On 12/16/2017 06:20 PM, Ram Pai wrote:
Ok. Sounds like I do not have much to do. My patches in its current form will continue to work and provide the semantics you envision.
Thanks for confirming.
I'm open to a different way towards conveying this information to userspace. I don't want to probe for the behavior by sending a signal because that is quite involved and would also be visible in debuggers, confusing programmers.
I am fine with your proposal.
So how can we move this forward? Should I submit a single new patch with the new flag with a more appropriate name (PKEY_ALLOC_SIGNALINHERIT comes to my mind) and the signal inheritance change?
Dave, do you still want to wait for feedback from the x86 maintainer regarding a general interface? Is this really feasible without detailed knowledge of the XSAVE output structure? Otherwise, there probably isn't a way around code which explicitly copies the bits we want to preserve from the interrupted CPU context to the signal handler context.
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