From: Sven Schnelle <svens@linux.ibm.com>
To: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Florent Revest <revest@chromium.org>,
linux-trace-kernel@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
bpf <bpf@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,
Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Alan Maguire <alan.maguire@oracle.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v4 4/9] fprobe: rethook: Use ftrace_regs in fprobe exit handler and rethook
Date: Tue, 05 Sep 2023 09:17:02 +0200 [thread overview]
Message-ID: <yt9d5y4pozrl.fsf@linux.ibm.com> (raw)
In-Reply-To: <20230904224038.4420a76ea15931aa40179697@kernel.org> (Masami Hiramatsu's message of "Mon, 4 Sep 2023 22:40:38 +0900")
Masami Hiramatsu (Google) <mhiramat@kernel.org> writes:
> I found that this is not enough becuase s390/loongarch already implemented
> their rethook, and as far as I can see, the s390 ftrace_regs does not save
> the required registers for rethook. Thus, for such architecture, we need
> another kconfig flag and keep using the pt_regs for rethook.
Looking into arch_rethook_trampoline() i think we save all required
registers - which register do you think are missing? Or is there another
function i should look at?
next prev parent reply other threads:[~2023-09-05 7:18 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-23 15:15 [PATCH v4 0/9] bpf: fprobe: rethook: Use ftrace_regs instead of pt_regs Masami Hiramatsu (Google)
2023-08-23 15:15 ` [PATCH v4 1/9] Documentation: probes: Add a new ret_ip callback parameter Masami Hiramatsu (Google)
2023-08-25 16:11 ` Florent Revest
2023-08-23 15:15 ` [PATCH v4 2/9] fprobe: Use fprobe_regs in fprobe entry handler Masami Hiramatsu (Google)
2023-08-25 16:11 ` Florent Revest
2023-08-23 15:16 ` [PATCH v4 3/9] tracing: Expose ftrace_regs regardless of CONFIG_FUNCTION_TRACER Masami Hiramatsu (Google)
2023-08-23 15:16 ` [PATCH v4 4/9] fprobe: rethook: Use ftrace_regs in fprobe exit handler and rethook Masami Hiramatsu (Google)
2023-08-25 16:12 ` Florent Revest
2023-09-04 13:40 ` Masami Hiramatsu
2023-09-05 7:17 ` Sven Schnelle [this message]
2023-09-05 13:36 ` Masami Hiramatsu
2023-09-05 16:30 ` Steven Rostedt
2023-09-06 0:06 ` Masami Hiramatsu
2023-09-06 6:49 ` Sven Schnelle
2023-09-09 14:24 ` Masami Hiramatsu
2023-09-11 7:55 ` Sven Schnelle
2023-09-11 14:15 ` Masami Hiramatsu
2023-08-23 15:16 ` [PATCH v4 5/9] ftrace: Add ftrace_partial_regs() for converting ftrace_regs to pt_regs Masami Hiramatsu (Google)
2023-08-25 21:49 ` Andrii Nakryiko
2023-08-26 1:56 ` Masami Hiramatsu
2023-09-05 19:50 ` Andrii Nakryiko
2023-09-06 0:28 ` Masami Hiramatsu
2023-09-08 22:56 ` Andrii Nakryiko
2023-08-23 15:16 ` [PATCH v4 6/9] tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS Masami Hiramatsu (Google)
2023-08-25 16:12 ` Florent Revest
2023-08-26 3:38 ` Masami Hiramatsu
2023-08-30 7:20 ` Masami Hiramatsu
2023-08-23 15:16 ` [PATCH v4 7/9] bpf: Enable kprobe_multi feature if CONFIG_FPROBE is enabled Masami Hiramatsu (Google)
2023-08-23 15:16 ` [PATCH v4 8/9] Documentations: probes: Update fprobe document to use ftrace_regs Masami Hiramatsu (Google)
2023-08-23 15:17 ` [PATCH v4 9/9] Documentation: tracing: Add a note about argument and retval access Masami Hiramatsu (Google)
2023-08-25 16:12 ` Florent Revest
2023-08-25 16:11 ` [PATCH v4 0/9] bpf: fprobe: rethook: Use ftrace_regs instead of pt_regs Florent Revest
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