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From: Andreas Schwab <schwab@suse.de>
To: Jiri Kosina <jkosina@suse.cz>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Abel Bernabeu <abelbg@m2grp.com>,
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Subject: Re: [Patch] Elf loader crash while zero-filling .bss
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Date: Mon, 11 Feb 2008 23:14:38 +0100
In-Reply-To: <Pine.LNX.4.64.0802112137360.30955@jikos.suse.cz> (Jiri Kosina's
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Jiri Kosina <jkosina@suse.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@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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"And now for something completely different."