Fetch-protection-override (cr0.38) allowed the OS to put fetch protection on page0 while allowing (legacy) access to 0-2047.
Don't know which hardware level allowed exploitation. On Wed, 19 Aug 2020 19:11:33 +0000 "Christopher Y. Blaicher" <[email protected]> wrote: :>We have a program that ran fine on a z13 that now gets an S0C4 on a z15. :>On a z13 we could access data in the PSA in the 2048 to 4095 range without going into key 0. The specific field is PSASVT. :>To get to that data now, we have to do a MODESET to key zero. :>Anyone else find this as a problem? Was it there with a z14? We jumped from a z13 to a z15. -- Binyamin Dissen <[email protected]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
