On Thu, Jul 8, 2021 at 3:04 PM Huacai Chen <chenhuacai@xxxxxxxxx> wrote:
> On Tue, Jul 6, 2021 at 6:17 PM Arnd Bergmann <arnd@xxxxxxxx> wrote:
> > On Tue, Jul 6, 2021 at 6:18 AM Huacai Chen <chenhuacai@xxxxxxxxxxx> wrote:
> > > +
> > > +#ifndef _NSIG
> > > +#define _NSIG 128
> > > +#endif
> >
> > Everything else uses 64 here, except for MIPS.
>
> Once before we also wanted to use 64, but we also want to use LBT to
> execute X86/MIPS/ARM binaries, so we chose the largest value (128).
> Some applications, such as sighold02 in LTP, will fail if _NSIG is not
> big enough.
Have you tried separating the in-kernel _NSIG from the number used
in the loongarch ABI? This may require a few changes to architecture
independent signal handling code, but I think it would be a cleaner
solution, and make it easier to port existing software without having
to special-case loongarch along with mips.
Arnd
