linux-kernel - Re: [PATCH 3/5] powerpc64: Add .opd based function descriptor dereference

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Message-ID: <20170916112535.GA495@tigerII.localdomain>
Date:   Sat, 16 Sep 2017 20:25:35 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:     "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        "James E . J . Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>, Petr Mladek <pmladek@...e.com>,
        linux-ia64@...r.kernel.org, linux-parisc@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org, Jessica Yu <jeyu@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev@...ts.ozlabs.org, Nicholas Piggin <npiggin@...il.com>
Subject: Re: [PATCH 3/5] powerpc64: Add .opd based function descriptor
 dereference

On (09/16/17 15:13), Naveen N. Rao wrote:
[..]
> Would it be simpler to just use kernel_text_address() and dereference 
> everything else? See commit 83e840c770f2c5 ("powerpc64/elfv1: Only 
> dereference function descriptor for non-text symbols") for a related 
> patch.

I had this idea, see

lkml.kernel.org/r/20170908172528.qc2vdtxzqh777k6o@...el.com


	-ss