On 08/12/2016 07:50 AM, Holger Brunck wrote: > When I try to debug our multithreaded userspace application with gdb I get > stuck when trying to single step code.
Can you clarify "stuck"? Like the instructions don't advance? Have you been able to find a root cause for this? > Does anyone have an idea why the change in sched.h break my debug > usecase? Anyone out here who is debugging ppc83xx targets flawlessly > with a recent kernel? Thanks for going to the trouble of bisecting this, btw! I'd _suspect_ something very specific to your platform since this doesn't appear to affect even other ppc variants. I wonder if making it cross a page boundary from some other structure causes this, or moving it relative to something else. Could you try moving it to a few more places, or padding it by, say PAGE_SIZE on either side makes a difference? Is there some assembly involved in your single-stepping, or some other code that assumes relative offsets between two pieces of 'task_struct'?
