From nobody Thu Dec 18 10:00:33 2025 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 482371FCFDF for ; Tue, 11 Feb 2025 11:50:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739274630; cv=none; b=Gkhw4HouFGmRdqiGopqlgLNNIskcHWZOTBa4PMJrUUx2EB84vlji7x/ElrMXMZnzGhjfe7qlMPKMSiFK5o4b/r5CiKO58k3aC6COqLzuoX3RftlqXgoMxqWR0V+SHDoAXAyVbJxnUvzKJpfIB5mIJTkkP1mKjVg9qXJMLWJBcIc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739274630; c=relaxed/simple; bh=OQes0auVUwdkFYJo/DfYq5t8km5FIuIzxzDJraV02JM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LaHsml4zUnp2LqhQmN+0W7LZk1gCMGreDTNdB4t2pN0W8EBA6mJmHRs7yiCHig74TIeLePTusxMN5HFgYDYegom5QdM8uAw/t9Arpwr8WTdt3kdalMAtwx6fSdBGg/kUWUa1hceeKkaQDctjWyEaeTAcXZk0Wuyrejq7oa/vy1g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [113.200.148.30]) by gateway (Coremail) with SMTP id _____8AxDGuBOatnaCJyAA--.2098S3; Tue, 11 Feb 2025 19:50:25 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowMBx3MR6OatnNPMLAA--.43600S8; Tue, 11 Feb 2025 19:50:25 +0800 (CST) From: Tiezhu Yang To: Josh Poimboeuf , Peter Zijlstra , Huacai Chen Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v7 6/7] LoongArch: Enable jump table for objtool Date: Tue, 11 Feb 2025 19:50:15 +0800 Message-ID: <20250211115016.26913-7-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20250211115016.26913-1-yangtiezhu@loongson.cn> References: <20250211115016.26913-1-yangtiezhu@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMBx3MR6OatnNPMLAA--.43600S8 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj93XoW7uFWDWF4fuF1fAr1fAryfZrc_yoW8WrW3pw s7Zr4vgr4kWFn5trZrJ3yFgr98JrnrKr43XF42ka48AFW7Z3yUZr48ta9rXF1UAwsxJrWI qFWfKasIvFWUJ3XCm3ZEXasCq-sJn29KB7ZKAUJUUUUr529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUvEb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r106r15M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ GcCE3s1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2 x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1q6rW5 McIj6I8E87Iv67AKxVW8JVWxJwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr4 1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxYO2xFxVAFwI0_Jrv_ JF1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17 CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Xr0_Ar1lIxAIcVC0 I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I 8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73 UjIFyTuYvjxU4miiDUUUU Content-Type: text/plain; charset="utf-8" For now, it is time to remove -fno-jump-tables to enable jump table for objtool if the compiler has -mannotate-tablejump, otherwise it is better to remain -fno-jump-tables to keep compatibility with older compilers. Signed-off-by: Tiezhu Yang --- arch/loongarch/Kconfig | 3 +++ arch/loongarch/Makefile | 6 +++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 2b8bd27a852f..15aaa2e6757e 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -291,6 +291,9 @@ config AS_HAS_LBT_EXTENSION config AS_HAS_LVZ_EXTENSION def_bool $(as-instr,hvcl 0) =20 +config CC_HAS_ANNOTATE_TABLEJUMP + def_bool $(cc-option,-mannotate-tablejump) + menu "Kernel type and options" =20 source "kernel/Kconfig.hz" diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index 567bd122a9ee..0304eabbe606 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -101,7 +101,11 @@ KBUILD_AFLAGS +=3D $(call cc-option,-mthin-add-sub) = $(call cc-option,-Wa$(comma) KBUILD_CFLAGS +=3D $(call cc-option,-mthin-add-sub) $(call cc-option,-Wa= $(comma)-mthin-add-sub) =20 ifdef CONFIG_OBJTOOL -KBUILD_CFLAGS +=3D -fno-jump-tables +ifdef CONFIG_CC_HAS_ANNOTATE_TABLEJUMP +KBUILD_CFLAGS +=3D -mannotate-tablejump +else +KBUILD_CFLAGS +=3D -fno-jump-tables # keep compatibility with older comp= ilers +endif endif =20 KBUILD_RUSTFLAGS +=3D --target=3Dloongarch64-unknown-none-softfloat -Ccod= e-model=3Dsmall --=20 2.42.0