On Sun, Apr 21, 2002 at 03:26:56PM -0400, Roland McGrath wrote: > > You forgot to make the page table entries also user accessible. Other > > than that, everything works perfect. Thank you. > > Great. Thanks for the fix, and thanks for testing. Have you/can you also > test to be absolutely sure that users cannot access anything but the one > word from %gs, and that they cannot access >VM_MAX_ADDRESS using %ds > (i.e. normal accesses)? I'm pretty darn sure that is all correct, but just > to be paranoid.
I tried to acces %gs:4 and this failed with an "illegal instruction". I also tried to access 0xc0000000 which got a segmentation fault. I don't know if I have to test more. Jeroen Dekkers -- Jabber supporter - http://www.jabber.org Jabber ID: [EMAIL PROTECTED] Debian GNU supporter - http://www.debian.org http://www.gnu.org IRC: jeroen@openprojects
msg04050/pgp00000.pgp
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