misc/59367: t_magic_symlinks:machine_arch broken under compat32

[campbell+netbsd%mumble.net@localhost]

>Number:         59367
>Category:       misc
>Synopsis:       t_magic_symlinks:machine_arch broken under compat32
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 27 15:50:00 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current
>Organization:
The MagicBSD Architecture Linc.
>Environment:
NetBSD 10.99.14 (GENERIC64) #489: Fri Apr 25 10:50:12 CEST 2025 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/evbarm/compile/GENERIC64
>Description:
Test case: kernel/t_magic_symlinks/machine_arch

Duration: 0.126906 seconds
Termination reason

FAILED: kernel does not handle magic symlinks properly
Standard output stream

Initialized vfs.generic.magiclinks=1
Restored vfs.generic.magiclinks=0

Standard error stream

cd: check: can't cd to link


Presumably this happens because `uname -p' returns something different from what a @machine_arch magic symlink expands to, under compat32.
>How-To-Repeat:
cd /usr/tests/kernel
atf-run t_magic_symlinks | atf-report
>Fix:
Yes, please!