linux-kernel - Re: [PATCH v2 12/39] x86/ibt,ftrace: Search for __fentry_

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Message-ID: <20220225083647.12ceb54b@gandalf.local.home>
Date:   Fri, 25 Feb 2022 08:36:47 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Masami Hiramatsu <mhiramat@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        joao@...rdrivepizza.com, hjl.tools@...il.com, jpoimboe@...hat.com,
        andrew.cooper3@...rix.com, linux-kernel@...r.kernel.org,
        ndesaulniers@...gle.com, keescook@...omium.org,
        samitolvanen@...gle.com, mark.rutland@....com,
        alyssa.milburn@...el.com, mbenes@...e.cz,
        alexei.starovoitov@...il.com
Subject: Re: [PATCH v2 12/39] x86/ibt,ftrace: Search for __fentry__ location

On Fri, 25 Feb 2022 19:20:08 +0900
Masami Hiramatsu <mhiramat@...nel.org> wrote:

> > No. It only acts like ftrace_location_range(sym, sym_end) if the passed
> > in argument is the ip of the function (kallsyms returns offset = 0)  
> 
> Got it. So now ftrace_location() will return the ftrace address
> when the ip == func or ip == mcount-call.

Exactly! :-)

Are you OK with that?

-- Steve