The documentation about what it does is here: https://www.ibm.com/docs/en/zos/3.1.0?topic=overview-address-space-layout-randomization
Jim Mulder -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Mark Jacobs Sent: Monday, September 9, 2024 9:57 PM To: [email protected] Subject: Re: 24-bit private region on z16 processor That's it. Yes. These systems do have ASLR active. I didn't realize that once its enabled we can expect what I'm seeing. Is that documented anywhere? Mark Jacobs Sent from ProtonMail, Swiss-based encrypted email. GPG Public Key - https://api.protonmail.ch/pks/lookup?op=get&[email protected] On Monday, September 9th, 2024 at 8:19 PM, Jim Mulder <[email protected]> wrote: > I would expect that if Address Space Layout Randomization is active. > > Is ASLR(YES) specified in DIAGxx? > > The D DIAG command, or VERBX IGVDGNIP under IPCS, will tell you. > > Jim Mulder > > -----Original Message----- > From: IBM Mainframe Discussion List [email protected] On Behalf > Of Mark Jacobs > > Sent: Monday, September 9, 2024 6:16 PM > To: [email protected] > Subject: Re: 24-bit private region on z16 processor > > I'm 99% sure those parameters aren't in any of the systems where I'm being > weirded out as it relates to where low private begins when I look at it using > SDSF VMAP, but I'll check tomorrow. > > Mark Jacobs > > Sent from ProtonMail, Swiss-based encrypted email. > > GPG Public Key - > https://api.protonmail.ch/pks/lookup?op=get&search=markjacobs@protonma > il.com > > > > > On Monday, September 9th, 2024 at 4:40 PM, Allan Staller > [email protected] wrote: > > > Classification: Confidential > > > > "Low Core" generally extend up to about x'6000' (give or take). This is the > > start of low private. > > V=R and ADDRSPC storage IIRC is just above this so actual "low private" may > > start (e.g. x'8000') depending on values for V=R and ADDRSPC=REAL stoarge. > > > > FWIW, these 2 parameters date from "day 1" of virtual storage and are > > probably useless in this day and age. > > If they are still present in IEASYSxx, I would suggest removing them when > > convenient. > > > > HTH, > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [email protected] On > > Behalf Of Mark Jacobs > > > > Sent: Monday, September 9, 2024 3:05 PM > > To: [email protected] > > Subject: Re: 24-bit private region on z16 processor > > > > [CAUTION: This Email is from outside the Organization. Unless you > > trust the sender, Don’t click links or open attachments as it may be > > a Phishing email, which can steal your Information and compromise > > your Computer.] > > > > I'm not talking about the top of the 24-bit private region, I'm looking at > > the beginning/bottom of the region and it's starting all over the place. > > > > Mark Jacobs > > > > Sent from ProtonMail, Swiss-based encrypted email. > > > > GPG Public Key - > > https://api.protonmail.ch/pks/lookup?op=get&search=markjacobs@proton > > ma > > il.com > > > > On Monday, September 9th, 2024 at 2:30 PM, Mike Schwab > > [email protected] wrote: > > > > > Varies by operating system level occasionally PTF, and user > > > configuration such as TSO in (non-)LPA area. > > > > > > On Mon, Sep 9, 2024 at 8:25 AM Mark Jacobs > > > [email protected] wrote: > > > > > > > Silly question. Is there anything different as it relates to sizing of > > > > the 24-bit private region on z16 processors? > > > > > > > > Mark Jacobs > > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
