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.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Paul Gilmartin <[email protected]> Sent: Sunday, June 3, 2018 9:58 PM To: [email protected] Subject: Re: ptrace + SVC 144 + R14 + dbx setting register values On Sun, 3 Jun 2018 21:09:56 -0400, Thomas David Rivers wrote: > >And, if SVCs architecturally have this restriction, then perhaps an SVC >isn't the best way for PTRACE to do its break-pts? > How does PER work? I believe it's nondisruptive. And I believe VM gives the end user control over PER. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
