linux-kernel - Re: [PATCH] riscv/entry: get correct syscall number from syscall_get

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Message-ID: <877c9t43jw.ffs@tglx>
Date: Sun, 27 Oct 2024 22:52:03 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Celeste Liu <coelacanthushex@...il.com>, Björn Töpel <bjorn@...nel.org>,
 Celeste Liu via B4 Relay <devnull+CoelacanthusHex.gmail.com@...nel.org>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Björn Töpel
 <bjorn@...osinc.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Palmer Dabbelt <palmer@...osinc.com>, Alexandre Ghiti <alex@...ti.fr>,
 "Dmitry V. Levin" <ldv@...ace.io>, Andrea Bolognani <abologna@...hat.com>,
 Felix Yan <felixonmars@...hlinux.org>, Ruizhe Pan <c141028@...il.com>,
 Shiqi Zhang <shiqi@...c.iscas.ac.cn>, Guo Ren <guoren@...nel.org>, Yao Zi
 <ziyao@...root.org>, Han Gao <gaohan@...as.ac.cn>,
 linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org
Subject: Re: [PATCH] riscv/entry: get correct syscall number from
 syscall_get_nr()

On Mon, Oct 28 2024 at 01:01, Celeste Liu wrote:
> On 2024-10-27 23:56, Thomas Gleixner wrote:
>> Equivalently you need to be able to modify orig_a0 for changing arg0,
>> no?
>
> Ok. 
>
> Greg, could you accept a backport a new API parameter for 
> PTRACE_GETREGSET/PTRACE_SETREGSET to 4.19 LTS branch?

Fix the problem properly and put a proper Fixes tag on it and worry
about the backport later.

Thanks,

        tglx