From: Jun Sun <jsun@mvista.com>
To: Harald Koerfgen <Harald.Koerfgen@home.ivm.de>
Cc: linux-mips@oss.sgi.com, "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>,
Ralf Baechle <ralf@oss.sgi.com>
Subject: Re: Build failure for R3000 DECstation
Date: Wed, 15 Nov 2000 12:17:54 -0800 [thread overview]
Message-ID: <3A12EF72.980C8E92@mvista.com> (raw)
In-Reply-To: XFMail.001115204613.Harald.Koerfgen@home.ivm.de
Harald Koerfgen wrote:
> > I also doubt if k0 is absolutely non-zero after a context ...
>
> That's not the problem here, yes, it is. At least for the the CONFIG_CPU_R3000
> case. Have a look at include/asm-mips/stackframe.h, especially the R3000
> version of the RESTORE_SP_AND_RET macro.
>
I did not doubt the non-zero value of k0. I really doubted the
approach: a userland primitive is based on non-documented,
non-guarranteed kernel stack restoring code. Once something changes in
kernel, you will get really obscure bugs.
Jun
next prev parent reply other threads:[~2000-11-15 20:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-12 20:00 Build failure for R3000 DECstation Jan-Benedict Glaw
2000-11-13 9:47 ` Ralf Baechle
2000-11-14 21:30 ` Harald Koerfgen
2000-11-14 23:41 ` Ralf Baechle
2000-11-15 0:58 ` Maciej W. Rozycki
2000-11-15 1:43 ` Ralf Baechle
2000-11-15 3:13 ` Jun Sun
2000-11-15 3:16 ` Ralf Baechle
2000-11-15 11:21 ` Maciej W. Rozycki
2000-11-15 19:46 ` Harald Koerfgen
2000-11-15 20:17 ` Maciej W. Rozycki
2000-11-15 20:21 ` Jun Sun
2000-11-16 13:23 ` Maciej W. Rozycki
2000-11-15 20:17 ` Jun Sun [this message]
2000-11-15 20:31 ` Maciej W. Rozycki
2000-11-15 11:18 ` Maciej W. Rozycki
2000-11-16 1:27 ` Ralf Baechle
2000-11-16 13:41 ` Maciej W. Rozycki
2000-11-15 19:46 ` Harald Koerfgen
2000-11-13 21:03 ` Harald Koerfgen
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