Dave, IBM is telling you that R14 is not important! How dare you question the coding gods that we must all provide supplication to?
Just kidding. Sorry.. LOL It seems a bit arbitrary that you would have to what .... make sure the trace table went far enough back to see what R14 was? Or worse.. have to take a stand-alone dump? Maybe a slip trap for all modifications of R14!!! That the ticket to absurd-ville. Rob Schramm On Wed, Jun 6, 2018 at 2:10 PM Thomas David Rivers <[email protected]> wrote: > Paul Gilmartin wrote: > > >On Mon, 4 Jun 2018 16:58:31 +0000, Seymour J Metz wrote: > > > > > > > >>PER uses program interrupts, not an SVC. > >> > >>That said, calling an SVC does not normally alter R14; the SVC would > have to do something unusual. > >> > >> > >> > >Does either PER or SVC preserve the program mask (CC, ILC, ...)? > >If so, that's the one dbx ought to use. > > > >Saving these things can be important if you break just before an IPM > instruction. > > > >-- gil > > > > > > > > > It's not the saving of the registers/PSW state that is at question, it's > the > changing of it. > > Imagine you're debugging a program and hit a break-pt, and would like to > change a register/PSWA before continuing... that's what we're talking > about here. > > IBM provides the facilities to do this for all the registers _except_ R14. > > - Dave R. - > > > -- > [email protected] Work: (919) 676-0847 > Get your mainframe programming tools at http://www.dignus.com > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Rob Schramm ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
