On Thu, Jul 16, 2020 at 10:44:21AM +0200, Rainer Orth wrote:
> Hi Jakub,
>
> >> I may still be mistaken, but all this suggests that Linux might be
> >> playing games with ESP and UESP, while Solaris and NetBSD (see below)
> >> keep them separate, but in the end UESP is the register to use.
> >
> > I think what matters more is
> > kernel/signal.c and ia32/ia32_signal.c doing:
> > put_user_ex(regs->sp, &sc->sp);
> > ...
> > put_user_ex(regs->sp, &sc->sp_at_signal);
> > i.e. both ESP and UESP ought to have the same value in the end on Linux.
> >
> > Your patch is ok for trunk and for 10.3 after a few weeks (10.2 is frozen
> > ATM anyway) so that if there are some problems (like say some headers not
> > defining REG_UESP or something similar), we'll find that out on trunk first.
>
> fair enough. What about the gcc-9 branch by then? I expect there will
> be at least one more release from that one, too?
Ok, but please do it in order (i.e. trunk, then 10+9+8 (if you want 8 too)).
Jakub
