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From: Andreas Schwab <schwab@linux-m68k.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Subject: Re: passing NULL to clock_getres (VDSO): terminated by unexpected
 signal 11
References: <0fc22a08-31d9-e4d1-557e-bf5b482a9a20__6444.28012180782$1571503753$gmane$org@c-s.fr>
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Date: Sun, 20 Oct 2019 11:53:14 +0200
In-Reply-To: <ed65e4c6-2fe0-2f5c-f667-5a81b19eb073@c-s.fr> (Christophe Leroy's
 message of "Sun, 20 Oct 2019 11:20:00 +0200")
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Cc: Nathan Lynch <nathanl@linux.ibm.com>,
 "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
 Vincenzo Frascino <vincenzo.frascino@arm.com>
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 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

On Okt 20 2019, Christophe Leroy <christophe.leroy@c-s.fr> wrote:

> Le 19/10/2019 à 21:18, Andreas Schwab a écrit :
>> On Okt 19 2019, Christophe Leroy <christophe.leroy@c-s.fr> wrote:
>>
>>> Hi Nathan,
>>>
>>> While trying to switch powerpc VDSO to C version of gettimeofday(), I'm
>>> getting the following kind of error with vdsotest:
>>>
>>> passing NULL to clock_getres (VDSO): terminated by unexpected signal 11
>>>
>>> Looking at commit a9446a906f52 ("lib/vdso/32: Remove inconsistent NULL
>>> pointer checks"), it seems that signal 11 is expected when passing NULL
>>> pointer.
>>>
>>> Any plan to fix vdsotest ?
>>
>> Passing NULL to clock_getres is valid, and required to return
>> successfully if the clock id is valid.
>>
>
> Do you mean the following commit is wrong ?
>
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/lib/vdso?id=a9446a906f52292c52ecbd5be78eaa4d8395756c

If it causes a valid call to clock_getres to fail, then yes.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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