lkml.org 
[lkml]   [1997]   [Dec]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Pentium bug fix
On Thu, 18 Dec 1997, Richard B. Johnson wrote:

> Linus discovered that the F00F bug actually attempted to write to
> the IDT. This made the trap easier. The IDT was simply marked present,
> but read-only. The resulting code became trivial because nobody but
> the kernel ever writes to the IDT (it doesn't exist in user space).

Wee historical note. Linus "discovered" this via a call from Intel
engineering. The earliest fix was based on a reverse engineered code which
also originated with Intel... considerable improved/debugged of course.

john alvord


\
 
 \ /
  Last update: 2005-03-22 13:40    [W:1.282 / U:0.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site