From nobody Sat Nov 23 17:44:21 2024 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6F3AA1991B4 for ; Tue, 19 Nov 2024 06:57:05 +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=1731999427; cv=none; b=C8eXV4lQaqAcFIbPdDBTdS7X/hJ6SsSHDAE/sHOfXEf+q23F2BdR1KA7JD/W5mNaJ59X0aZi715i4LXtoC4pTfzEbY0ArKhdqPtdnrUi26BkgQGXAImTurkKf5R9EzaZJhLTbF5CAyRSVhHscoi77oO84XZPUfkfp/pKcxKSsD0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731999427; c=relaxed/simple; bh=ABz/vWnPLoWfMePrVIQsijD1UvXElWP1z/6f+ice6nw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LIo5I3yq8vgWsvdp5QhDwSslb3OdUCUUpUmKJHREYarYquMlvWjSkV24t+oBT2uSsFK2dINmhCvAzQeWjx9QyGK6GMnCQW7wWyMZ985ATm9d/Lw8v/LvueUoYjOLfuT4Zo7W+83sLbe+cTmXM4Em4AI/WLTnbG+xIDw9Ab5zs8I= 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 _____8DxDeO+NjxnZTZCAA--.63607S3; Tue, 19 Nov 2024 14:57:02 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowMCxDuG4NjxnB_5cAA--.5437S6; Tue, 19 Nov 2024 14:57:00 +0800 (CST) From: Tiezhu Yang To: Huacai Chen , Josh Poimboeuf , Peter Zijlstra Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v3 04/10] objtool: Handle PC relative relocation type Date: Tue, 19 Nov 2024 14:56:49 +0800 Message-ID: <20241119065655.21123-5-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20241119065655.21123-1-yangtiezhu@loongson.cn> References: <20241119065655.21123-1-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: qMiowMCxDuG4NjxnB_5cAA--.5437S6 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj93XoW7uFW7tr1fWw4DuF1kWFW7Awc_yoW8Jw4xpF y3u3y5KrsI9r17GwsrKa1kWrW5Cws7Wry7Xry09ry8ZF9xZF15Kay29a15Ca1UWwnYgayI vF9xKFy3A3WDA3gCm3ZEXasCq-sJn29KB7ZKAUJUUUUr529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUU9Fb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r106r15M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2kKe7AKxVWUXVWUAwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07 AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWU tVWrXwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7V AKI48JMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMxCIbckI1I0E14v2 6r1Y6r17MI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17 CEb7AF67AKxVWUAVWUtwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26ryj6F1UMIIF 0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIx AIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2 KfnxnUUI43ZEXa7IU8N6pPUUUUU== Content-Type: text/plain; charset="utf-8" When compling with Clang on LoongArch, there exists 32 bit PC relative relocation type, it needs to get the offset with "S + A - PC" according to the spec of "ELF for the LoongArch Architecture". This is preparation for later patch on LoongArch, there is no effect for the other archs with this patch. Link: https://github.com/loongson/la-abi-specs/blob/release/laelf.adoc Signed-off-by: Tiezhu Yang --- tools/objtool/check.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index af824bfd0973..eb4c89501493 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2118,6 +2118,11 @@ static int add_jump_table(struct objtool_file *file,= struct instruction *insn, if (reloc->sym->type =3D=3D STT_SECTION) { /* Addend field in the relocation entry associated with the symbol */ offset =3D reloc_addend(reloc); + /* Handle the special cases compiled with Clang on LoongArch */ + if (file->elf->ehdr.e_machine =3D=3D EM_LOONGARCH && + reloc_type(reloc) =3D=3D R_LARCH_32_PCREL) + offset =3D reloc->sym->offset + reloc_addend(reloc) - + (reloc_offset(reloc) - reloc_offset(table)); } else { /* The address of the symbol in the relocation entry */ offset =3D reloc->sym->offset; --=20 2.42.0