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Re: GNU Mach: disabling all network device drivers

From: Samuel Thibault
Subject: Re: GNU Mach: disabling all network device drivers
Date: Wed, 9 Jun 2010 08:24:55 +0200
User-agent: Mutt/1.5.12-2006-07-14

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.


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