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xen-devel
Re: [Xen-devel] Anybody debugging PAE guest kernels?
You want to talk to Kip Macy; I've done a little bit with
freebsd7 domus, (essentially, I have hacked makefiles to make Kip Macy's
stuff compile with -current of a few weeks ago instead of -current of a
few months ago) but I am lacking in both skill and time, so I probably
can not help you much.
I don't know of anyone working with FreeBSD on Xen PAE, though.
On Wed, 4 Oct 2006, Randy Thelen wrote:
Date: Wed, 4 Oct 2006 16:53:39 -0700
From: Randy Thelen <rthelen@xxxxxxxxxx>
To: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Anybody debugging PAE guest kernels?
Folks --
I'm porting FreeBSD to support PAE on xen-unstable. (Is anybody else doing
this?) The kernel image I have properly communicates to Xend that the kernel
is PAE aware and supports [extended-cr3] semantics (which I now fully
understand; thanks Keir!).
My kernel gets loaded into guest memory and I attach gdbserver-xen to it. So
far so good. I can view registers, I can step, I can look at global and
local registers. All is good.
But, if I attempt to modify memory, e.g., setting a break point, XEN coughs
up an error:
(XEN) DOM0: (file=mm.c, line=1750) Bad type (saw 2e000001 != exp e0000000)
for mfn fa693 (pfn 572)
(XEN) DOM0: (file=mm.c, line=618) Error getting mfn fa693 (pfn 572) from L1
entry 00000000fa693027 for dom7
Is anybody doing this? Or, am I out here alone ... again?
Xen version 3.0-unstable (root@xxxxxxxxxxxxxx) (gcc version 4.0.3 (Ubuntu
4.0.3-1ubuntu5)) Mon Aug 28 17:24:36 PDT 2006
Latest ChangeSet: Thu Aug 24 01:49:41 2006 +0100 11249:1ff4cc298bec
(I'm going to update my hg repository, but I still have the question about
anybody else using gdbserver w/ PAE guests.)
-- Randy
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