MCFBK Back to Index page
 
Prolog 
Control Block Contents 
   MCFBK 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.


  MCFBK Prolog Top of page
  
 NAME       : HCPMCFBK
 DESCRIPTION: Trace Service Tool Monitor Call Trace
              Record Header Format Block
 DSECT      : MCFBK
 FUNCTION   : Overlay for the header of the trace records
              passed to CP via Monitor call class 10
              instructions.
  mployed By -
              HCPTSCGT - Monitor Class 10 Event Handler
              HCSTSF   - Finalize a trace to DASD
              HCSTSG   - Trace services logoff processing
              HCSTSM   - Trace Reduction
 LOCATED BY : local pointer in HCPTSC and HCPTSR
 CREATED BY : MCFTSC
 DELETED BY : MCFTSC
 REFERENCES : None
 RELOCATION CONSIDERATIONS : None
 COMMENTS   :
              This is a variable length control block.
              This control block must provide the same mapping
              as HCPDTFBK.
              If the length of this block increases, compile HCPTSR
              to make sure that the change does not cause the Guest
              Trace data maximum to become invalid.
 
 
  MCFBK Control Block Content Top of page
  




 MCFBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      MCFBK          Trace Service Tool Monitor Call Trace
0000    0 Bitstring    8 MCFHEADER (0)  Record header
0000    0 Signed       2 MCFRLNGT       Length of trace record
0002    2 Signed       2 *              Reserved for IBM USE
0004    4 Signed       2 MCFINDIV       Individualizing code
0006    6 Bitstring    1 MCFTYPE        Type of trace event
0007    7 Bitstring    1 *              Reserved for IBM USE
0008    8 Character    8 MCFTOD         TOD Clock value
0010   16 Bitstring    1 MCFDATA (0)    Trace data passed from the guest
                                        - up to 4000 bytes
 
 
  MCFBK Storage Layout Top of page
  
          
*** MCFBK - Trace Service Tool Monitor Call Trace
*
*     +-------------+-------------+-------------+------+------+
*   0 |  MCFRLNGT   |/////////////|  MCFINDIV   |:TYPE |//////|
*     +-------------+-------------+-------------+------+------+
*   8 |                        MCFTOD                         |
*     +-------------------------------------------------------+
*
*** MCFBK - Trace Service Tool Monitor Call Trace
 
 
  MCFBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
MCFDATA        0010
MCFHEADER      0000
MCFINDIV       0004
MCFRLNGT       0000
MCFTOD         0008
MCFTYPE        0006
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:52:34 EDT.
Copyright IBM Corporation, 1990, 2022