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From: Rafael =?iso-8859-1?q?=C1vila_de_Esp=EDndola?=
	<rafael.espindola@ic.unicamp.br>
Subject: Re: [Qemu-devel] USE_CODE_COPY breaks clone
Date: Wed, 1 Sep 2004 20:17:21 -0300
References: <200409011432.40742.rafael.espindola@ic.unicamp.br>
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To: qemu-devel@nongnu.org

On Wednesday 01 September 2004 14:32, Rafael =C1vila de Esp=EDndola wrote:
> I think that the problem is in the fact that cpu_init is called in the
> parent process and this functions calls modify_ldt.
>
> Where can I found some documentation about modify_ldt? What is
> USE_CODE_COPY supposed to do?
Ok. It translate i386 to i386 code by copying it.

> I will try to call cpu_init from within the new thread and see if it work=
s.
No it doesn't. If clone is called with CLONE_VM then the kernel does =20
mm =3D oldmm;
and both processes share the ldt. So the parent ldt is "also" changed when=
=20
cpu_init is called from clone_func.

I could not find out why it is necessary to modify the ltd of the process f=
or=20
code copy to work. Is there some documentation? Could someone explain?

Does someone have an Idea of how to solve this?

Thanks,
Rafael