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[Qemu-devel] Re: Fun with sparc (was Re: qemu-ppc can't run static uClib

From: Rob Landley
Subject: [Qemu-devel] Re: Fun with sparc (was Re: qemu-ppc can't run static uClibc binaries.)
Date: Sat, 20 Feb 2010 12:38:17 -0600
User-agent: KMail/1.11.2 (Linux/2.6.28-17-generic; KDE/4.2.2; x86_64; ; )

On Saturday 20 February 2010 11:34:44 Blue Swirl wrote:
> On 2/20/10, Rob Landley <address@hidden> wrote:
> >  I don't understand what's going wrong here.  Did the kernel break on
> > sparc sometime between 2.6.18 and 2.6.32 and nobody noticed?  Is sparc
> > using software emulated floating point at the kernel level and that's
> > configured as a module?  (Except I don't think busybox ls uses floating
> > point...)
> Sparc32 is not maintained anymore so maybe it broke at some point.
> There was some discussion a few years ago.

Not maintained on the Linux kernel side, or not maintained under qemu?  It 
seems to be working under debian, but the 2.6.18 kernel is from 2006.

> >  Do any sparc people understand what's going on here?  My next step is to
> > grab a 2.6.18 kernel and try to get _that_ to work with the tweaked
> > debian config (and an ext2 root filesystem since squashfs wasn't merged
> > back then and had a format change when it was merged).  But I'm mostly
> > flailing around blind here...
> I'm also trying different kernels using my .config. But already 2.6.12
> hangs in ESP probe.

I've got 2.6.32 booting to a command prompt (albeit with serial console and 
intentionall restricted set of hardware).  But then it misbehaves.

I'll try getting 2.6.18 to build with a known .config, and then bisect forward 
if that seems to work...


Latency is more important than throughput. It's that simple. - Linus Torvalds

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