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Re: %gs:0 thread pseudoregister in oskit-mach

From: Roland McGrath
Subject: Re: %gs:0 thread pseudoregister in oskit-mach
Date: Sun, 21 Apr 2002 15:26:56 -0400 (EDT)

> 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.


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