From: Rob Landley <rob@landley.net>
To: joakim.tjernlund@transmode.se
Cc: uclibc@uclibc.org, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: Powerpc crt1.S change faulty
Date: Thu, 29 Mar 2007 12:53:16 -0400 [thread overview]
Message-ID: <200703291253.17092.rob@landley.net> (raw)
In-Reply-To: <1175155534.1597.13.camel@gentoo-jocke.transmode.se>
On Thursday 29 March 2007 4:05 am, Joakim Tjernlund wrote:
> Hi Rob
>
> I saw your change to powerpc crt1.S and I don't agree with it.
> mr r8,r3 copies r3 to r8
> r8 needs to maps to rtld_fini in __uClibc_main and that maps to
> _dl_fini. Basically you have broken dynamic apps.
Sigh. Ok.
What does the comment mean, then?
> For static apps NULL must be passed in r8 and currenly
> crt1.S relies on the kernel to zero r3(since r3 holds
> the return value of exec) before handing over user space.
> If this no longer is true we are in deep sh***
>
> Can you check if r3 is zero in your kernel? what kernel version
> are you using? Are you using QEMU?
Yup. I'm using qemu-ppc, and without this change a statically linked "hello
world" segfaults on exit (but not on _exit()). Lemme forward this message to
the qemu list.
For reference, the change is:
http://uclibc.org/cgi-bin/viewcvs.cgi?rev=18270&view=rev
> Jocke
Rob
--
Vista: Windows Millenium Second Edition
next parent reply other threads:[~2007-03-29 16:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1175155534.1597.13.camel@gentoo-jocke.transmode.se>
2007-03-29 16:53 ` Rob Landley [this message]
2007-03-29 17:14 ` [Qemu-devel] RE: Powerpc crt1.S change faulty Joakim Tjernlund
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