[musl] SH sigcontext ABI is broken

[Geert Uytterhoeven]

On Wed, Jun 24, 2015 at 11:34 PM, Rich Felker <dalias@libc.org> wrote:
>> I want musl to support sh2 but I _also_ want it to support coldfire and
>> h8300 and so on. If musl is the successor to uclibc (which needs to be
>> put out of its misery), it needs nommu support for several different
>> architectures. If you insist that every nommu architecture must also run
>> those nommu binaries on with-mmu sibling architectures, you're going to
>> be unifying coldfire and m68k next...
>
> If you look at the kernel I'm pretty sure that already works...
> Coldfire does not seem to be a separate arch/ABI as far as the kernel
> is concerned.

Off-topic, but:
1. While the Coldfire user mode instruction set is (more or less?) a subset
   of the classic m68k user mode instruction set, there are larger differences
   in the supervisor mode instruction sets.
2. Coldfire uses a different MMU than classic m68k.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds