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Re: [Qemu-devel] ARM

From: Daniel Jacobowitz
Subject: Re: [Qemu-devel] ARM
Date: Thu, 10 Jul 2003 12:17:18 -0400
User-agent: Mutt/1.5.1i

On Wed, Jul 09, 2003 at 09:49:33PM +0200, Fabrice Bellard wrote:
> Daniel Jacobowitz wrote:
> >I was just playing with the ARM support, it's great to see it taking
> >shape :)  Fabrice, are you still investigating it, or does it work for
> >you?  My local ARM setup crashes a few hundred instructions into ld.so;
> >a loop runs for too long and hits the top of the stack.
> >
> With my latest commits it is working: QEMU can launch dynamically linked 
> 'ls' and 'bash' processes. I will provide soon a binary archive so that 
> people can at least try it if they have problems.

Still doesn't work here.  I've attached the debugging output if you're
curious; I won't have time to debug it properly until next week.  It
looks like something wrong with the conditional jump.

> Warning: no FPU emulation is done. I just added the necessary code to 
> skip the few FPU instructions present in the libc. If anyone has ideas 
> about FPU on ARM, I am interested. Unfortunately the Linux distributions 
> seem to use the kernel based NetWinder FPU emulator.

Yes; here we use userspace software floating point generally instead. 
Hardware which actually has the FPA unit is rare (is there any

> I tested the ARM support with an ARM glibc-2.2.5 from a debian 3.0 
> installed on a StrongARM board.

My failing test is from a later version of glibc and GCC.

Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

Attachment: qemu.log
Description: Text document

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