Re: [PATCH 1/3] module: deal with alignment issues in built-in module versions

Dmitry Torokhov
2011-02-17T22:19:57Z

On Thu, Feb 17, 2011 at 02:01:19PM -0800, David Miller wrote:
> From: Linus Torvalds <torvalds@linux-foundation.org>
> Date: Thu, 17 Feb 2011 13:54:57 -0800
>
> > Is there a -fdata-align or something? Or would __attribute__((packed))
> > help? Something that explicitly tells gcc "don't do this", instead of
> > "let's add indirection and hope gcc doesn't add alignment for _that_".
> > Especially as the extra pointer makes the code even uglier.
>
> The tracing folks went down the path of trying to use packed in
> various ways, to no avail, because no matter what they tried it broke
> other things.
>
> > And if we do have to use the pointer thing, let's at least then do the
> > pointer with asms, so that gcc _really_ can't screw it up. Rather than
> > just move the potential bug around.
>
> That's fine with me.

Any pointers as to how to emit these pointers with asm?

--
Dmitry