PJ41023: PJ40865 incorrectly used a STG to save the initial stack frame address into the four byte field CE3CMSTK.

APAR status

• Closed as program error.

Error description

• See Problem Summary.
  

Local fix

• na
  

Problem summary

• APAR NUMBER:  PJ41023
  PRODUCT:  z/TPF
  FUNCTIONAL AREA:  DATA COLLECTION
  SHIPPED IN PUT:  10
  
  ABSTRACT:
  PJ40865 incorrectly used a STG to save the initial stack frame
  address into the four byte field CE3CMSTK.
  
  PACKAGE CONTENTS:
  Source Segments:
  (C) base/cp/chsz.cpy
  
  Object Only Binaries:
  None.
  
  Configuration Independent Binaries:
  None.
  
  Support Files:
  None.
  
  OTHER BINARIES TO BUILD: YES
  (C) <sys>/obj/ccnucl.o
  (C) <sys>/load/CPS0.so
  
  COMMENTS:
  Prior to PJ40865, CE3CMSTK could contain garbage possibly
  leading to a CTL-4 or CTL-1 in data collection code. PJ40865
  attempted to correct this problem by initializing CE3CMSTK to
  the initial stack frame address. However, a STG instruction was
  used to save the initial stack frame address into the four byte
  field CE3CMSTK. As a result, the CE3CMSTK field would be set to
  zero and the initial stack frame address saved into the first
  four bytes of the following reserved field CE3MRESVD. Even
  though PJ40865 was coded in error, it will prevent the possible
  CTL-4 and CTL-1 since it removes the possibility of CE3CMSTK
  having garbage in it.
  

Problem conclusion

• SOLUTION:
  chsz.cpy was modified to use a ST instruction instead of a STG
  to save the initial stack frame address in CE3CMSTK.
  
  COREQS: NO
  None.
  
  MIGRATION CONSIDERATIONS: NO
  None.
  
  BUILD COMMANDS AND INSTRUCTIONS: YES
  #maketpf commands for linux
  maketpf -f CPS0 ccnucl.o
  maketpf CPS0 link
  
  UPDATED INFORMATION UNITS: NO
  None.
  
  See your IBM representative if you need additional information.
  
  DOWNLOAD INSTRUCTIONS:
  http://www.ibm.com/software/htp/tpf/maint/maintztpf.html
  
  APAR URL:
  http://www.ibm.com/software/htp/tpf/ztpfmaint/put10/PJ41023.htm
  

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:

Fix information

• Fixed component name

  Z/TPF

• Fixed component ID

  5748T1501

Applicable component levels

• R110 PSY

     UP