linux-kernel - Re: [tip:x86/urgent] x86: Add back _end symbol that is missing from Symbol.map

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20091108114829.GQ11372@elte.hu>
Date:	Sun, 8 Nov 2009 12:48:29 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	hare@...e.de, akpm@...ux-foundation.org, tglx@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86: Add back _end symbol that is missing from
 Symbol.map


* Sam Ravnborg <sam@...nborg.org> wrote:

> On Sun, Nov 08, 2009 at 11:07:12AM +0000, tip-bot for Hannes Reinecke wrote:
> > Commit-ID:  d1e4d37b79e944f6351ae38eb1ca7c9f7b506e76
> > Gitweb:     http://git.kernel.org/tip/d1e4d37b79e944f6351ae38eb1ca7c9f7b506e76
> > Author:     Hannes Reinecke <hare@...e.de>
> > AuthorDate: Wed, 4 Nov 2009 07:19:32 -0800
> > Committer:  Ingo Molnar <mingo@...e.hu>
> > CommitDate: Sun, 8 Nov 2009 12:05:03 +0100
> > 
> > x86: Add back _end symbol that is missing from Symbol.map
> > 
> > With 2.6.31 'crash' on x86_64 falls flat on its face as the
> > '_end' symbol is missing from the System.map file.
> > 
> > The culprit is commit 091e52c3551d3031343df24b573b770b4c6c72b6,
> > which moved the '_end' symbol into it's own section.  Apparently
> > this causes kallsyms to not reference it properly.
> > 
> > So do not include _end in it's own section.
> > 
> > Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> > Cc: Sam Ravnborg <sam@...nborg.org>
> > Cc: <stable@...nel.org> # .31.x
> > LKML-Reference: <200911041519.nA4FJWEW030164@...p1.linux-foundation.org>
> > Signed-off-by: Ingo Molnar <mingo@...e.hu>
> 
> I'm afraid this will break a RELOCTABLE i386 kernel.
> 
> We fixed this up some time ago where we had to
> move the symbol definition inside a section
> to prevent the symbol being absolute.

ah, indeed. So ... the question is then, why did _end disappear from 
System.map?

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/