Re: Can we drop upstream Linux x32 support?

Ivan Ivanov
2018-12-12T18:50:41Z

Please don't drop x86 support from the Linux kernel ! You may not
realize it, but there are plenty of people who care about x86 systems.
I have a good old Pentium 4 based computer which is 32-bit, using it
for some weird Linux experiments + retro gaming, and if I can't run
new Linux kernels there - it would be SAD
ср, 12 дек. 2018 г. в 21:15, Joseph Myers <joseph@codesourcery.com>:
>
> On Wed, 12 Dec 2018, Arnd Bergmann wrote:
>
> > > MIPS had o32, n32, n64 since like forever.
> >
> > o32 and n32 are practically the same, the only difference on the
> > syscall ABI that I can see are the actual syscall numbers, and
> > the 'struct sigcontext' definition.
>
> And for syscalls that have 64-bit arguments, n32 generally passes those in
> a single register (like n64), not pairs of registers (like o32). But,
> yes, userspace structure layout for n32 is generally much closer to o32
> than to n64.
>
> --
> Joseph S. Myers
> joseph@codesourcery.com