Messages in this thread | | | Date | Sat, 23 May 2020 04:21:33 +0200 | From | andi@notmuch ... | Subject | Re: umip: AMD Ryzen 3900X, pagefault after emulate SLDT/SIDT instruction |
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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
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