From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from conuserg-08.nifty.com (conuserg-08.nifty.com [210.131.2.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5970E1851 for ; Fri, 27 May 2022 10:04:48 +0000 (UTC) Received: from grover.sesame (133-32-177-133.west.xps.vectant.ne.jp [133.32.177.133]) (authenticated) by conuserg-08.nifty.com with ESMTP id 24RA2hPY029808; Fri, 27 May 2022 19:02:52 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-08.nifty.com 24RA2hPY029808 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1653645773; bh=jCYP4PRhKOSnrfF8IZ7vFN4wM6bjQvDGDEXIDORQ8GA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jikzAhA331ol0PYeJLvjeBEbXdujI+kIf0o3ofXuKIEM+meJCBxUL0pXT+5ICkrrk WGEI+qfbQ/eYfPv2X/mCpePNalEwvJoQquANrW6/9yUIYvayiJG3pecAlquCklvEzu u9CAnTa2xAQfvS1milmRCkFvz1Ows9DtGa22empJVZwYjcSYwicxgZfullj8vV0NpX hX66B4UH9sI7lX+LKJvr0edE2Gsv1wZM/9PTdvP6Iw+GTJyitv6VLegEP4RdZeO1DD 0UWOpTu5TFRnHiim7arEAU9NCmnt1bLfqR+NSrzOK26eqN0h/T4CftjLGI9wKkrUH9 bW4oOJqflZ3eQ== X-Nifty-SrcIP: [133.32.177.133] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Josh Poimboeuf , llvm@lists.linux.dev, Helge Deller , linux-parisc@vger.kernel.org, Masahiro Yamada , Kees Cook , Nathan Chancellor , Nicolas Schier , Sedat Dilek , Michal Marek , Nick Desaulniers , Tom Rix Subject: [PATCH v7 8/8] kbuild: rebuild multi-object modules when objtool is updated Date: Fri, 27 May 2022 19:01:55 +0900 Message-Id: <20220527100155.1996314-9-masahiroy@kernel.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220527100155.1996314-1-masahiroy@kernel.org> References: <20220527100155.1996314-1-masahiroy@kernel.org> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When CONFIG_LTO_CLANG or CONFIG_X86_KERNEL_IBT is enabled, objtool for multi-object modules is postponed until the objects are linked together. Make sure to re-run objtool and re-link multi-object modules when objtool is updated. Signed-off-by: Masahiro Yamada Reviewed-by: Kees Cook Acked-by: Josh Poimboeuf Tested-by: Nathan Chancellor Reviewed-by: Nicolas Schier Tested-by: Sedat Dilek # LLVM-14 (x86-64) --- (no changes since v4) Changes in v4: - New Resent of my previous submission https://lore.kernel.org/linux-kbuild/20210831074004.3195284-11-masahiroy@kernel.org/ scripts/Makefile.build | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 31feb798e16e..bd5fc2b37387 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -412,13 +412,18 @@ $(obj)/modules.order: $(obj-m) FORCE $(obj)/lib.a: $(lib-y) FORCE $(call if_changed,ar) -quiet_cmd_link_multi-m = LD [M] $@ - cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool) +quiet_cmd_ld_multi_m = LD [M] $@ + cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool) + +define rule_ld_multi_m + $(call cmd_and_savecmd,ld_multi_m) + $(call cmd,gen_objtooldep) +endef $(multi-obj-m): objtool-enabled := $(delay-objtool) $(multi-obj-m): part-of-module := y $(multi-obj-m): %.o: %.mod FORCE - $(call if_changed,link_multi-m) + $(call if_changed_rule,ld_multi_m) $(call multi_depend, $(multi-obj-m), .o, -objs -y -m) targets := $(filter-out $(PHONY), $(targets)) -- 2.32.0