On Mon, Sep 02, 2024 at 09:00:12PM -0700, Josh Poimboeuf wrote: > Calculate per-function checksums based on the functions' content and > relocations. This will enable objtool to do binary diffs. > > Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> > --- > scripts/Makefile.lib | 1 + > tools/objtool/Makefile | 7 +- > tools/objtool/builtin-check.c | 1 + > tools/objtool/check.c | 137 +++++++++++++++++++++++- > tools/objtool/elf.c | 31 ++++++ > tools/objtool/include/objtool/builtin.h | 3 +- > tools/objtool/include/objtool/check.h | 5 +- > tools/objtool/include/objtool/elf.h | 11 +- > tools/objtool/include/objtool/objtool.h | 2 + > 9 files changed, 188 insertions(+), 10 deletions(-) > > diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib > index 8411e3d53938..9f4708702ef7 100644 > --- a/scripts/Makefile.lib > +++ b/scripts/Makefile.lib > @@ -265,6 +265,7 @@ ifdef CONFIG_OBJTOOL > > objtool := $(objtree)/tools/objtool/objtool > > +objtool-args-$(CONFIG_LIVEPATCH) += --sym-checksum > objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label > objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr > objtool-args-$(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) += --hacks=skylake > diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile > index bf7f7f84ac62..6833804ca419 100644 > --- a/tools/objtool/Makefile > +++ b/tools/objtool/Makefile > @@ -21,6 +21,9 @@ OBJTOOL_IN := $(OBJTOOL)-in.o > LIBELF_FLAGS := $(shell $(HOSTPKG_CONFIG) libelf --cflags 2>/dev/null) > LIBELF_LIBS := $(shell $(HOSTPKG_CONFIG) libelf --libs 2>/dev/null || echo -lelf) > > +LIBXXHASH_FLAGS := $(shell $(HOSTPKG_CONFIG) libxxhash --cflags 2>/dev/null) > +LIBXXHASH_LIBS := $(shell $(HOSTPKG_CONFIG) libxxhash --libs 2>/dev/null || echo -lxxhash) This was not installed on my system and I got a nasty build fail. Should we make all this depend on CONFIG_LIVEPATCH or force world+dog to install this as yet another kernel build dependency?
