Artyom Tarasenko wrote:
Does this sound reasonable? I'm surprised that one else has realised that the obp_fortheval_v2 function signature was wrong, but I guess it probably hardly gets used for anything these days.
Ops. Forgot to submit this patch back then. :(. Sorry. The reason was not getting too far with the patch, because of the broken memory management.
Okay; I've committed something which should do the trick to SVN as r915.
Hmmmm these symptoms look exactly like something on SPARC64 where various bits of memory were getting clobbered because of a lack of stack space... (goes and has a look)...
Right - it's definitely something related to the stack when calling from the client into OpenBIOS (or vice-versa). If you take a look at arch/sparc32/context.c and start increasing IMAGE_STACK_SIZE, say to 16K or 32K you'll see that things suddenly start to work much better.
I think its related to the flushing of register windows onto the stack when switching between the two. My thoughts are that this is probably related to Igor's SPARC64 patches here:
http://www.openfirmware.info/pipermail/openbios/2009-July/003762.html
I suspect that you'll need to come up with something along similar lines for SPARC32. Blue, any thoughts?
ATB,
Mark.