linux-kernel - Re: [PATCH 2/3] perf annotate: Parse x86 SIB addressing properly

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Message-ID: <CAP-5=fX8N4JRseytuACXMZF7Gw8Uu15kBg7dXN2iZZg0_nG-Sg@mail.gmail.com>
Date:   Mon, 15 May 2023 10:08:52 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 2/3] perf annotate: Parse x86 SIB addressing properly

On Wed, May 10, 2023 at 11:27 PM Namhyung Kim <namhyung@...nel.org> wrote:
>
> When the source argument of mov instruction is look like below, it didn't
> parse the whole operand and just stopped at the first comma.
>
>   mov    (%rbx,%rax,1),%rcx
>
> Fix it by checking the parentheses and move it to the closing one.
>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>

Acked-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> ---
>  tools/perf/util/annotate.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index ca9f0add68f4..6053ddf9c32d 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -550,6 +550,19 @@ static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map_sy
>                 return -1;
>
>         *s = '\0';
> +
> +       /*
> +        * x86 SIB addressing has something like 0x8(%rax, %rcx, 1)
> +        * then it needs to have the closing parenthesis.
> +        */
> +       if (strchr(ops->raw, '(')) {
> +               *s = ',';
> +               s = strchr(ops->raw, ')');
> +               if (s == NULL || s[1] != ',')
> +                       return -1;
> +               *++s = '\0';
> +       }
> +
>         ops->source.raw = strdup(ops->raw);
>         *s = ',';
>
> --
> 2.40.1.521.gf1e218fcd8-goog
>