linux-kernel - Re: [PATCH v2 2/2] m68k: Cleanup linker scripts using new linker script macros.

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Message-ID: <m2ocowwngg.fsf@igel.home>
Date:	Sun, 27 Sep 2009 15:01:51 +0200
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Tim Abbott <tabbott@...lice.com>,
	Roman Zippel <zippel@...ux-m68k.org>,
	linux-m68k@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: [PATCH v2 2/2] m68k: Cleanup linker scripts using new linker  script macros.

Geert Uytterhoeven <geert@...ux-m68k.org> writes:

> On Wed, Sep 16, 2009 at 18:44, Tim Abbott <tabbott@...lice.com> wrote:
>> Signed-off-by: Tim Abbott <tabbott@...lice.com>
>> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
>> Cc: Roman Zippel <zippel@...ux-m68k.org>
>> Cc: linux-m68k@...ts.linux-m68k.org
>> Cc: Sam Ravnborg <sam@...nborg.org>
>
> This patch must do something wrong, as it now fails to boot on ARAnyM:
>
> | CPU: Double bus fault detected !
> | CPU: Halting
>
> Haven't investigated why yet, though...

The problem is that _end no longer matches the end of the load segment.
Previously, the .data.init_task section was the last allocated item in
the linker script, now the last item is an align.  This align does not
affect the memsize of the segment.  The startup code expects the boot
info to be placed at _end, but the boot loader puts it at the end of the
load segment, which is the best it can do.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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"And now for something completely different."
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