On Fri, Jun 23, 2023 at 12:11:41AM +0000, Sami Tolvanen wrote: > Hi folks, > > The following two patches fix CFI failures with GCOV_PROFILE_ALL, > where the compiler injects indirectly called functions to object > files that otherwise contain no executable code, and are not > processed by objtool or don't have CFI enabled. This results in > missing or incorrect type hashes during boot and when modules are > loaded. > > Sami Tolvanen (2): > kbuild: Fix CFI failures with GCOV > kbuild: Disable GCOV for *.mod.o > > init/Makefile | 1 + > scripts/Makefile.modfinal | 2 +- > scripts/Makefile.vmlinux | 1 + > 3 files changed, 3 insertions(+), 1 deletion(-) > Urgh, tricky stuff this. Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> And yes, objtool essentially assumes vmlinux.o is complete and does LTO like passes. Is there something kbuild can do to ensure noting else gets linked in after this?
