> | OS/390 does something like that, even for non-setuid processes.
> | (no problems either: OS/390 is UNIX) So gcc could be hacked.
>
> On which planet? OS/390 is a cross of MVS and VM; it has a POSIX
> compatibility layer, but its guts are *not* Unix-like.
"OS/390 Version 1 Release 2 is a a certified UNIX system,
having achieved X/Open's XPG4 UNIX Profile Brand."
That's better than we can say. As for the "guts", who cares?
It could be a microkernel written in FORTRAN and still be unix.
It should be clear now that vulnerability to stack smashing is
not a unix requirement.
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