linux-kernel - Re: [PATCH v4 2/2] ARM: ftrace: Add MODULE

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, 13 Mar 2018 17:51:02 +0000
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Alexander Sverdlin <alexander.sverdlin@...ia.com>
Cc:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King <linux@...linux.org.uk>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v4 2/2] ARM: ftrace: Add MODULE_PLTS support

On 13 March 2018 at 17:49, Alexander Sverdlin
<alexander.sverdlin@...ia.com> wrote:
> On 13/03/18 18:39, Ard Biesheuvel wrote:
>> if (IS_ENABLED(CONFIG_ARM_MODULE_PLTS))
>>     module_plt_alloc_fixed();
>
> Do you consider this a legal C code if without module-plts.o the function would not exist at all?
> That's too much relying on optimizer I think...
>

Yes, we rely on that in many different places in the kernel.