From: "H. Peter Anvin" <hpa@zytor.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "Huang, Ying" <ying.huang@intel.com>, Andi Kleen <ak@suse.de>,
"Eric W. Biederman" <ebiederm@xmission.com>,
akpm@linux-foundation.org,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH -v7 1/3] x86 boot: setup data
Date: Tue, 23 Oct 2007 15:32:15 -0700 [thread overview]
Message-ID: <471E766F.7020203@zytor.com> (raw)
In-Reply-To: <471E73AB.4050100@goop.org>
Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
>> No, he doesn't. The boot protocol version is communication between
>> the boot loader and the kernel (specifically, it is communication FROM
>> the kernel TO the bootloader), not between internal bits of the
>> kernel. Th
>
> So the bootloader will only fill out fields the kernel claims to understand?
>
Correct. If it fails to respect this restriction, it might even
overwrite kernel code. To make the bootloader's job easier, we have
retconned the jump instruction at the beginning of the header to also be
a limit marker.
-hpa
next prev parent reply other threads:[~2007-10-23 22:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-23 8:06 [PATCH -v7 1/3] x86 boot: setup data Huang, Ying
2007-10-23 22:08 ` Jeremy Fitzhardinge
2007-10-23 22:15 ` H. Peter Anvin
2007-10-23 22:20 ` Jeremy Fitzhardinge
2007-10-23 22:32 ` H. Peter Anvin [this message]
2007-10-23 22:52 ` H. Peter Anvin
2007-10-23 23:26 ` Jeremy Fitzhardinge
2007-10-23 23:18 ` Andi Kleen
2007-10-23 23:55 ` H. Peter Anvin
2007-10-24 3:08 ` Huang, Ying
2007-10-24 22:48 ` Andrew Morton
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