svn commit: r317809 - head/share/man/man7

[Konstantin Belousov]

On Mon, May 08, 2017 at 01:37:15PM -0700, John Baldwin wrote:
> On Thursday, May 04, 2017 09:31:50 PM Konstantin Belousov wrote:
> > Author: kib
> > Date: Thu May  4 21:31:50 2017
> > New Revision: 317809
> > URL: https://svnweb.freebsd.org/changeset/base/317809
> > 
> > Log:
> >   Provide introduction for the arch(7) manpage.
> >   
> >   Start with some words about linear address space and its layout, then
> >   explain pointers models and ABIs, providing explanation to the
> >   structure of the tables.
> >   
> >   Reviewed by:	emaste, imp
> >   'Future-proof' cheri wording by:	brooks
> >   Sponsored by:	The FreeBSD Foundation
> >   MFC after:	2 weeks
> >   Differential revision:	https://reviews.freebsd.org/D10596
> 
> Note that mips n32 is neither ILP32 or LP64, it P32L64.  (Similar to x32
> for x86 if we were to ever add that.)  Thus, we support 3 ABIs rather
> than just 2.

I trust your information about MIPS n32, but x32 uses ILP32 model.
In particular, sizeof(long) == 4, according to the AMD64 ABI Draft 0.99.8,
which includes both LP64 and ILP32 (x32) ABI description.