linux-kernel - Re: [RFC v1 0/8] x86/init: Linux linker tables

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <56A13D42.7040500@zytor.com>
Date:	Thu, 21 Jan 2016 12:19:14 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>, tglx@...utronix.de,
	mingo@...hat.com, bp@...en8.de, konrad.wilk@...cle.com,
	rusty@...tcorp.com.au, luto@...capital.net,
	boris.ostrovsky@...cle.com, mcb30@...e.org, jgross@...e.com,
	JBeulich@...e.com, joro@...tes.org, ryabinin.a.a@...il.com,
	andreyknvl@...gle.com, long.wanglong@...wei.com,
	qiuxishi@...wei.com, aryabinin@...tuozzo.com,
	mchehab@....samsung.com, valentinrothberg@...il.com,
	peter.senna@...il.com, x86@...nel.org,
	Michal Marek <mmarek@...e.com>, xen-devel@...ts.xensource.com,
	Michael Matz <matz@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [RFC v1 0/8] x86/init: Linux linker tables

On 12/17/15 20:40, H. Peter Anvin wrote:
>>
>> const struct
>> foo__attribute__((used,section(".rodata.tbl.tablename.0"))) tablename[0];
>>
>> const struct
>> foo__attribute__((used,section(".rodata.tbl.tablename.999")))
>> tablename__end[0];
>>

(Over)thinking about this some more, I suggest using the empty string
for the start and "~" for the end.  And, yes, I did check that ~ works
as part of a section name.

Something that confuses me is that gcc seems to give these sections the
"aw" attributes which makes as complain.  This might be a gcc bug.
Worst case we have to use an assembly statement to create these
sections; it isn't a big deal and shouldn't make it any more
architecture-specific.

	-hpa