Le 17/06/2021 à 08:39, Daniel Axtens a écrit :
Allow architectures to define a kasan_arch_is_ready() hook that bails out of any function that's about to touch the shadow unless the arch says that it is ready for the memory to be accessed. This is fairly uninvasive and should have a negligible performance penalty. This will only work in outline mode, so an arch must specify ARCH_DISABLE_KASAN_INLINE if it requires this. Cc: Balbir Singh <bsingharora@xxxxxxxxx> Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Suggested-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx> Signed-off-by: Daniel Axtens <dja@xxxxxxxxxx> -- Both previous RFCs for ppc64 - by 2 different people - have needed this trick! See: - https://lore.kernel.org/patchwork/patch/592820/ # ppc64 hash series - https://patchwork.ozlabs.org/patch/795211/ # ppc radix series I haven't been able to exercise the arch hook error for !GENERIC as I don't have a particularly modern aarch64 toolchain or a lot of experience cross-compiling with clang. But it does fire for GENERIC + INLINE on x86.
Modern toolchains are available here https://mirrors.edge.kernel.org/pub/tools/crosstool/
