arm64: kprobes: WARN if attempting to step with PSTATE.D=1

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Stepping with PSTATE.D=1 is bad news. The step won't generate a debug
exception and we'll likely walk off into random data structures. This
should never happen, but when it does, it's a PITA to debug. Add a
WARN_ON to shout if we realise this is about to take place.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Will Deacon 2016-07-19 15:07:39 +01:00 • committed by Catalin Marinas

parent af78cede8b

commit 44bd887ce1

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arch/arm64/kernel/probes/kprobes.c

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