Andrew Doran wrote:

> Specificdata isn't usually appropriate for non-3rd party / core components
> of the system because it adds a lot of overhead; in this case I think a
> flagbit would do just as well.

The original implementation had a flagbit, but others requested that PaX
features (MPROTECT, ASLR, and SegvGuard) use specificdata(9) instead of
wasting bits.

-e.