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From: Jan Kiszka <jan.kiszka@domain.hid>
To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: adeos-main <adeos-main@gna.org>, Philippe Gerum <rpm@xenomai.org>
Subject: Re: [Adeos-main] [PATCH] x86: Don't instrument vdso functions
Date: Sun, 19 Oct 2008 19:51:37 +0200	[thread overview]
Message-ID: <48FB73A9.2000302@domain.hid> (raw)
In-Reply-To: <48FB6D40.5090903@domain.hid>

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Gilles Chanteperdrix wrote:
> Jan Kiszka wrote:
>> The mcount instrumentation is currently leaking into vdso functions.
>> Patch below fixes this (bits taken from 2.6.27).
> 
> What are these vdso functions? Functions called from user-space?

They belong to a virtual lib that is automatically mapped into every
process. They provide the same functionality like vsyscalls, but with a
different way to address them (VDSO is more flexible, vsyscalls are legacy).

Jan


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  reply	other threads:[~2008-10-19 17:51 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-19 17:07 [Adeos-main] [PATCH] x86: Don't instrument vdso functions Jan Kiszka
2008-10-19 17:24 ` Gilles Chanteperdrix
2008-10-19 17:51   ` Jan Kiszka [this message]
2008-10-19 17:52   ` Philippe Gerum
2008-10-19 17:56     ` Gilles Chanteperdrix

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