On Fri, Mar 5, 2021 at 3:51 PM Nick Desaulniers <ndesaulni...@google.com> wrote: > > (in response to > https://lore.kernel.org/linux-arm-kernel/20210303170932.1838634-1-jthie...@redhat.com/ > from the command line) > > > Changes since v1[2]: > > - Drop gcc plugin in favor of -fno-jump-tables > > Thank you for this! I built+booted(under emulation) arm64 defconfig and built > arm64 allmodconfig with LLVM=1 with this series applied. > > Tested-by: Nick Desaulniers <ndesaulni...@google.com> > > One thing I noticed was a spew of warnings for allmodconfig, like: > init/main.o: warning: objtool: asan.module_ctor()+0xc: call without frame > pointer save/setup > init/main.o: warning: objtool: asan.module_dtor()+0xc: call without frame > pointer save/setup > > I assume those are from the KASAN constructors. See also: > https://github.com/ClangBuiltLinux/linux/issues/1238 > > Can we disable HAVE_STACK_PROTECTOR if CC_IS_CLANG and CONFIG_KASAN is set, > until we can resolve the above issue?
Ah, filtering the logs more, it looks like GCOV is has the same issue KASAN does (known issue). Here's a filtered log: https://gist.github.com/nickdesaulniers/01358015b33bd16ccd7d951c4a8c44e7 I'm curious about the failure to decode certain instructions? The stack state mismatches are what are valuable to me; we'll need some help digging into those at some point. The logs from defconfig are clean. -- Thanks, ~Nick Desaulniers