Executable memory: further programs that fail

[Roland McGrath]

> I react to the notion that shared libraries can be placed 
> "at random" in free space. Lisp systems, database systems,
> numeric systems (e.g. large matrix computations), all rely on
> large, contiguous blocks of storage. In fact the size of the
> problem they can handle depends on the size of contiguous 
> storage. I don't understand why fragmenting free storage
> helps security. I certainly understand why it hurts certain
> applications.

I've already explained how to reserve arbitrarily large portions of the
address space ahead of time for the application's exclusive use.
Is that not sufficient control for your needs?