Messages in this thread | | | Date | Wed, 13 Nov 2013 14:58:07 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH RFC 2/6] arm64: Kprobes with single stepping support |
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On Mon, Nov 11, 2013 at 10:58:12AM +0000, Will Deacon wrote: > Single-stepping on x86 is different to the step behaviour on arm64 afaik. On > ARM, we have to manually remove the breakpoint, perform a single-step, then > add the breakpoint again. If we re-enable debug exceptions in the kprobe > handler, the step will complete early and we'll never step off the > breakpoint.
This is about hardware breakpoints right? Which are per-cpu? Otherwise removing the breakpoint would open up a hole for another thread to slip through while you're single stepping.
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