Messages in this thread | | | Subject | Re: [RFC][PATCH 07/11] perf: Provide PERF_SAMPLE_REGS | From | Peter Zijlstra <> | Date | Thu, 04 Mar 2010 09:58:07 +0100 |
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On Wed, 2010-03-03 at 23:02 +0100, Frederic Weisbecker wrote: > On Wed, Mar 03, 2010 at 05:39:43PM +0100, Peter Zijlstra wrote: > > Simply copy out the provided pt_regs in a u64 aligned fashion. > > > > XXX: do task_pt_regs() and get_irq_regs() always clear everything or > > are we now leaking data? > > > It looks like there is a leak in case of non trace syscalls. > where we don't appear to save r12-15. > > Then task_pt_regs() may leak the top of a process stack...?
Right, I was afraid of that. I've put this PERF_SAMPLE_REGS thing in the freezer for now as people seem unsure how to deal with it.
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