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Date: Sat, 16 Feb 2008 01:54:05 +0200 From: "Ahmed S. Darwish" <darwish.07@...il.com> To: Andreas Schwab <schwab@...e.de> Cc: libc-alpha@...rceware.org, libc-alpha@...rces.redhat.com, linux-kernel@...r.kernel.org Subject: Re: Linux i386 clone(): %ebx 'frobbing' ? On Sat, Feb 16, 2008 at 12:28:11AM +0100, Andreas Schwab wrote: > "Ahmed S. Darwish" <darwish.07@...il.com> writes: > > > Hi Andreas, > > > > On Fri, Feb 15, 2008, Andreas Schwab wrote: > >> "Ahmed S. Darwish" <darwish.07@...il.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). > > It is stored in the new stack for the child, as explained in the > comment. The parent has a different stack. > Ooh great, I got it. Sorry, my mind didn't connect the dots though I read the comment several times. Thanks a lot for bearing with me :). Regards, -- Ahmed S. Darwish Homepage: http://darwish.07.googlepages.com Blog: http://darwish-07.blogspot.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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