linux-kernel - Re: [PATCH v9] kallsyms: Add self-test facility

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Date:   Thu, 15 Dec 2022 15:51:40 +0100
From:   Andreas Schwab <schwab@...ux-m68k.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Petr Mladek <pmladek@...e.com>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        linux-modules@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        David Laight <David.Laight@...lab.com>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        "Jason A. Donenfeld" <Jason@...c4.com>
Subject: Re: [PATCH v9] kallsyms: Add self-test facility

On Dez 15 2022, Geert Uytterhoeven wrote:

>     start
>     kallsyms_lookup_name() for kallsyms_test_func_static failed:
> addr=8dbc, expect 60308
>     kallsyms_lookup_name() for kallsyms_test_func failed: addr=8dbc,
> expect 60318
>     kallsyms_lookup_name() for kallsyms_test_func_weak failed:
> addr=8dbc, expect 6031a
>     kallsyms_lookup_name() for vmalloc failed: addr=8dbc, expect bdc88
>     kallsyms_lookup_name() for vfree failed: addr=8dbc, expect bd6de

Curiously addr always comes out the same.  What symbol does it resolve
to?

>     kallsyms_on_each_match_symbol() for kallsyms_test_func_static
> failed: count=24890, addr=1ee870, expect 60308
>     kallsyms_on_each_match_symbol() for kallsyms_test_func failed:
> count=24890, addr=1ee870, expect 60318
>     kallsyms_on_each_match_symbol() for kallsyms_test_func_weak
> failed: count=24890, addr=1ee870, expect 6031a
>     kallsyms_on_each_match_symbol() for vmalloc failed: count=24890,
> addr=1ee870, expect bdc88
>     kallsyms_on_each_match_symbol() for vfree failed: count=24890,
> addr=1ee870, expect bd6de

Here too.

-- 
Andreas Schwab, schwab@...ux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."