From: Ulrich Drepper <drepper@redhat.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: ppc/ppc64 and x86 vsyscalls
Date: Tue, 09 Mar 2004 16:35:00 -0800 [thread overview]
Message-ID: <404E62B4.4000200@redhat.com> (raw)
In-Reply-To: <1078867992.9745.25.camel@gaston>
Benjamin Herrenschmidt wrote:
> /* In one place the actual function implementation */
> function_A_vers_1()
> function_A_vers_2()
> function_A_vers_3()
> function_B_vers_1()
> function_B_vers_2()
> etc .../...
>
> /* Then, some empty "stubs" for the symbol table that gets really
> * linked into user binaries. Those are the symbol table entries
> * that get patched
> */
> function_A() {}
> function_B() {}
>
> Sounds right ?
Basically yes. But you don't actually need the stub functions. You
just need a symbol table entry which can be arranged via an alias to any
one of the real functions.
--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
next prev parent reply other threads:[~2004-03-10 0:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-08 1:17 ppc/ppc64 and x86 vsyscalls Benjamin Herrenschmidt
2004-03-09 8:05 ` Ulrich Drepper
2004-03-09 11:05 ` Benjamin Herrenschmidt
2004-03-09 21:14 ` Ulrich Drepper
2004-03-09 21:33 ` Benjamin Herrenschmidt
2004-03-10 0:35 ` Ulrich Drepper [this message]
2004-03-10 2:08 ` Benjamin Herrenschmidt
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