From: Steven Rostedt <rostedt@goodmis.org>
To: Jiri Olsa <olsajiri@gmail.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Ingo Molnar <mingo@redhat.com>, 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>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
LKML <linux-kernel@vger.kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC] ftrace: Add support to keep some functions out of ftrace
Date: Sun, 14 Aug 2022 07:32:15 -0400 [thread overview]
Message-ID: <20220814073215.0a030a45@rorschach.local.home> (raw)
In-Reply-To: <20220813150252.5aa63650@rorschach.local.home>
On Sat, 13 Aug 2022 15:02:52 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:
> Index: linux-trace.git/scripts/Makefile.lib
> ===================================================================
> --- linux-trace.git.orig/scripts/Makefile.lib
> +++ linux-trace.git/scripts/Makefile.lib
> @@ -233,7 +233,8 @@ objtool_args = \
> $(if $(CONFIG_HAVE_JUMP_LABEL_HACK), --hacks=jump_label) \
> $(if $(CONFIG_HAVE_NOINSTR_HACK), --hacks=noinstr) \
> $(if $(CONFIG_X86_KERNEL_IBT), --ibt) \
> - $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount) \
> + $(if $(filter $(shell basename $@),$(NO_MCOUNT_FILES)),, \
> + $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)) \
I believe there's some security and other validations that objtool does
that requires it to know about the mcount locations.
If BPF is doing something unique, and modifying code as well (outside
the jump label and ftrace work), does objtool need to know about that too?
-- Steve
> $(if $(CONFIG_UNWINDER_ORC), --orc) \
> $(if $(CONFIG_RETPOLINE), --retpoline) \
> $(if $(CONFIG_SLS), --sls) \
next prev parent reply other threads:[~2022-08-14 11:32 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
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[not found] ` <20220722120854.3cc6ec4b@gandalf.local.home>
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2022-08-13 19:02 ` [RFC] ftrace: Add support to keep some functions out of ftrace Steven Rostedt
2022-08-14 11:32 ` Steven Rostedt [this message]
2022-08-14 15:22 ` Jiri Olsa
2022-08-15 2:07 ` Chen Zhongjin
2022-08-15 8:04 ` Jiri Olsa
2022-08-15 11:01 ` Björn Töpel
2022-08-15 11:29 ` Jiri Olsa
2022-08-15 12:19 ` Björn Töpel
2022-08-15 12:30 ` Björn Töpel
2022-08-15 8:03 ` Peter Zijlstra
2022-08-15 9:44 ` Jiri Olsa
2022-08-15 12:37 ` Peter Zijlstra
2022-08-15 14:25 ` Alexei Starovoitov
2022-08-15 14:33 ` Peter Zijlstra
2022-08-15 14:45 ` Alexei Starovoitov
2022-08-15 15:02 ` Peter Zijlstra
2022-08-15 15:17 ` Alexei Starovoitov
2022-08-15 15:28 ` Peter Zijlstra
2022-08-15 15:35 ` Alexei Starovoitov
2022-08-15 15:44 ` Steven Rostedt
2022-08-15 15:53 ` Alexei Starovoitov
2022-08-15 16:13 ` Steven Rostedt
2022-08-15 15:48 ` Peter Zijlstra
2022-08-16 6:56 ` Jiri Olsa
2022-08-17 9:29 ` Jiri Olsa
2022-08-17 16:57 ` Alexei Starovoitov
2022-08-17 19:39 ` Jiri Olsa
2022-08-15 15:41 ` Peter Zijlstra
2022-08-15 15:49 ` Alexei Starovoitov
2022-08-15 16:08 ` Steven Rostedt
2022-08-18 20:27 ` Jiri Olsa
2022-08-18 20:50 ` Steven Rostedt
2022-08-18 21:00 ` Alexei Starovoitov
2022-08-18 21:05 ` Steven Rostedt
2022-08-18 21:32 ` Jiri Olsa
2022-08-19 11:45 ` Jiri Olsa
2022-08-23 17:23 ` Alexei Starovoitov
2022-08-26 8:00 ` Jiri Olsa
2022-08-18 21:14 ` Jiri Olsa
2022-08-15 15:32 ` Steven Rostedt
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