linux-kernel - Re: [PATCH v2 0/4] Add uprobes support for LoongArch

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Message-ID: <8478fc34-01e9-2bdd-254b-982533ef3856@loongson.cn>
Date:   Mon, 17 Apr 2023 17:22:25 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Hengqi Chen <chenhengqi@...look.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        WANG Xuerui <kernel@...0n.name>
Cc:     loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v2 0/4] Add uprobes support for LoongArch



On 04/17/2023 11:17 AM, Hengqi Chen wrote:
> Hi Tiezhu:
>

...

>
> When I try to uprobe the pthread_spin_lock calls, the application core dumped.
> On X86, this will return -EINVAL instead of crashing the userspace application.
> Probably, we should add more opcode to insns_not_supported().
>

Yes, the atomic memory access instructions such as amswap_db.w
should not be supported, like llsc instructions, let me add them
in insns_not_supported(), thank you.

Thanks,
Tiezhu