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From: "H. Peter Anvin" <hpa@zytor.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: initramfs buffer spec -- second draft
Date: Sun, 13 Jan 2002 12:11:57 -0800	[thread overview]
Message-ID: <3C41EA0D.2050205@zytor.com> (raw)
In-Reply-To: <a1oqmm$is3$1@cesium.transmeta.com> <m1ofjyqb7t.fsf@frodo.biederman.org>

Eric W. Biederman wrote:

> 
> Comments.  Endian issues are not specified, is the data little, big
> or vax endian?
> 


Not applicable.  There are no endian-specific binary structure in the 
format AT ALL.  ASCII-coded fields are always bigendian.


> What is the point of alignment?  If the data starts as 4 byte aligned,
> the 6 byte magic string guarantees the data will be only 2 byte
> aligned.  This isn't good for 32 or 64 bit architectures.


They're ASCII-coded, so it supposedly doesn't matter (yet, it's a bit 
daft, but blame the SysV people.)  The alignment makes sure the *data* 
field is 4-byte aligned.


> I do like having a c_magic that at least allows us to change things
> in the future if necessary.


It's pretty clear from a lot of the comments that a number of people 
haven't understood that the cpio encapsulation *THIS IS A CODIFICATION 
OF AN EXISTING FORMAT.*

	-hpa



  reply	other threads:[~2002-01-13 20:12 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-01-12  8:04 initramfs buffer spec -- second draft H. Peter Anvin
2002-01-13 19:43 ` Daniel Phillips
2002-01-13 20:08   ` H. Peter Anvin
2002-01-13 19:53 ` Eric W. Biederman
2002-01-13 20:11   ` H. Peter Anvin [this message]
2002-01-13 20:58     ` Eric W. Biederman
2002-01-13 21:59       ` Alexander Viro
2002-01-13 22:35         ` Eric W. Biederman
2002-01-14 18:31       ` Kai Henningsen
2002-01-15  0:26         ` H. Peter Anvin
2002-01-13 20:39   ` Alexander Viro
2002-01-15  6:34     ` Daniel Phillips
2002-01-16 19:19       ` [offtopic] duplicate mails (was: initramfs buffer spec -- second draft) Daniel Phillips
2002-01-15  6:34     ` initramfs buffer spec -- second draft Daniel Phillips
2002-01-15  6:54     ` Daniel Phillips
2002-01-16 20:40       ` Bill Davidsen
2002-01-15 15:15     ` Daniel Phillips
2002-01-15 20:03       ` H. Peter Anvin
2002-01-15 20:16         ` Daniel Phillips
2002-01-15 20:14           ` H. Peter Anvin
2002-01-15 23:01             ` Daniel Phillips
2002-01-15 23:47               ` H. Peter Anvin
2002-01-15 21:04           ` Andreas Dilger
2002-01-15 23:09             ` Daniel Phillips
2002-01-15 23:48               ` H. Peter Anvin
2002-01-15 23:59               ` Andreas Dilger
2002-01-16  0:29                 ` H. Peter Anvin
2002-01-16  3:33                 ` H. Peter Anvin
2002-01-16  3:25           ` Alexander Viro
2002-01-16  2:43   ` Aaron Lehmann
     [not found] <200201120804.AAA19339@cesium.transmeta.com>
2002-01-13  2:00 ` Alexander Viro
2002-01-13  2:17   ` H. Peter Anvin
2002-01-13  4:11     ` Alexander Viro
2002-01-13 19:55   ` Eric W. Biederman

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