[lkml]   [2018]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: RFC: userspace exception fixups
On Mon, Nov 19, 2018 at 8:02 AM Jarkko Sakkinen
<> wrote:
> On Mon, Nov 19, 2018 at 07:29:36AM -0800, Andy Lutomirski wrote:
> > 1. The kernel needs some way to know *when* to apply this fixup.
> > Decoding the instruction stream and doing it to all exceptions that
> > hit an ENCLU instruction seems like a poor design.
> I'm not sure why you would ever need to do any type of fixup as the idea
> is to just return to AEP i.e. from chosen exceptions (EPCM, #UD) the AEP
> would work the same way as for exceptions that the kernel can deal with
> except filling the exception information to registers.

Sure, but how does the kernel know when to do that and when to send a
signal? I don't really like decoding the instruction stream to figure
it out.

 \ /
  Last update: 2018-11-19 18:20    [W:0.118 / U:3.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site