linux-kernel - Re: linker-tables v5 testing

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Message-ID: <20161201162039.602da20a@roar.ozlabs.ibm.com>
Date:   Thu, 1 Dec 2016 16:20:39 +1100
From:   Nicholas Piggin <npiggin@...il.com>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     "H. Peter Anvin" <hpa@...or.com>, Michael Matz <matz@...e.de>,
        Arnd Bergmann <arnd@...db.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Fengguang Wu <fengguang.wu@...el.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Wang Nan <wangnan0@...wei.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Borislav Petkov <bp@...en8.de>, Joerg Roedel <joro@...tes.org>
Subject: Re: linker-tables v5 testing

On Thu, 1 Dec 2016 16:04:30 +1100
Nicholas Piggin <npiggin@...il.com> wrote:

> On Wed, 30 Nov 2016 19:15:27 -0800
> "Luis R. Rodriguez" <mcgrof@...nel.org> wrote:
> 
> > On Wed, Nov 30, 2016 at 6:51 PM, Nicholas Piggin <npiggin@...il.com> wrote:
> > > On Wed, 30 Nov 2016 18:38:16 +0100
> > > "Luis R. Rodriguez" <mcgrof@...nel.org> wrote:
> > >  
> > >> On Wed, Nov 30, 2016 at 02:09:47PM +1100, Nicholas Piggin wrote:
> 
> > >> What is wrong with that ? Separating linker table and section ranges is  
> > >
> > > It's not that you separate those, of course you need that. It's that
> > > you also separate other sections from the input section descriptions:
> > >
> > > -               *(.text.hot .text .text.fixup .text.unlikely)           \
> > > +               *(.text.hot .text)                                      \
> > > +               *(SORT(.text.rng.*))                                    \
> > > +               *(.text.fixup .text.unlikely)                           \

Ahh, you're doing it to avoid clash with compiler generated sections.
The usual way to cope with that seems to be to use two dots for your name.
.text..rng.*