Path: utzoo!attcan!uunet!mcvax!enea!kth!draken!chalmers!cs.chalmers.se!augustss
From: augustss@cs.chalmers.se (Lennart Augustsson)
Newsgroups: comp.unix.wizards
Subject: Need memory at 0 on SUN
Message-ID: <2768@fnatte.cs.chalmers.se>
Date: 20 Oct 88 20:06:52 GMT
Organization: Dept. of CS, Chalmers, Sweden
Lines: 17

I need to run a program on a SUN3 (running SunOS 3.4) with virtual 
read/write memory starting at virtual address 0.  Sun (in their infinite
wisdom) has decided that memory starts at 0x2000.  Accessing 0-0x1fff causes
a segmentation violation (normally I think this is a good idea, but not
this time).  Does anyone know how to get this?  I have already tried obvious
things like other magic numbers, telling the linker to put code at 0...  I've
also tried less obvious things like mapping a part of the screen to address
0 with mmap.  So far all attempts have failed and I would be grateful for any
hints.  (No, we don't have the source code for SunOS 3.4, so modifying
the kernel would be difficult.)



-- 

	Lennart Augustsson
Email:	augustss@cs.chalmers.se or augustss@chalmers.csnet