V6R1.0. Last updated on 18 Feb 2010 at 09:18:09 EDT.
Copyright IBM Corporation, 1990, 2008