debugger

Eric W. Biederman ebiederman at lnxi.com
Thu May 15 21:56:01 CEST 2003


ollie lho <ollie at sis.com.tw> writes:

> On Fri, 2003-05-16 at 01:23, jarcher wrote:
> > To add to Ron's message.
> > 
> > It varies a lot with your experience and how dirty you want to get.
> > 
> > A simple POST card and a lot of creative POST code bread crumbs is the 
> > cheap and dirty way to go, until you get the serial port debugger up and 
> > running.  But it requires you to be really creative in crawling through the 
> > code.  And takes a lot of time.
> > 
> > But you can move up the a logic analyzer looking at bus cycles or an ICE 
> > (in circuit emulator) looking at CPU activity  These two are expensive 
> > (lots of $10K), but you can often rent them.  Setup is usually the time 
> > burner here.  But with a LA you can take selective pictures of events 
> > chained together in time.  I don't know if SIS has an ICE for their SOC 
> > products.
> > 
> > Jordan
> > 
> > PS: Has anyone done a USB interface low level debugger?  Early BIOS or at 
> > least just prior to payload decompress.
> > 
> 
> BTW, why didn't we come up with a GDB stub in LinuxBIOS ??

Primarily no one submitted it?.  
Someone reportedly wrote one a while ago.

Admittedly I don't think I would every use it, as I don't see the point.
Except for the resource allocation code practically everything in LinuxBIOS
is pretty trivial straight forward code.  And it should remain so.

Eric




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