From: Stefan Smietanowski <stesmi@stesmi.com>
To: GOTO Masanori <gotom@debian.or.jp>
Cc: Matthew Wilcox <willy@debian.org>,
Jeff Garzik <jgarzik@pobox.com>, Adrian Bunk <bunk@fs.tum.de>,
239952@bugs.debian.org, debian-devel@lists.debian.org,
linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: Binary-only firmware covered by the GPL?
Date: Fri, 26 Mar 2004 09:53:57 +0100 [thread overview]
Message-ID: <4063EFA5.5070001@stesmi.com> (raw)
In-Reply-To: <81ptb0wh45.wl@omega.webmasters.gr.jp>
Hi GOTO.
> But think about: why can we distribute assembler only code in linux
> kernel? It's near to binary form (objdump -d is your friend).
It's not. The difference is that we can always insert another asm
statement anywhere (of course changing the way the function works)
and still have it assemble and unless we goofed up it'll still run.
mov ax,ax for instance won't do a thing. We can insert that
anywhere we wish without changing anything. The assembler will take
care of any relative jumps and pointers but with a binary firmware,
try to insert a byte into it (not CHANGE one, INSERT one), even
if you know just insert a NOP somewhere - and see what happens.
// Stefan
next prev parent reply other threads:[~2004-03-26 8:55 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1B6Izr-0002Ai-00@r063144.stusta.swh.mhn.de>
[not found] ` <20040325082949.GA3376@gondor.apana.org.au>
2004-03-25 22:08 ` Binary-only firmware covered by the GPL? Adrian Bunk
2004-03-25 22:31 ` Jeff Garzik
2004-03-25 22:47 ` Adrian Bunk
2004-03-25 22:53 ` Stefan Smietanowski
2004-03-26 0:33 ` John Hasler
2004-03-26 0:17 ` David Woodhouse
2004-03-26 1:30 ` John Hasler
2004-03-26 8:50 ` Stefan Smietanowski
2004-03-26 9:43 ` Dumitru Ciobarcianu
2004-03-26 10:14 ` Stefan Smietanowski
2004-03-26 0:33 ` Matthew Wilcox
2004-03-26 1:07 ` GOTO Masanori
2004-03-26 1:39 ` John Hasler
2004-03-26 2:06 ` David Schwartz
2004-03-26 2:59 ` Chris Cheney
2004-03-26 3:23 ` John Hasler
2004-03-26 8:53 ` Stefan Smietanowski [this message]
2004-03-26 9:12 ` John Bradford
2004-03-26 13:59 ` John Hasler
2004-03-27 9:19 ` John Bradford
2004-03-26 0:41 ` David Schwartz
2004-03-26 11:20 ` Giuliano Pochini
2004-03-26 11:55 ` Stefan Smietanowski
2004-03-25 22:54 ` Chris Cheney
2004-03-26 0:41 ` David Schwartz
2004-03-26 9:09 ` John Bradford
2004-03-26 13:16 ` Eduard Bloch
2004-03-26 14:19 ` Stefan Smietanowski
2004-03-26 14:29 ` Eduard Bloch
2004-03-26 14:38 ` Stefan Smietanowski
2004-03-26 14:55 ` Eduard Bloch
2004-03-26 15:03 ` Stefan Smietanowski
2004-03-26 15:10 ` Matthew Wilcox
2004-03-26 15:22 ` Guy
2004-03-26 15:53 ` Gabor Gombas
2004-03-26 21:57 ` Valdis.Kletnieks
2004-03-30 11:39 ` Pavel Machek
2004-03-30 14:02 ` Stefan Smietanowski
2004-03-30 18:11 ` Goswin von Brederlow
2004-04-02 20:53 ` Pavel Machek
2004-03-26 15:04 Matt Reuther
2004-03-26 15:20 ` Matthew Garrett
2004-03-26 22:10 ` David Schwartz
[not found] <8RnZwD.A.91B.qHYaAB@murphy>
2004-03-30 14:57 ` Humberto Massa
2004-03-30 16:51 ` Henning Makholm
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