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

#### IOWBK

Prolog

Control Block Contents
IOWBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### IOWBK Prolog

     NAME       : HCPIOWBK
     DESCRIPTION: DATATRACE TYPE IO WORKAREA
     DSECT      : IOWBK
     FUNCTION   : PROCESSOR LOCAL WORKAREA FOR TYPE IO EVENT
                  HANDLER
     LOCATED BY : EVTIOWK
     CREATED BY : HCPTXW
     DELETED BY : HCPTXW

#### IOWBK Control Block Content

#### IOWBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      IOWBK          DATATRACE TYPE IO WORKAREA
    0000    0 Dbl-Word     8 IOWSTRUC (170) TABLE OF CCW ADDRESSES IN IO
                                            TRACE
              00000550       IOWSIZEB       (*-IOWBK) SIZE OF IOWBK IN BYTES
              000000AA       IOWSIZE        (*-IOWBK+7)/8 SIZE OF IOWBK IN
                                            DOUBLEWORDS

#### IOWBK Storage Layout

    *** IOWBK - DATATRACE TYPE IO WORKAREA
    *
    *     +-------------------------------------------------------+
    *   0 |                                                       |
    *     =                       IOWSTRUC                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    * 550
    *
    *** IOWBK - DATATRACE TYPE IO WORKAREA

#### IOWBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    IOWSIZE        0000 000000AA
    IOWSIZEB       0000 00000550
    IOWSTRUC       0000

This information is based on z/VM V6R1.0. Last updated on 18 Feb 2010 at 08:44:38 EDT.
Copyright IBM Corporation, 1990, 2008