From: "Paul D. DeRocco" <pderocco@ix.netcom.com>
To: <ecos-discuss@ecos.sourceware.org>
Subject: RE: [ECOS] pragma pack
Date: Wed, 09 Jan 2008 22:22:00 -0000 [thread overview]
Message-ID: <014701c8530d$ff055940$887ba8c0@PAULD> (raw)
In-Reply-To: <7b2a34230801091355n355da963lce9b0264e1c99653@mail.gmail.com>
> From: Bronislav Gabrhelik
>
> Beware of bad alignment of timestamp field. Some processors
> might raise an exception/interrupt when you use the int like
> operation directly on field (including assignment &
> evaluation). You should copy out/in this by memcpy into/from
> temporary variable of the same type when you need to do some
> integer computing on this field. In other case your code
> might not be portable.
I think that's the point of the __packed__ attribute: it forces the compiler
for any machine on which it matters to do the necessary byte
packing/unpacking automagically. I know that's what the Gnu ARM compiler
does.
--
Ciao, Paul D. DeRocco
Paul mailto:pderocco@ix.netcom.com
--
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next prev parent reply other threads:[~2008-01-09 22:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-09 14:19 Alexandre
2008-01-09 14:40 ` Andrew Lunn
2008-01-09 14:51 ` Bernard Fouché
2008-01-09 14:56 ` Alexandre
2008-01-09 21:55 ` Bronislav Gabrhelik
2008-01-09 22:22 ` Paul D. DeRocco [this message]
2008-01-09 23:50 ` [ECOS] " Grant Edwards
2008-01-10 0:50 ` Paul D. DeRocco
2008-01-10 9:43 ` Alexandre
2008-01-10 10:07 ` EXTERNAL Gladis Olaf (Praktikant; CR/AEM)
2008-01-10 10:29 ` Alexandre
2008-01-09 15:02 ` [ECOS] " EXTERNAL Gladis Olaf (Praktikant; CR/AEM)
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