Context switch throws out
Leon Pollak
leonp at plris.com
Sun Sep 7 12:06:00 UTC 2003
Hello,
Slowly, slowly, I came to the phase of the first context switch on my mbx860
derived board. It the uses new_exception_processing, as I was able to
determine.
With the bdm interfaced debugger I can follow the execution up to the end of
_CPU_Context_switch function, where everything seems to be OK. Before the
last instruction execution (blr) the link register contains the address of
the _Thread_Handler function. I suppose that this is OK and make one stepi
command.
The result is very strange: the PC jumps somewhere inside
push_normalized_frame routine (?), while the assembler code at the address of
_Thread_Handler looks corrupted.
All my attempts to determine when the _Thread_Handler becomes corrupted shows
that this happens exactly after the blr command execution, which seems to be
noncense...
Any hint about where to look which be VERY highly appreciated...:-))
--
Leon Pollak
leonp at plris dot com
More information about the users
mailing list