On 10-6-9 下午2:24, Samuel Thibault wrote: > Zheng Da, le Wed 09 Jun 2010 01:22:48 -0400, a écrit : >> So which instruction triggers the trap? nop or movl? > > movl, but it's not its ofwn fault. > > My guess is that right after sti, an interrupt is triggered while nop is > being executed, gets handled after nop is executed, and we return to > movl, but somehow the return doesn't reactivate the kernel pagetable or > privilege. Looking at the registers you have again, I see > > cs 0x8 > ds 0x10 > > These are correct. So that must the the pagetable that is incorrect. > Check out cr3 and such. How do I check cr3? show registers doesn't give cr3.
Zheng Da
