Re: Patched Programs - Yet another spin
"Steve Richter" <[email protected]>
| Newsgroups | gmane.comp.lang.as400.mi |
|---|---|
| Message-ID | <[email protected]> |
-----Original Message----- From: mi400-bounces-Zwy7GipZuJhWk0Htik3J/[email protected] [mailto:mi400-bounces-Zwy7GipZuJhWk0Htik3J/[email protected]]On Behalf Of Dave McKenzie Sent: Wednesday, February 15, 2006 10:25 AM To: MI Programming on the AS400 / iSeries Subject: Re: [MI400] Patched Programs - Yet another spin >The trick of putting PowerPC instructions in a user space won't work >anymore because there's a new bit in the hardware page tables (new in >V5R3) called "Nex," which I think stands for "No execute." The bit is 1 >for user spaces, meaning that code in a user space can't be executed. that's no fun! What is the hardware page table? Can the patched code in the RPG program first change the object type and sub type of the user space to *PGM? Kind of as a boot strap type process where you are coding a permanent user space executable that can turn off the NEX bit in other hardware page table entries. -Steve _______________________________________________ This is the MI Programming on the AS400 / iSeries (MI400) mailing list To post a message email: MI400-Zwy7GipZuJhWk0Htik3J/[email protected] To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/mi400 or email: MI400-request-Zwy7GipZuJhWk0Htik3J/[email protected] Before posting, please take a moment to review the archives at http://archive.midrange.com/mi400.