Re: [PATCH 07/12] perf_events: add LBR software filter support forIntel X86
From: Peter Zijlstra
Date: Fri Oct 07 2011 - 12:06:01 EST
On Fri, 2011-10-07 at 17:09 +0200, Andi Kleen wrote:
> > if (kernel_ip(addr) || !test_tsk_thread_flag(current, TIF_IA32))
> That's not good, a 64bit process can do 32bit syscalls.
> The only fully working way is to check the code segment, unfortunately
> that requires checking the LDT to be fully correct :-(
I can't really be arsed about people doing daft shit like that. The
worst that happens is that their PEBS fixup fails. Honestly if you do
crazy things like that you deserve far far worse.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/