From: Klaus Kusche <klaus.kusche@computerix.info>
To: Nathan Chancellor <nathan@kernel.org>,
Josh Poimboeuf <jpoimboe@kernel.org>
Cc: peterz@infradead.org, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev, Nick Desaulniers <ndesaulniers@google.com>
Subject: Re: "Bad or missing .orc_unwind table. Disabling unwinder." Clang 19 problem? 6.12.8 problem?
Date: Tue, 14 Jan 2025 10:59:44 +0100 [thread overview]
Message-ID: <46c1ffa7-7531-4d4c-b302-e3ae244b57a4@computerix.info> (raw)
In-Reply-To: <20250114095159.GA1580513@ax162>
Hello,
On 14/01/2025 10:51, Nathan Chancellor wrote:
> Hi Josh,
>
>> Nathan, I think this is a Clang 19 issue, where one of the jump table
>> entries is pointing past the end of the function. When we saw this in
>> the past I think it was due to some leftover optimization, where the
>> jump table entry ended up unused so it was harmless. Are you aware of
>> any recent bugs in that area?
>
> I am not aware of any recent bugs there but if you or Klaus have a
> configuration file that triggers this, I would be happy to bisect LLVM
> to see what change introduced it to give us a better understanding of
> what is happening here.
Kernel .config files are attached to both
https://bugzilla.kernel.org/show_bug.cgi?id=219685
https://bugzilla.kernel.org/show_bug.cgi?id=219686
--
Prof. Dr. Klaus Kusche
Privat: Söllmnitz 32 d, D-07554 Gera/Söllmnitz
036695/859909 klaus.kusche@computerix.info https://www.computerix.info
Dienstlich: DHGE Gera, Weg der Freundschaft 4, D-07546 Gera
0365/4341-306 klaus.kusche@dhge.de https://www.dhge.de
next prev parent reply other threads:[~2025-01-14 10:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <b248a0fb-e182-42e3-abf5-83945ee992f6@computerix.info>
[not found] ` <20250113214122.g4lluwpzj3tnamx3@jpoimboe>
2025-01-13 23:58 ` "Bad or missing .orc_unwind table. Disabling unwinder." Clang 19 problem? 6.12.8 problem? Josh Poimboeuf
2025-01-14 9:51 ` Nathan Chancellor
2025-01-14 9:59 ` Klaus Kusche [this message]
2025-01-14 17:18 ` Nathan Chancellor
2025-05-29 13:56 ` 6.15.0: objtool "unexpected end of section" errors with clang 20.1.5 and lto Klaus Kusche
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