linux-kernel - Re: [PATCH] Add VDSO time function support for x86 32-bit kernel

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: <f984cb31-baa5-4176-8e85-37266e2cfb8d@email.android.com>
Date:	Wed, 12 Dec 2012 22:47:31 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Stefani Seibold <stefani@...bold.net>
CC:	linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
	mingo@...hat.com, ak@...ux.intel.com, aarcange@...hat.com,
	john.stultz@...aro.org, luto@...capital.net
Subject: Re: [PATCH] Add VDSO time function support for x86 32-bit kernel

Should be a simple matter of sharing pages.  Look perhaps at the x32 vdso for a hint.

Stefani Seibold <stefani@...bold.net> wrote:

>Am Mittwoch, den 12.12.2012, 22:14 -0800 schrieb H. Peter Anvin:
>> This is too late for 3.8 anyway, so there is time to make it work
>correctly before tge 3.9 merge window anyway.  After this merge window
>is over I may pull tjis into a testing branch, but compat support is a
>precondition.
>> 
>> The vdso is only optional if you build in backwards compatibility
>anyway, and software has a right to expect a specific numeric kernel
>version to export a single ABI.
>> 
>
>Any idea or clean solution how i can map the 64 bit vgtod into the 32
>bit address space? Thats the only problem i see.
>
>- Stefani

-- 
Sent from my mobile phone. Please excuse brevity and lack of formatting.
--
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/