On Wed, Mar 23, 2011 at 11:20 AM, Richard Henderson <r...@redhat.com> wrote: > On 03/23/2011 11:04 AM, Jakub Jelinek wrote: >> For several targets that would grow the context significantly, do you think >> we really have to do that for all targets rather than just for the >> sizeof (_Unwind_Word) > sizeof (void *) ones? The accessors are wrapped >> in inline functions anyway. > > Given that ia64 doesn't use this file, we're talking about 512 bytes for > most 64-bit targets. I suppose that's 512 bytes we needn't allocate for > others, but... > > The problem is that we suddenly have a version mismatch. Suppose we > conditionally add this, then next decade we need to add some other field > unconditionally. Now determining what version X means is non-trivial. > > What targets are you worried most about? >
FWIW, I ran into this on x32, which is totally new and doesn't have backward compatibility issue. -- H.J.
