PI89098: IGZXBST2+8A abend0c4 after COBOL DLL function gets control from XPLink code

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When COBOL DLL code gets control from an XPLink environment, a
  transition stack frame will be present on the non-XPLink
  (upwards growing) stack. Code in IGZXBST2 attempts to determine
  if it was called by a COBOL v5+ caller by looking at word zero
  in the prior stack frame, but the backlink field in the
  transition stack frame is x'FFFFFFFF', resulting in the 0C4.
  
  COBOL/Java interoperability applications can encounter this
  problem when calling native methods written in COBOL, as Java
  runs in an XPLink environment.
  
  Due to non-standard register save area structure during the
  COBOL bootstrap process, the exception may be reported as being
  at a large offset in CEEVRONU, which mediates the XPLink to
  upwards growing stack transition.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Enterprise COBOL users running COBOL V5+     *
  *                 programs that are called by XPLINK programs. *
  ****************************************************************
  * PROBLEM DESCRIPTION: Run-time ABEND0C4. When an COBOL V5+    *
  *                      program is called by an XPLINK          *
  *                      program, an 0C4 abend may occur in      *
  *                      IGZXBST2.                               *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  COBOL bootstrap routines IGZXBST1/IGZXBST2 could not handle
  being called by the LE stack switching routine CEEVRONU.
  

Problem conclusion

• The COBOL bootstrap routines have been corrected.
  

Temporary fix

Comments

APAR Information

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

  PI82718

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

Modules/Macros

• IGZ2OPT  IGZCEV4  IGZCMGEN IGZCMGUE IGZLLIBV IGZXAPI  IGZXCDA
  IGZXD24  IGZXDMR  IGZXLPIO IGZXLPKA IGZXLPKB IGZXLPKC IGZXLPKD
  IGZXLPKE IGZXLPKF IGZXLPKG IGZXOPT  IGZXPK2
  

Fix information

• Fixed component name

  LE ENT COBOL LI

• Fixed component ID

  568819812

Applicable component levels

• R7B0 PSY UI51309

     UP17/10/30 P F710

Fix is available

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