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  1. Path: sparky!uunet!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!rutgers!njitgw.njit.edu!hertz.njit.edu!dic5340
  2. From: dic5340@hertz.njit.edu (David Charlap)
  3. Newsgroups: comp.os.os2.misc
  4. Subject: Re: OS/2 Crashproof? NOT!
  5. Message-ID: <1992Nov20.224023.22553@njitgw.njit.edu>
  6. Date: 20 Nov 92 22:40:23 GMT
  7. References: <1992Nov18.063745.6394@ringer.cs.utsa.edu> <1992Nov19.203412.23450@njitgw.njit.edu> <1992Nov20.074033.11741@ringer.cs.utsa.edu>
  8. Sender: news@njit.edu
  9. Organization: New Jersey Institute of Technology, Newark, N.J.
  10. Lines: 18
  11. Nntp-Posting-Host: hertz.njit.edu
  12.  
  13. In article <1992Nov20.074033.11741@ringer.cs.utsa.edu> mlevis@ringer.cs.utsa.edu (Mike Levis) writes:
  14. >In article <1992Nov19.203412.23450@njitgw.njit.edu> dic5340@hertz.njit.edu (David Charlap) writes:
  15. >>Well, device drivers don't run at ring 0, at least they're not
  16. >>supposed to.  They run at ring 2 (along with IOPL segments, I
  17. >>believe).
  18. >
  19. >Actually, device drivers do run at ring 0.  From page 241 of _The Design
  20. >of OS/2_ (Deitel and Kogan):
  21. ....
  22.  
  23. Interesting.  I'll have to re-read my source.  I was looking at the
  24. first redbook (Control program), and I was almost certan that drivers
  25. ran at ring 2, along with IOPL segments.  I'll have to double-check.
  26. -- 
  27.   |)  David Charlap          | .signature confiscated by FBI due to
  28.  /|_  dic5340@hertz.njit.edu | an ongoing investigation into the
  29. ((|,)                        | source of these .signature virusses
  30.  ~|~
  31.