> So this is a check that checks if you're running in user mode if > you have a debug trap with single step, but somehow it triggered > for a user segment. > > Probably the regs got corrupted. > > Sasha, I suspect you're missing a mov %rsp,%rdi somewhere in the > debug entry path that sets up the regs argument for the C code.
... Ah never mind. Thomas has a better explanation. -Andi
