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arm64: kprobes: WARN if attempting to step with PSTATE.D=1
authorWill Deacon <will.deacon@arm.com>
Tue, 19 Jul 2016 14:07:39 +0000 (15:07 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Tue, 19 Jul 2016 16:00:29 +0000 (17:00 +0100)
commit44bd887ce10eb8061f6a137f8a73f823957edd82
tree01c45387b5a4e9b7ec7a0328299d569fe8e05da5tree | snapshot (tar.gz zip)
parentaf78cede8bfc772baf424fc03f7cd3c8f9437733commit | diff
arm64: kprobes: WARN if attempting to step with PSTATE.D=1

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>
arch/arm64/kernel/probes/kprobes.c diff | blob | blame | history