4 ms·

IBM i (OS/400) has had single address space, tagged pointers, and an number of other "novel" things in the loop for eons. Many people interact with it daily, i

by kev009 6y ago

IBM i (OS/400) has had single address space, tagged pointers, and an number of other "novel" things in the loop for eons. Many people interact with it daily, indirectly, in most of your big box retail stores (think stores like Costco, Lowes, etc).

coldtea 6y ago
Parent did say "it [single address space] feels reliant on hardware less defective than we presently have in commodity user gui performance systems". OS/400 and successors don't run on this kind of hardware.
- kevin_thibedeau 6y ago
  Is that kind of hardware going to be available in 50 years?
  - coldtea 6y ago
    Given how we don't even have ECC memory, we shouldn't hold our breaths...
    - pjmlp 6y ago
      In what concerns ARM and SPARC platforms, memory tagging is happening and being adopted by Apple/Google platforms, in what concerns Intel, it was yet again another from their screwups.
      - coldtea 6y ago
        Interesting. Do Apple M1/Ax have memory tagging already?
        pjmlp 6y ago
        Not 100% there, but pointer autentication is already a step into that direction. https://developer.apple.com/documentation/security/preparing_your_app_to_work_with_pointer_authentication https://developer.apple.com/documentation/security/preparing... Meanwhile Google is doing the homework for Android. "[Arm DevSummit - Ecosystem Talk] Improving Your Android App to Prevent Security Vulnerabilities" https://www.youtube.com/watch?v=zkoOD4hmiGE https://www.youtube.com/watch?v=zkoOD4hmiGE And regardless of one thinks of Oracle, Solaris SPARC has had it for ages. https://docs.oracle.com/cd/E37838_01/html/E61059/gqajs.html https://docs.oracle.com/cd/E37838_01/html/E61059/gqajs.html
raggi 6y ago
They're not without their share of critical hardware bugs too, e.g. CVE-2020-4788
bogomipz 6y ago
I'm curious about tagged pointers, do those relate to the single address space design? Might you or someone else have any good links on this?
- pjmlp 6y ago
  You can start by the links on my comment, https://news.ycombinator.com/item?id=25743690 https://news.ycombinator.com/item?id=25743690

by kev009 6y ago

coldtea 6y ago

Parent did say "it [single address space] feels reliant on hardware less defective than we presently have in commodity user gui performance systems". OS/400 and successors don't run on this kind of hardware.

kevin_thibedeau 6y ago
Is that kind of hardware going to be available in 50 years?
- coldtea 6y ago
  Given how we don't even have ECC memory, we shouldn't hold our breaths...
  - pjmlp 6y ago
    In what concerns ARM and SPARC platforms, memory tagging is happening and being adopted by Apple/Google platforms, in what concerns Intel, it was yet again another from their screwups.
    - coldtea 6y ago
      Interesting. Do Apple M1/Ax have memory tagging already?
      - pjmlp 6y ago
        Not 100% there, but pointer autentication is already a step into that direction. https://developer.apple.com/documentation/security/preparing_your_app_to_work_with_pointer_authentication https://developer.apple.com/documentation/security/preparing... Meanwhile Google is doing the homework for Android. "[Arm DevSummit - Ecosystem Talk] Improving Your Android App to Prevent Security Vulnerabilities" https://www.youtube.com/watch?v=zkoOD4hmiGE https://www.youtube.com/watch?v=zkoOD4hmiGE And regardless of one thinks of Oracle, Solaris SPARC has had it for ages. https://docs.oracle.com/cd/E37838_01/html/E61059/gqajs.html https://docs.oracle.com/cd/E37838_01/html/E61059/gqajs.html

raggi 6y ago

They're not without their share of critical hardware bugs too, e.g. CVE-2020-4788

bogomipz 6y ago

I'm curious about tagged pointers, do those relate to the single address space design? Might you or someone else have any good links on this?

pjmlp 6y ago
You can start by the links on my comment, https://news.ycombinator.com/item?id=25743690 https://news.ycombinator.com/item?id=25743690