PI38102: ABEND0C4 IN IGZXBST AFTER CALLING AMODE(24) COBOL V5 MODULE FROMAN AMODE(31) ENVIRONMENT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An assembler program running amode(31) provides a save area
  below the line for the purpose of invoking amode(24) code, but
  when so calling an amode(24) COBOL v5 program, there's an
  abend0c4 in IGZXBST, the COBOL bootstrap program.
  
  IGZXBST, running amode(24), is examining its caller's caller's
  save area, which is above the line.
  
  In the reported case, this came to light only after the COBOL v5
  run-time was moved from JOBLIB/STEPLIB to the linklist,
  resulting in a different memory layout.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Enterprise COBOL V5 AMODE(24) program called *
  *                 by an AMODE(31) caller, whose caller is      *
  *                 using above the line storage for its save    *
  *                 area.                                        *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: When an Enterprise COBOL V5 AMODE(24)   *
  *                      program is called, an 0C4 ABEND may     *
  *                      occur in IGZXBST if the save area of    *
  *                      its caller's caller is above the line.  *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  In an attempt to determine if the call is eligible for fast path
  processing, the bootstrap program IGZXBST back-tracks the call
  sequence and accesses the save areas to see if the call was done
  by another Enterprise COBOL V5 program using a function
  descriptor. However in this case the caller's caller is an
  assembler program using above the line storage for its save
  area, which is non-addressable by the AMODE(24) program,
  resulting in an 0C4 ABEND.
  

Problem conclusion

• The bootstrap programs IGZXBST and IGZXBST1 are corrected to
  check for the addressiblity of the save area before accessing
  it.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  PI43129

Modules/Macros

• IGZXLPKA
  

Fix information

• Fixed component name

  LE ENT COBOL LI

• Fixed component ID

  568819812

Applicable component levels

• R780 PSY UI26787

     UP15/04/24 P F504

• R790 PSY UI26788

     UP15/04/24 P F504

Fix is available

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