Subject: Re: NetBSD without MMU ?
To: Lennart Augustsson <>
From: Todd Vierling <>
List: tech-embed
Date: 04/12/2002 12:02:17
On Fri, 12 Apr 2002, Lennart Augustsson wrote:

: > However, you do have to do some really major evil and hack the compiler to
: > make all code PIC-and-then-some (ensuring base register relative addressing
: > for all data accesses).

: Not at all.  Original Unix implemented fork() without PIC.  What you do
: is that you copy all of the current process to swap space and then you
: make that process the parent (well, I guess you could make it the child
: if you want).

This is also known as `banking' process contexts.

It's still evil from a modern CPU standpoint.  8-)

-- Todd Vierling <>  *  Wasabi & NetBSD:  Run with it.
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