On Thu, Feb 08, 2018 at 09:27:56AM -0800, Linus Torvalds wrote: > On Thu, Feb 8, 2018 at 1:13 AM, Peter Zijlstra <pet...@infradead.org> wrote: > > > > _The_ problem is that new binutils cannot sanely decode any function > > that has a WARN in (this very much includes perf annotate): > > Ugh. > > Is there any reason why we don't just use UD2 and avoid this whole issue?
That's what I initially had, but then Arjan told me that a number of emulators fatally terminate on UD2 since they assume it to be BUG. Which is when we all went looking at UD1/UD0. But yes, for our purposes UD2 is perfectly fine too, it will just mess up the people doing bringup and the like.
