linux-kernel - Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA

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Date:   Mon, 20 Mar 2017 08:32:43 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Jiri Slaby <jslaby@...e.cz>
Cc:     mingo@...hat.com, tglx@...utronix.de, hpa@...or.com,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        xen-devel@...ts.xenproject.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v2 02/10] x86: assembly, FUNC_START for fn, DATA_START
 for data

On Mon, Mar 20, 2017 at 01:32:14PM +0100, Jiri Slaby wrote:
> This is a start of series to cleanup macros used for starting functions,
> data, globals etc. across x86. When we have all this sorted out, this
> will help to inject DWARF unwinding info by objtool later.
> 
> The goal is forcing SYM_FUNC_START to emit .cfi_startproc and
> SYM_FUNC_END to emit .cfi_endproc. Automatically at best.

Do we still want to emit .cfi_startproc/endproc from the macro?  From
our last discussion, that seemed to be up in the air.

  https://lkml.kernel.org/r/20170217211804.j6l2d7t5mfzqzmbt@treble

What did you think about making CFI read-only for .c object files and
write-only for .S object files?

-- 
Josh