On Tue, 24 Jul 2007, David Miller wrote:
>
> From: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
> Date: Tue, 24 Jul 2007 23:24:55 -0700
>
> > H. Peter Anvin wrote:
> > > How far back was __builtin_trap() supported?
> >
> > I think its relatively recent, but it might be within our supported
> > compiler window.
>
> I'm pretty sure it is.
.. and I'm pretty sure it's immaterial.
We don't just do the "ud2" instruction - we also do the file and line
number information after it. Which means that __builtin_trap() is useless.
So we might as well keep the loop, since both are two-byte instructions
that tell gcc that it will never continue.
Linus
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