Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <20230416173326.3995295-1-kernel@xen0n.name> <e593541e7995cc46359da3dd4eb3a69094e969e2.camel@xry111.site>
 <6ca642a9-62a6-00e5-39ac-f14ef36f6bdb@xen0n.name> <f54abfae989023fcfdabb4e9800a66847c357b85.camel@xry111.site>
 <CAAhV-H7zTjSsz=e+0r-9Z0KOF-Gxr-chXnVgWo+4eNA1ptWw1g@mail.gmail.com> <2e8d357d-e006-bda8-3711-dcbafbd4c53e@xen0n.name>
In-Reply-To: <2e8d357d-e006-bda8-3711-dcbafbd4c53e@xen0n.name>
From:   Huacai Chen <chenhuacai@kernel.org>
Date:   Sat, 22 Apr 2023 16:39:55 +0800
Message-ID: <CAAhV-H6PfjkYPYsBEzHY5i=74-tyqSHCRC65Fbz3O0Jaggypmg@mail.gmail.com>
Subject: Re: [PATCH 0/2] LoongArch: Make bounds-checking instructions useful
To:     WANG Xuerui <kernel@xen0n.name>
Cc:     Xi Ruoyao <xry111@xry111.site>, loongarch@lists.linux.dev,
        WANG Xuerui <git@xen0n.name>,
        Eric Biederman <ebiederm@xmission.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Arnd Bergmann <arnd@arndb.de>, linux-api@vger.kernel.org,
        linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On Thu, Apr 20, 2023 at 5:38=E2=80=AFPM WANG Xuerui <kernel@xen0n.name> wro=
te:
>
> On 2023/4/20 16:36, Huacai Chen wrote:
> > Hi, Xuerui,
> >
> > I hope V2 can be applied cleanly without the patch series "LoongArch:
> > Better backtraces", thanks.
>
> I believe it's already the case (just try; I've moved the BADV printing
> for BCE into the better backtraces series before sending this).
>
> I'm only waiting for comments from the other UAPI maintainers on the CC
> list.
You changed arch/loongarch/include/asm/kdebug.h, does it have
something to do with UAPI?
On the other hand, kprobe has dropped the notifier mechanism, so this
piece should be changed, I think.

+ /*
+ * notify the kprobe handlers, if instruction is likely to
+ * pertain to them.
+ */
+ if (notify_die(DIE_BOUNDS_CHECK, "Bounds check error", regs, 0,
+       current->thread.trap_nr, SIGSEGV) =3D=3D NOTIFY_STOP)
+ goto out;

Huacai

>
> --
> WANG "xen0n" Xuerui
>
> Linux/LoongArch mailing list: https://lore.kernel.org/loongarch/
>