lkml.org 
[lkml]   [2020]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: umip: AMD Ryzen 3900X, pagefault after emulate SLDT/SIDT instruction
On 11:56 19.05.20, Brendan Shanks wrote:
> The problem is that the kernel does not emulate/spoof the SLDT instruction, only SGDT, SIDT, and SMSW.
> SLDT and STR weren't thought to be commonly used, so emulation/spoofing wasn’t added.
> In the last few months I have seen reports of one or two (32-bit) Windows games that use SLDT though.
> Can you share more information about the application you’re running?

This is basically the "minimal" reproducer for the issue I've been
observed (as by the previously linked article):

https://gist.githubusercontent.com/andir/071981717460242a1df2e0fc20836fdc/raw/0c31877aa7ee59146596fe68934f9cecb5c998ae/test.c

\
 
 \ /
  Last update: 2020-05-23 04:23    [W:0.090 / U:0.096 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site