On Fri, Sep 30, 2011 at 01:54:16PM +0100, Jan Beulich wrote:
> >>> On 30.09.11 at 14:47, Jakub Jelinek <ja...@redhat.com> wrote:
> > On Fri, Sep 30, 2011 at 12:43:54PM +0100, Jan Beulich wrote:
> >> This is so that use of symbols referenced in these asm()-s can be
> >> properly tracked by the compiler, just like is the case for all other
> >> asm()-s. I'm particularly looking forward to use this in the Linux
> >> kernel. It is certainly not very useful in PIC code, at least not with
> >> some extra care.
> >
> > Even in PIC code it can be useful to have toplevel asm like
> > asm ("..." : : "i" (offsetof (struct S, field)), "i" (some_enum_value), "i"
> > (sizeof (struct S)));
> > etc.
>
> But wasn't it you who pointed out that this has limited use in PIC
> mode when I first submitted this?
Sure, some input operands may be problematic in PIC, but the above ones
are just compile time integer constants and those are fine always.
Jakub
