linux-kernel - Re: [PATCH v4 8/8] LoongArch: Add ORC stack unwinder support

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Message-ID: <CAAhV-H5Xov4vg8ezSeHfDVRJF2t4Sj9jMLwNYZAKR3bsTGm6JA@mail.gmail.com>
Date:   Fri, 27 Oct 2023 17:31:01 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v4 8/8] LoongArch: Add ORC stack unwinder support

On Fri, Oct 27, 2023 at 5:25 PM Tiezhu Yang <yangtiezhu@...ngson.cn> wrote:
>
>
>
> On 10/27/2023 03:02 PM, Huacai Chen wrote:
> > v3 works in most cases, v4 cannot work completely (stop at show_stack), why?
>
> There are no obvious differences of this patch between v3 and v4.
>
> > [   61.642993] Call Trace:
> > [   61.642995] [<9000000002ad3808>] show_stack+0x40/0x17c
>
> I can not reproduce the above issue with this patch unless remove
> the option "-falign-functions" in arch/loongarch/Makefile, please
> make sure the option "-falign-functions" is in your test code.
A compiler issue? Can you try this one? Thanks.
https://mirrors.wsyu.edu.cn/fedora/linux/Yongbao/cross-toolchain/20231026/

Huacai

>
> Thanks,
> Tiezhu
>
>