linux-kernel - Re: [PATCH perf/core 06/22] uprobes: Add is_register argument to uprobe_write and uprobe_write

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Message-ID: <CAEf4Bza9e1ixnLZgNjWrMZYZwrz2pByVnyfDywX7bUe5p5Kw3g@mail.gmail.com>
Date: Tue, 22 Apr 2025 16:48:19 -0700
From: Andrii Nakryiko <andrii.nakryiko@...il.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: Oleg Nesterov <oleg@...hat.com>, Peter Zijlstra <peterz@...radead.org>, 
	Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-trace-kernel@...r.kernel.org, x86@...nel.org, 
	Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, 
	John Fastabend <john.fastabend@...il.com>, Hao Luo <haoluo@...gle.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Alan Maguire <alan.maguire@...cle.com>, David Laight <David.Laight@...lab.com>, 
	Thomas Weißschuh <thomas@...ch.de>, 
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH perf/core 06/22] uprobes: Add is_register argument to
 uprobe_write and uprobe_write_opcode

On Mon, Apr 21, 2025 at 2:45 PM Jiri Olsa <jolsa@...nel.org> wrote:
>
> The uprobe_write has special path to restore the original page when we
> write original instruction back. This happens when uprobe_write detects
> that we want to write anything else but breakpoint instruction.
>
> Moving the detection away and passing it to uprobe_write as argument,
> so it's possible to write different instructions (other than just
> breakpoint and rest).
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  arch/arm/probes/uprobes/core.c |  2 +-
>  include/linux/uprobes.h        |  5 +++--
>  kernel/events/uprobes.c        | 22 +++++++++++-----------
>  3 files changed, 15 insertions(+), 14 deletions(-)
>

Acked-by: Andrii Nakryiko <andrii@...nel.org>


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