linux-kernel - Re: [PATCH v2 9/9] objtool: Ignore exc_double_fault() _

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Message-ID: <CAKwvOdn9r96UznjbghdceDXyZxsrsvwj99Noxw=u3Ak_kBvacQ@mail.gmail.com>
Date:   Fri, 14 Apr 2023 14:16:50 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Miroslav Benes <mbenes@...e.cz>,
        linux-toolchains <linux-toolchains@...r.kernel.org>
Subject: Re: [PATCH v2 9/9] objtool: Ignore exc_double_fault() __noreturn warnings

On Thu, Apr 13, 2023 at 2:24 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Wed, Apr 12, 2023 at 12:03:24PM -0700, Josh Poimboeuf wrote:
> > +      *   - have compiler communicate __noreturn functions somehow

Could probably stuff these in some kind of "noreturn function symbol
table"/custom elf section; DWARF tags are nice but we don't always
want debug info.  (I should ask colleagues if there's anything like
this in DWARF already, perhaps for DWARFv6).

>
> This, we're going to have to do that -- because keeping that (ever
> growing) list in sync is going to be a pain in the backside.
>


-- 
Thanks,
~Nick Desaulniers