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From: Shaheed <srhaque@iee.org>
To: Jan Frey <jan.frey@nokia.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] support for gzipped (ELF) core dumps
Date: Thu, 13 Jan 2005 13:29:51 +0000	[thread overview]
Message-ID: <200501131329.51555.srhaque@iee.org> (raw)
In-Reply-To: <1105617091.830.27.camel@borcx178>

On Thursday 13 January 2005 11:51, Jan Frey wrote:
> Hi,
>
> I tried to use those "in-kernel" functions, but they seem to do little
> different CRC calculations. Unfortunately I don't have any experiences
> with CRC stuff, anyone able to help here?

Do you know what polynomial you are trying to use? My first try wth Google 
gets me to:

http://www.cyphercalc.com/crctool.htm#LookupTables

not to mention a bunch of free sources such as:

http://www.repairfaq.org/filipg/LINK/F_crc_v35.html

which even implies that the pkzip polynomial *is* the standard one. If you 
really need the unrolled version for performance, at least use the right data 
types and/or consider to compute the tables at run time:

http://gcc.gnu.org/ml/gcc-patches/2002-04/msg01097.html


  reply	other threads:[~2005-01-13 13:33 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-08 17:27 [PATCH] support for gzipped (ELF) core dumps Shaheed
2005-01-13 11:51 ` Jan Frey
2005-01-13 13:29   ` Shaheed [this message]
2005-01-13 15:28   ` [PATCH] Updated: " Jan Frey
  -- strict thread matches above, loose matches on Subject: below --
2005-01-06 13:19 [PATCH] " Jan Frey
2005-01-06 13:30 ` linux-os
2005-01-06 13:43 ` Miquel van Smoorenburg

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