[OpenBIOS] PATCH: Implement Forth source debugger for OpenBIOS

Mark Cave-Ayland mark.cave-ayland at siriusit.co.uk
Wed Nov 4 16:08:43 CET 2009

Laurent Vivier wrote:

(lots cut)

> 4- forth/admin/iocontrol.fs:install-console
>     ...
>     ['] io-emit to emit
>     ...
> where io-emit is:
> : io-emit ( char -- )
>   io-out-char c!
>   io-out-char 1 " write" stdout @ $call-method drop
> ;
> And stdout is defined in arch/ppc/qemu/init.c:arch_of_init() (see 2- )

Thank you - now I see that the defer word "emit" is not set to execute 
the C function emit, which is what was confusing me.

Here's a proof-of-concept v3 patch which bounces off the forth 
trampoline in order to perform console output which seems to work for me 
on SPARC64 with VNC - please can you check it works for you?

Note this patch isn't ready to be applied yet, since I haven't had 
enough time to implement a patch to ensure that there is no speed 
penalty when debug mode is disabled.

Many thanks,


Mark Cave-Ayland - Senior Technical Architect
PostgreSQL - PostGIS
Sirius Corporation plc - control through freedom
t: +44 870 608 0063

Sirius Labs: http://www.siriusit.co.uk/labs
-------------- next part --------------
A non-text attachment was scrubbed...
Name: openbios-add-debug-v3.patch
Type: text/x-diff
Size: 18838 bytes
Desc: not available
URL: <http://lists.openbios.org/pipermail/openbios/attachments/20091104/c8161d6e/attachment.bin>

More information about the OpenBIOS mailing list