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Date: Sat, 16 Feb 2008 01:07:22 +0200
To: Andreas Schwab <schwab@suse.de>
Cc: libc-alpha@sourceware.org, libc-alpha@sources.redhat.com,
       linux-kernel@vger.kernel.org
Subject: Re: Linux i386 clone(): %ebx 'frobbing' ?
Message-ID: <20080215230722.GA8012@ubuntu>
References: <20080215184228.GA6687@ubuntu> <jewsp69e5t.fsf@sykes.suse.de>
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From: "Ahmed S. Darwish" <darwish.07@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
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Hi Andreas,

On Fri, Feb 15, 2008, Andreas Schwab wrote:
> "Ahmed S. Darwish" <darwish.07@gmail.com> writes:
> 
> > I don't understand how the `fn' argument reached the child thread
> > in the %ebx register. It's said in the comment that `fn' will be
> > popped to child 'in the ebx frobbing below'. But what does that mean ?
> 
> See "popl %ebx" after "int $0x80".
> 

I hope I'm not misreading something obvious, but I can't find
the code where FUNC(%esp) is stored in %ebx before %ebx value
got pushed in the stack (and restored in above 'popl' statement).

Thanks a lot for help.

-- 
Ahmed S. Darwish
Homepage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com