Date: Sun, 21 Nov 2004 17:12:55 -0800 (PST)
From: Linus Torvalds <torvalds@osdl.org>
To: Davide Libenzi <davidel@xmailserver.org>
cc: Daniel Jacobowitz <dan@debian.org>, Eric Pouech <pouech-eric@wanadoo.fr>,
       Roland McGrath <roland@redhat.com>, Mike Hearn <mh@codeweavers.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>, wine-devel <wine-devel@winehq.com>
Subject: Re: ptrace single-stepping change breaks Wine
In-Reply-To: <Pine.LNX.4.58.0411211511090.11274@bigblue.dev.mdolabs.com>
Message-ID: <Pine.LNX.4.58.0411211707280.20993@ppc970.osdl.org>
References: <200411152253.iAFMr8JL030601@magilla.sf.frob.com>
 <419E42B3.8070901@wanadoo.fr> <Pine.LNX.4.58.0411191119320.2222@ppc970.osdl.org>
 <419E4A76.8020909@wanadoo.fr> <Pine.LNX.4.58.0411191148480.2222@ppc970.osdl.org>
 <419E5A88.1050701@wanadoo.fr> <20041119212327.GA8121@nevyn.them.org>
 <Pine.LNX.4.58.0411191330210.2222@ppc970.osdl.org> <20041120214915.GA6100@tesore.ph.cox.net>
 <Pine.LNX.4.58.0411211326350.11274@bigblue.dev.mdolabs.com>
 <Pine.LNX.4.58.0411211414460.20993@ppc970.osdl.org>
 <Pine.LNX.4.58.0411211511090.11274@bigblue.dev.mdolabs.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 984
Lines: 26


On Sun, 21 Nov 2004, Davide Libenzi wrote:
> 
> You know you're sick, don't you? Making traps inc's to get you in the 
> correct opcode to move function in edx->fnp, is indeed fruit of a sick 
> mind :=)

I prefer "creative" over "sick". It's so much less judgemental.

I thought it was a fun way to illustrate the issue, and I'm sure somebody 
had fun trying to figure out what the thing did.

I could have _obfuscated_ the thing if I had wanted to make it hard to 
follow, but instead I tried to make it as obvious as possible so that it's 
quite clear from reading the code what it actually does.

But imagine hitting that thing without seeing the source code. NOT a lot 
of fun to debug, even if the debugger _worked_ on it.

		Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/