"IBM Mainframe Assembler List" <ASSEMBLER-LIST@LISTSERV.UGA.EDU> wrote on
01/21/2022 09:16:30 AM:
> Dave Clark wrote
> <snip>
> is there
> some other means of knowing whether or not to save the high halves in
the
> caller's save area?
> </snip>
>
> This has been covered many times. It's your interface. If you documented
> that they should provide a save area suitable for saving high halves in
> that area then you assume that they have met the interface requirements.
> If they didn't (especially with respect to save area), bad things will
> happen. It's no different than if you required a 72-byte save area and
> they gave you a shorter one.
Yes, I'm fully aware of all that. However, my program is being
called by REXX and I'm not aware of any documentation stating what kind of
register save area REXX provides. That is why I asked and was wondering
if there is, perhaps, a code in the first word of the save area that
indicated the format used -- and, in the absences of such a code, the
72-byte savearea is all there is.
Sincerely,
Dave Clark
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