From patchwork Thu Sep 30 07:11:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kefeng Wang X-Patchwork-Id: 1534706 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4HKksM0zDWz9sPT for ; Thu, 30 Sep 2021 17:10:15 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4HKksL6zb9z2ywr for ; Thu, 30 Sep 2021 17:10:14 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=huawei.com (client-ip=45.249.212.188; helo=szxga02-in.huawei.com; envelope-from=wangkefeng.wang@huawei.com; receiver=) Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4HKkrM5zH0z2ynw for ; Thu, 30 Sep 2021 17:09:23 +1000 (AEST) Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4HKkkt5J6Bz8yyF; Thu, 30 Sep 2021 15:04:38 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 30 Sep 2021 15:09:17 +0800 Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500001.china.huawei.com (7.185.36.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Thu, 30 Sep 2021 15:09:17 +0800 From: Kefeng Wang To: , , , , , , , , , Subject: [PATCH v4 06/11] sections: Provide internal __is_kernel() and __is_kernel_text() helper Date: Thu, 30 Sep 2021 15:11:38 +0800 Message-ID: <20210930071143.63410-7-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210930071143.63410-1-wangkefeng.wang@huawei.com> References: <20210930071143.63410-1-wangkefeng.wang@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kefeng Wang , paulus@samba.org, linux-alpha@vger.kernel.org, bpf@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" An internal __is_kernel() helper which only check the kernel address ranges, and an internal __is_kernel_text() helper which only check text section ranges. Signed-off-by: Kefeng Wang --- include/asm-generic/sections.h | 29 +++++++++++++++++++++++++++++ include/linux/kallsyms.h | 4 ++-- 2 files changed, 31 insertions(+), 2 deletions(-) diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h index 811583ca8bd0..a7abeadddc7a 100644 --- a/include/asm-generic/sections.h +++ b/include/asm-generic/sections.h @@ -186,4 +186,33 @@ static inline bool is_kernel_inittext(unsigned long addr) addr < (unsigned long)_einittext; } +/** + * __is_kernel_text - checks if the pointer address is located in the + * .text section + * + * @addr: address to check + * + * Returns: true if the address is located in .text, false otherwise. + * Note: an internal helper, only check the range of _stext to _etext. + */ +static inline bool __is_kernel_text(unsigned long addr) +{ + return addr >= (unsigned long)_stext && + addr < (unsigned long)_etext; +} + +/** + * __is_kernel - checks if the pointer address is located in the kernel range + * + * @addr: address to check + * + * Returns: true if the address is located in the kernel range, false otherwise. + * Note: an internal helper, only check the range of _stext to _end. + */ +static inline bool __is_kernel(unsigned long addr) +{ + return addr >= (unsigned long)_stext && + addr < (unsigned long)_end; +} + #endif /* _ASM_GENERIC_SECTIONS_H_ */ diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h index 8a9d329c927c..5fb17dd4b6fa 100644 --- a/include/linux/kallsyms.h +++ b/include/linux/kallsyms.h @@ -26,14 +26,14 @@ struct module; static inline int is_kernel_text(unsigned long addr) { - if ((addr >= (unsigned long)_stext && addr < (unsigned long)_etext)) + if (__is_kernel_text(addr)) return 1; return in_gate_area_no_mm(addr); } static inline int is_kernel(unsigned long addr) { - if (addr >= (unsigned long)_stext && addr < (unsigned long)_end) + if (__is_kernel(addr)) return 1; return in_gate_area_no_mm(addr); }