I'm pretty sure that nothing about the way MVS works with the Linkage Stack is a programming interface.
How old is that presentation you are using? The Linkage Stack changed significantly with z/Architecture. The definitive documentation is the Principles of Operation. If you want to learn about the structure of the Linkage stack, issue several BAKR instructions and abend. Use IPCS to process the resulting SYSMDUMP. Look at the formatted linkage stack entries in the dump and compare that to storage. -- Tom Marchant On Wed, 10 Jan 2024 10:18:42 -0500, Joseph Reichman <reichman...@gmail.com> wrote: >Hi > >I am using a share PDF as a guide "Dul Address Space & Linkage Stack" as >guide to looking thru a WU Linkage Stack > >In the case of a TCB I believe the current is pointed to by STCBLSDP > >This is I understand it points to the header of which there four different >types each of X'128' bytes in Length > >Header looking the zone portion of the first byte 1001 or 9 >Trailer 1010 or A >Branch Entry C >PC entry D > >In the case of header in order to calculate the address of the next stack it >would be header - 4 > >When I get a X'89' the 8 being the stack suppression bit - 4, -16 , or >even -32 from the header is all zeros > > >Thank you > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, >send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
