How do you find the user structure?

[Guy Harris]

>I wonder if anyone has thought about making the handling of the user
>area portable in SVR4?  It seems to be quite different in every
>version I've looked at.  I assume that the reduction of
>machine-specific code is an objective for new releases, especially in
>the memory management area.

Yes, the machine-dependencies in the VM code should be more centralized
and circumscribed in S5R4.0, since it's picking up SunOS 4.0-style VM
code.  I don't know how portable the U area stuff will be; some of that
may still end up being part of the machine-dependent code.

Then again, S5R4 should also have "/proc", which will provide what
should be a machine-independent way to get a lot of information about
processes, obviating the need to rummage around in the kernel's address
space and know how it implements the U area.