linux-kernel - Re: [RFC,v2] x86_64: save

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]

Date:	Tue, 18 Nov 2008 08:09:28 +0000
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	"Alexander van Heukelum" <heukelum@...lshack.com>
Cc:	"Ingo Molnar" <mingo@...e.hu>, "Andi Kleen" <andi@...stfloor.org>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Glauber Costa" <gcosta@...hat.com>,
	"LKML" <linux-kernel@...r.kernel.org>,
	"Nick Piggin" <nickpiggin@...oo.com.au>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [RFC,v2] x86_64: save_args out of line

>>> Alexander van Heukelum <heukelum@...lshack.com> 17.11.08 18:52 >>>
>The macro "interrupt" in entry_64.S generates a lot of code and it
>is used more and more often. This patch moves most of its contents
>into an external function. This saves anywhere between 500 and 2500
>bytes of text depending on the configuration.

Without numbers, I'd doubt that the code size reduction outweighs the
overhead of the extra call. Did you do any measurements?

>Dwarf2-annotations are most probably wrong or missing at all.

Indeed - do you have intentions to address this?

Jan

--
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/