linux-kernel - Re: 2.6.28-rc3-git1: spitz still won't boot

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Message-ID: <bc64b4640811081512ta8bfd90m921760839bdf8ffa@mail.gmail.com>
Date:	Sun, 9 Nov 2008 02:12:47 +0300
From:	Dmitry <dbaryshkov@...il.com>
To:	"Richard Purdie" <rpurdie@...ys.net>
Cc:	"Russell King" <rmk+lkml@....linux.org.uk>,
	"Pavel Machek" <pavel@...e.cz>,
	"Eric Miao" <eric.y.miao@...il.com>, "Cyril Hrubis" <metan@....cz>,
	lenz@...wisc.edu, "kernel list" <linux-kernel@...r.kernel.org>,
	Dirk@...er-online.de, arminlitzel@....de, pavel.urban@...cz,
	thommycheck@...il.com
Subject: Re: 2.6.28-rc3-git1: spitz still won't boot

2008/11/8 Richard Purdie <rpurdie@...ys.net>:
>
> On Fri, 2008-11-07 at 18:23 +0000, Russell King wrote:
>> On Fri, Nov 07, 2008 at 05:57:33PM +0300, Dmitry wrote:
>> > 2008/11/7 Pavel Machek <pavel@...e.cz>:
>> > > On Fri 2008-11-07 21:23:41, Eric Miao wrote:
>> > >> Well, IIRC spitz still needs the patch to change the vmlinux.ld.S.
>> > >> Did you guys ever try that?
>> > >
>> > > I never heard about that patch, do you have it handy?
>> >
>> > http://rpsys.net/openzaurus/patches/archive/pxa-linking-bug.patch
>> >
>> > I plan to submit a bit modified version of this patch later.
>>
>> That doesn't look like something that should be accepted.  Take a moment
>> to put some thought into the question.  Why should we _allocate_ and
>> contain the stack in the resulting image?  Does the stack contain any
>> data that must be pre-initialized?
>>
>> Obviously not.
>
> Firstly, I don't think that patch should ever make it into a mainline
> kernel. I can perhaps give some clues why its required though. I think
> the bootloader on the zaurus truncates the image when writing the kernel
> into flash using the standard flashing process. By having that much
> extra padding on the end of the kernel, nothing important is lost.

>From what I do understand from updater.sh, the kernel is fully written to nand.
Otherwise there will be lot's more problems. Maybe w/o padding the image is
loaded too high? Can't verify ATM.

BTW: Since I'm away from my zaurii for few days, can one please send
me the whole
ROM (I mean the one at CS0, not NAND) image of any Zaurus device?

> How did the original 2.4 kernels ever work? Binutils used to be buggy
> and left this padding in. Nobody therefore ever noticed the bug in the
> bootloader.
>
> The above theory is guesswork based on the kernels I've seen work and
> not work and I wrote the patch mentioned above as a workaround a long
> time ago and more pressing issues meant I never got back to it. I'd love
> to see someone work out the problem for sure!

I did rewrote your patch in a bit cleaner way (to apply the hack to
vmlinux.lds.in
in a cleaner way and only on PXA_SHARPSL), however I'm not submitting it
till I find what's the real reason for this problem.

-- 
With best wishes
Dmitry
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