[Bug 297426] linuxulator: linprocfs /proc/self/exe host path breaks execve under Linux ABI

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=297426

--- Comment #18 from Dan Kotowski <dan.kotowski@a9development.com> ---
Also works as expected even when using linprocfs under /compat/linux

$ /compat/linux/usr/bin/python3.9
Python 3.9.25 (main, Apr 17 2026, 00:00:00)
[GCC 11.5.0 20240719 (Red Hat 11.5.0-14)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> print('readlink:', os.readlink('/proc/self/exe'))
readlink: /compat/linux/usr/bin/python3.9
>>> print('readlink:', os.readlink('/compat/linux/proc/self/exe'))
readlink: /compat/linux/usr/bin/python3.9
>>> try:
...     print('stat:', os.stat('/compat/linux/proc/self/exe'))
... except OSError as e:
...     print('stat: FAIL --', e)
...
stat: os.stat_result(st_mode=33261, st_ino=1426886, st_dev=4259517978,
st_nlink=1, st_uid=0, st_gid=0, st_size=15448, st_atime=0, st_mtime=1779238957,
st_ctime=1785159540)
>>> try:
...     os.execv('/compat/linux/proc/self/exe', ['python3', '-c',
'print(\"execv OK\")'])
... except OSError as e:
...     print('stat: FAIL --', e)
...
execv OK

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