On Fri, Nov 11, 2022 at 9:26 AM liuhongt <hongtao....@intel.com> wrote: > > 2 years ago, ARM folks support HWASAN[1] in GCC[2], and introduced several > target hooks(Many thanks to their work) so other backends can do similar > things if they have similar feature. > Intel LAM(linear Address Masking)[3 Charpter 14] supports similar feature > with > the upper bits of pointers can be used as metadata, LAM support two modes: > LAM_U48:bits 48-62 can be used as metadata > LAM_U57:bits 57-62 can be used as metedata. > > These 2 patches mainly support those target hooks, but HWASAN is not really > enabled until the final decision for the LAM kernel interface which may take > quite a long time. We have verified our patches with a "fake" interface > locally[4], and > decided to push the backend patches to the GCC13 to make other HWASAN > developper's work > easy. > > [1] https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html > [2] https://gcc.gnu.org/pipermail/gcc-patches/2020-November/557857.html > [3] > https://www.intel.com/content/dam/develop/external/us/en/documents/architecture-instruction-set-extensions-programming-reference.pdf > [4] https://gitlab.com/x86-gcc/gcc/-/tree/users/intel/lam/master > > > Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. > Ok for trunk? I'll install 2 patches if there's no objections in next 7 days. > > liuhongt (2): > Implement hwasan target_hook. > Enable hwasan for x86-64. > > gcc/config/i386/i386-expand.cc | 12 ++++ > gcc/config/i386/i386-options.cc | 3 + > gcc/config/i386/i386-opts.h | 6 ++ > gcc/config/i386/i386-protos.h | 2 + > gcc/config/i386/i386.cc | 123 ++++++++++++++++++++++++++++++++ > gcc/config/i386/i386.opt | 16 +++++ > libsanitizer/configure.tgt | 1 + > 7 files changed, 163 insertions(+) > > -- > 2.18.1 >
-- BR, Hongtao
