Questions tagged [fxsave]
3 questions
11
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2 answers
What are coding conventions for using floating-point in Linux device drivers?
This is related to
this question.
I'm not an expert on Linux device drivers or kernel modules, but I've been reading "Linux Device Drivers" [O'Reilly] by Rubini & Corbet and a number of online sources, but I haven't been able to find anything on…
Die in Sente
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4
votes
1 answer
Linux device driver unsafe FXSAVE/FXRSTOR bug -- any precedents?
There's a nasty problem that has temporarily stumped a number of engineers at my company trying to debug it.
The C++ program is normally run on a cluster of multicore computers with MPI.
It will run for a very long time -- perhaps days -- and then…
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0
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0 answers
When can I call xsaves and xsaves64?
When is it allowed to call xsaves and xsaves64?
Using Intel Software Development Emulator (8.12.0-2017-10-23), I can use xsaves64 + xrstors64 from user-space without any problems, but trying to use xsaves + xrstors produces:
Illegal instruction at…
gnzlbg
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