Re: Booting Hurd-L4 under qemu

[Rian Hunter]

Sam Mason wrote:

> Marcus Brinkmann wrote:
>  
>
> > I use qemu.
> >    
>
> Just tried qemu but haven't had as much luck as with bochs.  I've
> tried both the latest relased and CVS versions of qemu with the disk
> image I was using with bochs to no avail.  P2-mate (on IRC)
> reccommended trying compiling Pistachio for an i586 processor.  It
> does a little better now and Pistachio boots, but Sigma0 dies with
> "s0: no page-size mask" - I'm guessing this comes from Sigma0 as the
> binary contains that string!  The IP also verifies this; eip=00041344
> when it dies and I get this boot message:
>
>  Sigma0: Low 0x40000, High 0x483a0, IP 0x41950, SP 0x0
>
> Any ideas on what I've got wrong?
>  
Hmm, well first the stack pointer is (SP) is 0x0, and that isn't exactly 
right. Also that error comes only if the PageSizeMask field of the KIP 
is empty and it really really shouldn't be. How are you booting? Try a 
standard L4 boot just to see if your kernel and userland apps were 
compiled correctly, in grub:

--
kernel /path/kickstart
module /path/ia32-kernel
module /path/sigma0
module /path/grabmem
boot

----

What I would do is set the debug flag in the sigma0 source: (Line 49 in 
sigma0.cc, set verbose to > 0), make a clean build, then seeing what 
sigma0 says about its KIP when it is booting before it gets to 
init_mempool(). If that gives you no luck, also check the code the is 
filing the KIP in the kernel. If all else fails, get version 0.4 of 
Pistachio, do a clean build for the Pentium (not 2/3/4) processor and 
try that. Good luck!
-rian