Re: Find control boundary with a machine interface instruction

Thanks Marco for your help.


With the instructions FNDRINVN, MATINVAT and MATPTRIF, I am trying to get
whether any stack entry is a control boundary or not. I am not finding this
information when materializing the corresponding pointers.

I think I could deduce it from the activation group mark by comparing it
with the previous entry.

I don't know if I'm on the right track.
Javier Mora

El lun, 10 feb 2025 a las 17:38, Marco Facchinetti (<
marco.facchinetti@xxxxxxxxx>) escribió:

https://www.ibm.com/docs/en/i/7.5?topic=execution-materialize-invocation-stack-matinvs

But don't forget:

Warning
The following information is subject to change from release to release. Use
it with caution and be prepared to adjust for changes with each new
release.

Note
It is recommended that you use Materialize Invocation Attributes (MATINVAT)
or Materialize Invocation Entry (MATINVE) to materialize an 8-byte
invocation mark. 4-byte marks can wrap and produce unexpected results.

--
Marco Facchinetti

Mr S.r.l.

Tel. 035 962885
Cel. 393 9620498

Skype: facchinettimarco


Il giorno lun 10 feb 2025 alle ore 17:06 datil400 <datil400@xxxxxxxxx> ha
scritto:

Hi guys,

QWVRCSTK API and STACK_INFO table function return information about the
control boundary of each entry in the call stack.

I have been investigating to find out if it is possible to obtain this

data

through the machine interface. I have not found anything that helps me.

Is this possible?
Best regards

--
Javier Mora
https://github.com/datil400
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