Messages in this thread | | | Subject | Re: Sleeping in user_access section | From | "H. Peter Anvin" <> | Date | Tue, 27 Nov 2018 11:05:40 -0800 |
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On 11/23/18 3:57 AM, Julien Thierry wrote: > > On x86, the EFLAGS.AC bit is also saved upon exception and I think it is > cleared upon exception entry so there is implicit exit from the > user_access mode when taking exception/interrupt. >
No, it is restored, not cleared.
In summary: on exceptions, user_access regions are suspended, and on return the user_access status is resumed.
However, explicitly calling sleeping functions is not supported.
-hpa
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