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Date: Wed, 5 Mar 2003 15:39:51 -0600 (CST)
From: Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de>
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To: ravikumar.chakaravarthy@amd.com
cc: mbligh@aracnet.com, <linux-kernel@vger.kernel.org>
Subject: RE: Loading and executing kernel from a non-standard address usin
 g SY SLINUX
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On Tue, 4 Mar 2003 ravikumar.chakaravarthy@amd.com wrote:

> Yes the kernel is uncompressed to the right location (0x200000), in my
> case. When I try to uncompress it to a non standard address (other than
> 0x100000), the address mapping is affected. Thats why I tried to change
> the PAGE_OFFSET value to 0xc0100000, which should be the right value
> corresponding to (0x200000).

> So the problem now is that, when a function is invoked it is unable to
> fetch the right physical address, since my address mapping (System.map)
> does not change when I change the value of PAGE_OFFSET and recompile the
> kernel.

Well, this sounds very much like your vmlinux is relocated to the wrong 
adresses, and then it's not surprising it doesn't work. You definitely 
want to change arch/i386/vmlinux.lds.S. I'm not sure if you actually want 
to change PAGE_OFFSET, but I don't see a fundamental reason why it should 
be needed, so I think you should try as-is.

--Kai


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