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Re: [Xen-devel] [PATCH 1/3] Add support for OpenBSD

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 1/3] Add support for OpenBSD
From: Anil Madhavapeddy <anil@xxxxxxxxxxxxx>
Date: 2006年10月18日 17:34:09 +0100
Cc: Christoph Egger <Christoph.Egger@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: 2006年10月19日 09:30:06 -0700
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On 18 Oct 2006, at 17:27, Keir Fraser wrote:
On 18/10/06 17:17, "Anil Madhavapeddy" <anil@xxxxxxxxxxxxx> wrote:
I applied your second patch, but not the third (SSP/ProPolice) one
as I
don't understand why it's needed. If there's some extra magic in
OpenBSD's
gcc, I hope there is a flag we can specify to turn it off for the
hypervisor
itself.
It's enabled by default in OpenBSD's modified gcc-3.3.5, turn it off
with CFLAGS+= -fno-stack-protector
We have that already in arch/x86/Rules.mk. If that was working, I doubt
Christoph would have gone to the trouble of hacking up the SSP goop.
That flag definitely works.
I think Christoph wanted to get stack protection working, as all the other OpenBSD bits (kernel/userland) use it. There isn't much to it beyond adding the stack smash handler, and the stack frame format changes a bit...
-anil
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