Re: [PATCH v2] x86: Start removing X86_X32_ABI

[Maciej W. Rozycki]

On Wed, 8 Jul 2026, David Laight wrote:

> >  Weird, x32 vs x64 for the Intel ISA or say n32 vs n64 for the MIPS ISA 
> > are psABI variants rather than architectures.  All are native, just using 
> > different register usage conventions.
> 
> IIRC n32 just uses the 32bit system calls.

 It has its own set, as it's a 64-bit ABI and needs to pass 64-bit data 
accordingly.

> So the x86-64 kernel has to have three sets of system call wrappers (etc).

 Likewise a 64-bit MIPS kernel.  Depending on the configuration chosen it 
may have up to three sets, two 64-bit sets for n32 and n64 psABIs each and 
one 32-bit set for o32 compat psABI.

 I don't know what psABI Debian chose for their 64-bit MIPS ports when 
they were still live, but the default for the GNU toolchain for the Linux 
target has been n32.

  Maciej