Messages in this thread | | | From | "Eric Ries" <> | Subject | RE: FPU precision & signal handlers (bug?) | Date | Mon, 4 Mar 2002 15:31:26 -0800 |
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> -----Original Message----- > From: Alan Cox [mailto:alan@lxorguk.ukuu.org.uk] > Sent: Monday, March 04, 2002 2:38 PM > To: Eric Ries > Cc: linux-kernel@vger.kernel.org > Subject: Re: FPU precision & signal handlers (bug?) > > > Think about MMX and hopefully it makes sense then.
Yes, I think I understand why this is the case presently.
> > strikes me as kind of a hack. Why should the signal handler, alone > > among all my functions (excepting main) be responsible for blowing > > away the control word? > > Right - I would expect it to be restored at the end of the signal handler > for you - is that occuring or not ? I just want to make sure I understand > the precise details of the problem here.
Yes, my belief is that the kernel undoes the FINIT changes by restoring the FPU state after the signal handler returns.
Eric
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