Re: [PATCH 08/12] add trace events for each syscall entry/exit

From: H. Peter Anvin
Date: Wed Aug 26 2009 - 13:30:07 EST

On 08/26/2009 12:10 AM, Peter Zijlstra wrote:
> On Tue, 2009-08-25 at 14:31 -0400, Mathieu Desnoyers wrote:
>> For instance, some
>> proprietary Linux driver does very odd things with system calls within
>> kernel threads, like invoking them with int 0x80.
> So who is going to send the x86 patch to make int 0x80 from kernel space
> panic the machine? :-)

Panicing might be a pretty darn good idea, since $DEITY knows what state
your stacks are in at that point, and if it is about to overflow.

... besides all the other evilness that entails.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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