From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
To: David Ahern <dsahern@gmail.com>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
mingo@elte.hu, peterz@infradead.org, fweisbec@gmail.com,
paulus@samba.org, tglx@linutronix.de, anton@samba.org
Subject: Re: [PATCH] perf tool: fix endianness handling of u32 data in samples
Date: Fri, 2 Sep 2011 17:02:55 -0300 [thread overview]
Message-ID: <20110902200255.GG17970@ghostprotocols.net> (raw)
In-Reply-To: <1314992511-1235-1-git-send-email-dsahern@gmail.com>
Em Fri, Sep 02, 2011 at 01:41:51PM -0600, David Ahern escreveu:
> @@ -423,18 +449,25 @@ int perf_event__parse_sample(const union perf_event *event, u64 type,
> }
>
> if (type & PERF_SAMPLE_RAW) {
> - u32 *p = (u32 *)array;
> + u.val64 = *array;
> + if (swapped) {
> + /* undo swap of u64, then swap on individual u32s */
> + u.val64 = bswap_64(u.val64);
> + u.val32[0] = bswap_32(u.val32[0]);
> + u.val32[1] = bswap_32(u.val32[1]);
> +
> + WARN_ONCE(swapped, "Endianness of raw data not corrected!\n");
> + }
That works too, but then we'll be always testing swapped two times :-)
- Arnaldo
next prev parent reply other threads:[~2011-09-02 20:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-02 19:41 [PATCH] perf tool: fix endianness handling of u32 data in samples David Ahern
2011-09-02 20:02 ` Arnaldo Carvalho de Melo [this message]
2011-09-02 20:06 ` David Ahern
-- strict thread matches above, loose matches on Subject: below --
2011-08-29 21:55 David Ahern
2011-09-01 16:19 ` Arnaldo Carvalho de Melo
2011-09-01 16:41 ` David Ahern
2011-09-01 16:54 ` David Ahern
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