When binfmt_misc is not visible, execve of an x86 ELF reexecs FEX by path.
That drops the caller-supplied argv[0] and asks the next FEX to reopen the
file through RootFS. Keep the resolved ELF in FEX_EXECVEFD, retain argv[0],
and mark the FD as path-backed so /proc/self/exe stays the real path.
Anonymous memfd execution is unchanged.
Yassin Soliman
1644d185c4