From: Steven Rostedt <rostedt@goodmis.org>
To: Jiri Olsa <jolsa@redhat.com>
Cc: "Andrii Nakryiko" <andrii.nakryiko@gmail.com>,
"Jiri Olsa" <jolsa@kernel.org>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andriin@fb.com>,
Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
"Martin KaFai Lau" <kafai@fb.com>,
"Song Liu" <songliubraving@fb.com>, "Yonghong Song" <yhs@fb.com>,
"John Fastabend" <john.fastabend@gmail.com>,
"KP Singh" <kpsingh@chromium.org>, "Daniel Xu" <dxu@dxuuu.xyz>,
"Jesper Brouer" <jbrouer@redhat.com>,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
"Viktor Malik" <vmalik@redhat.com>
Subject: Re: [PATCHv2 RFC bpf-next 0/7] bpf: Add support for ftrace probe
Date: Thu, 15 Apr 2021 14:21:20 -0400 [thread overview]
Message-ID: <20210415142120.7427b4bd@gandalf.local.home> (raw)
In-Reply-To: <20210415141831.7b8fbe72@gandalf.local.home>
On Thu, 15 Apr 2021 14:18:31 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:
> My last release of that code is here:
>
> https://lore.kernel.org/lkml/20190525031633.811342628@goodmis.org/
>
> It allows you to "reserve data" to pass from the caller to the return, and
> that could hold the arguments. See patch 15 of that series.
Note that implementation only lets you save up to 4 words on the stack, but
that can be changed. Or you could have a separate shadow stack for saving
arguments, and only pass the pointer to the location on the other stack
where those arguments are.
-- Steve
next prev parent reply other threads:[~2021-04-15 18:21 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 12:15 [PATCHv2 RFC bpf-next 0/7] bpf: Add support for ftrace probe Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 1/7] bpf: Move bpf_prog_start/end functions to generic place Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 2/7] bpf: Add bpf_functions object Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 3/7] bpf: Add support to attach program to ftrace probe Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 4/7] libbpf: Add btf__find_by_pattern_kind function Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 5/7] libbpf: Add support to load and attach ftrace probe Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 6/7] selftests/bpf: Add ftrace probe to fentry test Jiri Olsa
2021-04-13 12:15 ` [PATCHv2 RFC bpf-next 7/7] selftests/bpf: Add ftrace probe test Jiri Olsa
2021-04-14 1:04 ` [PATCHv2 RFC bpf-next 0/7] bpf: Add support for ftrace probe Andrii Nakryiko
2021-04-14 12:19 ` Jiri Olsa
2021-04-14 22:46 ` Andrii Nakryiko
2021-04-15 14:00 ` Jiri Olsa
2021-04-15 15:10 ` Steven Rostedt
2021-04-15 17:39 ` Jiri Olsa
2021-04-15 18:18 ` Steven Rostedt
2021-04-15 18:21 ` Steven Rostedt [this message]
2021-04-15 21:49 ` Jiri Olsa
2021-04-15 23:30 ` Steven Rostedt
2021-04-19 20:51 ` Jiri Olsa
2021-04-19 22:00 ` Steven Rostedt
2021-04-15 18:31 ` Yonghong Song
2021-04-15 20:45 ` Andrii Nakryiko
2021-04-15 21:00 ` Steven Rostedt
2021-04-16 15:03 ` Masami Hiramatsu
2021-04-16 16:48 ` Steven Rostedt
2021-04-19 14:29 ` Masami Hiramatsu
2021-04-20 12:51 ` Jiri Olsa
2021-04-20 15:33 ` Alexei Starovoitov
2021-04-20 16:33 ` Steven Rostedt
2021-04-20 16:52 ` Jiri Olsa
2021-04-20 23:38 ` Alexei Starovoitov
2021-04-21 13:40 ` Jiri Olsa
2021-04-21 14:05 ` Steven Rostedt
2021-04-21 18:52 ` Andrii Nakryiko
2021-04-21 19:18 ` Jiri Olsa
2021-04-22 14:24 ` Steven Rostedt
2021-04-21 21:37 ` Jiri Olsa
2021-04-22 1:17 ` Steven Rostedt
2021-04-20 4:51 ` Andrii Nakryiko
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