Re: Possible miscompilation issue with floating point operations

[Aurelien Jarno <aurelien@aurel32.net>]

On 2016-02-11 10:47, Sébastien Villemot wrote:
> Le jeudi 11 février 2016 à 09:11 +0100, Aurelien Jarno a écrit :
> > On 2016-02-10 14:14, Sébastien Villemot wrote:
> > > [Please Cc me on replies, I'm not subscribed to the list]
> > > 
> > > Dear mips porters,
> > > 
> > > I attach a C source code that, when compiled with gcc-5, crashes with
> > > "Illegal instruction" on mips, while it works correctly when compiled
> > > with gcc-4.9 [tested on minkus.debian.org].
> > > 
> > > The problem looks like a miscompilation (the code only does some basic
> > > floating-point operations), but it was pointed out by Julien Cristau
> > > that it could also be a kernel issue (since floating point instructions
> > > are emulated on Debian mips hardware).
> > 
> > This is actually a kernel issue, which has been fixed by this patch:
> > 
> > https://git.kernel.org/linus/e4553573b37c3f72533683cb5f3a1ad300b18d37
> > 
> > We are working on getting the fix deployed on the build daemons.
> 
> Great, thanks for your feedback and for your work on this.
> 
> If possible, please keep me (and Dirk in cc) informed about the
> resolution of this issue (or is there a bug open?).

The kernel has been fixed in the last jessie point released, and it has
been deployed on the build daemons. Don't hesitate to contact me if a
package should be requeued.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net