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Message-ID: <jeir0pajg4.fsf@sykes.suse.de> Date: Sat, 16 Feb 2008 00:28:11 +0100 From: Andreas Schwab <schwab@...e.de> To: "Ahmed S. Darwish" <darwish.07@...il.com> Cc: libc-alpha@...rceware.org, libc-alpha@...rces.redhat.com, linux-kernel@...r.kernel.org Subject: Re: Linux i386 clone(): %ebx 'frobbing' ? "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. Andreas. -- Andreas Schwab, SuSE Labs, schwab@...e.de SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." -- 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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