linux-kernel - Re: [Patch] Elf loader crash while zero-filling .bss

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Message-ID: <jeabm7nnsh.fsf@sykes.suse.de>
Date:	Mon, 11 Feb 2008 23:14:38 +0100
From:	Andreas Schwab <schwab@...e.de>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Abel Bernabeu <abelbg@...rp.com>,
	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org
Subject: Re: [Patch] Elf loader crash while zero-filling .bss

Jiri Kosina <jkosina@...e.cz> writes:

> On Mon, 11 Feb 2008, H. Peter Anvin wrote:
>
>
>> > Now, the question is whether it is valid for ELF binary to not have the end
>> > of .bss section (if present at all) not page-aligned.
>> Why wouldn't it be?  It would, however, be valid to the kernel to round it up
>> to the next boundary.
>
> I wasn't immediately sure if there is nothing in ELF specification that 
> would forbid that.

The only requirement for a loadable segment is that its address is
congruent modulo alignment with the file offset.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@...e.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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