linux-kernel - Re: [RFC PATCH v3 2/4] objtool: x86 instruction decoder and big endian cross compiles

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Message-ID: <20201002151841.4ojt45mtcpkylvdq@treble>
Date:   Fri, 2 Oct 2020 10:18:41 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Vasily Gorbik <gor@...ux.ibm.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        David Laight <David.Laight@...lab.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Miroslav Benes <mbenes@...e.cz>,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Julien Thierry <jthierry@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 2/4] objtool: x86 instruction decoder and big
 endian cross compiles

On Thu, Oct 01, 2020 at 12:17:25AM +0200, Vasily Gorbik wrote:
> From: Martin Schwidefsky <schwidefsky@...ibm.com>
> 
> Currently objtool seems to be the only tool from build tools needed
> which breaks x86 cross compilation on big endian systems. Make the x86
> instruction decoder of the objtool usable on big endian machines.
> 
> Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
> Co-developed-by: Vasily Gorbik <gor@...ux.ibm.com>
> Signed-off-by: Vasily Gorbik <gor@...ux.ibm.com>

Since this changes the decoder (which is shared with the kernel), please
prefix the subject with "x86/insn:" instead of "objtool".

This patch is a bit ugly, but I don't necessarily have a better idea.

Masami?

-- 
Josh