DragonFly kernel List (threaded) for 2006-01
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Re: kgdb can't unwind double faults
:hey,
:
:in the process of trying to get my NForce4 GeForce 6150 IGP running=20
:under X (by porting the FreeBSD driver) I noticed that our gdb can't=20
:unwind over double faults. In fact it seems like there is code to=20
:unwind over traps, but it isn't used (due to structural changes in=20
:gdb6).
:
:Am I missing something? Is there a way to see the stack trace=20
:nevertheless? Is there somebody who wants to port FreeBSD's efforts?=20
:(dunno if we want a seperate kgdb binary, but it seems an easy way)
:
:cheers
: simon
I have very little experience with gdb but the basic answer is
*YES*, it is possible. There is some code in there somewhere for
tracking down stack frames and it would not be too difficult
to detect when the stack frame is sitting on the double-fault
stack and to have the backtrace chain back to the kernel stack.
-Matt
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