linux-kernel - Re: [PATCH v3 11/12] x86, boot: add fields to support load bzImage and ramdisk high

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Message-ID: <CAE9FiQUnPs-edobmpwTkyuFOrYziLjBBBxHgmND37+a64H-oHw@mail.gmail.com>
Date:	Sat, 24 Nov 2012 16:04:33 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Rob Landley <rob@...dley.net>,
	Matt Fleming <matt.fleming@...el.com>
Subject: Re: [PATCH v3 11/12] x86, boot: add fields to support load bzImage
 and ramdisk high

On Sat, Nov 24, 2012 at 3:50 PM, Eric W. Biederman
<ebiederm@...ssion.com> wrote:
>
> I believe all added variables between the last version of the boot
> protocol /sbin/kexec knows about and the current time were added in the
> initialized data section.  Certainly we can check and that will tell us
> how likely changes in arch/x86/boot/ have been regressions in the 32bit
> entry point support.
>
> As for solving this there is a simple solution.  Add a second jump
> right after the first jump.   The variables after the second jump can
> all be zero initialized.

could use .org to force start_of_setup start from 0x1000

but how about area before setup_header ? how it is full of EFI_STUB suff there.

Yinghai
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