From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6B74E292B5D; Thu, 26 Jun 2025 23:56:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750982212; cv=none; b=KJIZse+WyLJcL6J5JFxSmosE1VEiQy/wx5MiTgNze8I9bhh/9m28DtYhr9661H9loeXt6oY9nJCBMnlh3kQq3yO8+9qMihLBo+73oti4sxXwTLkwkPn4nfnq91ZkcHoty5w4gKEoeqiEnL0EwkGxT3F3cHLmZGHNfqxsvCG4H7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750982212; c=relaxed/simple; bh=C3hl/octZq4mZ1MaR7e5EA/59I5YP/4wR5GptOcc2VY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=s1zCdIKxtfvhOZumZQt5ZE0SrpAXmRpV3M8dRFIEQk5+8J2mJ+3mfG7S01/jtEJHNmDpsBRLbfIGWmYq2MERYI72cCVy4yzfLetLWq86JsVrgOS4Has8Zaw7pXcnIqcH2qgtTBFM8hPUQ68ZQfyUPDoNjwakf2GmHrdWlMhhTjg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=h/t7eQ+2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="h/t7eQ+2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1A62C4CEF2; Thu, 26 Jun 2025 23:56:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750982212; bh=C3hl/octZq4mZ1MaR7e5EA/59I5YP/4wR5GptOcc2VY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h/t7eQ+2Z8qeo7bVcAzOCHHXYZK1yKXsiLvUHHLOGDeqwFu90QclsRX6a8yucVSlt VNpLhWSRgsRIQLbW0G0dc+OPvsg5xeWH/3yspo5smZUTHNRSJ/WNPRrePburBKYspN kfAtOWA7DcOl42X+rmDp8vU6yaKhk/dKpCkUFF8Mz46FEt8SfTuleY44C0yyOwgrrK 4oYinsGT4WL6OGgQQy58w12xs/h+zVLFkoR05IRRj02JpzRxxJ2bV+jNY0hrjOoJ4e x6bx3P3EMOjnm7x9seyB1/CPbpTFfaIhhQkj2VOcIbfAo+Hwtgzu9mZ3qx9rjOOPDI PF9v9TJm80O9A== From: Josh Poimboeuf To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Petr Mladek , Miroslav Benes , Joe Lawrence , live-patching@vger.kernel.org, Song Liu , laokz , Jiri Kosina , Marcos Paulo de Souza , Weinan Liu , Fazla Mehrab , Chen Zhongjin , Puranjay Mohan , Dylan Hatch Subject: [PATCH v3 58/64] kbuild,objtool: Defer objtool validation step for CONFIG_KLP_BUILD Date: Thu, 26 Jun 2025 16:55:45 -0700 Message-ID: X-Mailer: git-send-email 2.49.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In preparation for klp-build, defer objtool validation for CONFIG_KLP_BUILD kernels until the final pre-link archive (e.g., vmlinux.o, module-foo.o) is built. This will simplify the process of generating livepatch modules. Delayed objtool is generally preferred anyway, and is already standard for IBT and LTO. Eventually the per-translation-unit mode will be phased out. Signed-off-by: Josh Poimboeuf --- scripts/Makefile.lib | 2 +- scripts/link-vmlinux.sh | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 15fee73e9289..28a1c08e3b22 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -197,7 +197,7 @@ objtool-args = $(objtool-args-y) \ $(if $(delay-objtool), --link) \ $(if $(part-of-module), --module) -delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT)) +delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT),$(CONFIG_KLP_BUILD)) cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool-args) $@) cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd) diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index 51367c2bfc21..59f875236292 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -60,7 +60,8 @@ vmlinux_link() # skip output file argument shift - if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT; then + if is_enabled CONFIG_LTO_CLANG || is_enabled CONFIG_X86_KERNEL_IBT || + is_enabled CONFIG_KLP_BUILD; then # Use vmlinux.o instead of performing the slow LTO link again. objs=vmlinux.o libs= -- 2.49.0