From patchwork Wed Mar 29 05:29:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Ghiti X-Patchwork-Id: 668714 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B727C6FD18 for ; Wed, 29 Mar 2023 05:31:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229734AbjC2Fbj (ORCPT ); Wed, 29 Mar 2023 01:31:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229728AbjC2Fbg (ORCPT ); Wed, 29 Mar 2023 01:31:36 -0400 Received: from mail-wr1-x434.google.com (mail-wr1-x434.google.com [IPv6:2a00:1450:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21A5D358E for ; Tue, 28 Mar 2023 22:31:35 -0700 (PDT) Received: by mail-wr1-x434.google.com with SMTP id q19so11305985wrc.5 for ; Tue, 28 Mar 2023 22:31:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20210112.gappssmtp.com; s=20210112; t=1680067893; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=znueE8Pjz+VVSGWqY7Odv2deVORd+PQf1G9dvU2f580=; b=RcfUdvTQifKB0+AVdk8JrXzwaJMK7YuAUA/YSj1CZ942v2C8skCQf7YhZm05RsyrBB B4HSFLSRrBz63LT+rYM4DoyzUKm2uGte1JmKH8/renUTipLEaoHQUHVAmwyN3w8/qk5j H00QzeWAI11ziHELL2oHdjOYApjcBfP2BTFqRF5oXalAE3WxwDc+4kCfca+NKq6ZF4Tw O5q9PHLvTF0t34WBg7Zr1zC7RybtgVm1Nooi4PcYYqQUJYU4h/zDifnGN22opyBF7GTi 8WsqMiVm1PoYyXx1GQ4NDpmyH10auRIjgiRlN8E50jY8S1cm/pjpS0uWWIPa63rLLXJZ g//w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680067893; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=znueE8Pjz+VVSGWqY7Odv2deVORd+PQf1G9dvU2f580=; b=ixic54Id3KwLuMlSALfxUQo0cRPXN/xqGvdXNrWn+VXYdtiVmefggmr1eMLmavohmV 1w7QubO16dmrWiQmd3btypL2DdRJewri66+Xl5BMPpD4L4Khx1QliQ962doRwwcwtMcF nz9tebmx2YLNsGixoAgRvAtEPG92Ks054j9RVRVqVC6plRIGjN8i0jz2Olm/pJPfpSA2 LKRu0ardeYOb1WAKo9YHIuzMKLgYFPTVFN0l0QgnCs/8eefm8GT7H6UwZ6P+tN5zvvgQ 7Pnc5JyKtAj56972yNxnpgu3ELynEzdz7LgdnUFAwpliqaSzVtZIfy0gdnlqqhCDhmKN jX5g== X-Gm-Message-State: AAQBX9f6H1IwvET8HY/tJ9ai1zfyJa/di/zbjpB3pR6dCrr7sLT81BTS paNCLSHtW6ZS3hbpaACBravfzw== X-Google-Smtp-Source: AKy350ZQA2X3X6P/fk/NYMnW9OxEeG65DsaOPoXSAsl+epZ0EvGOmNiFwst6GIavVoNURPbPTM+gLw== X-Received: by 2002:a5d:4041:0:b0:2d7:a1e2:f5 with SMTP id w1-20020a5d4041000000b002d7a1e200f5mr12656353wrp.55.1680067893656; Tue, 28 Mar 2023 22:31:33 -0700 (PDT) Received: from alex-rivos.ba.rivosinc.com (amontpellier-656-1-456-62.w92-145.abo.wanadoo.fr. [92.145.124.62]) by smtp.gmail.com with ESMTPSA id e11-20020a5d65cb000000b002c55de1c72bsm29119956wrw.62.2023.03.28.22.31.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Mar 2023 22:31:33 -0700 (PDT) From: Alexandre Ghiti To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Ard Biesheuvel , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Alexandre Ghiti , Zong Li Subject: [PATCH v2 2/4] riscv: Dump out kernel offset information on panic Date: Wed, 29 Mar 2023 07:29:24 +0200 Message-Id: <20230329052926.69632-3-alexghiti@rivosinc.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20230329052926.69632-1-alexghiti@rivosinc.com> References: <20230329052926.69632-1-alexghiti@rivosinc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org Dump out the KASLR virtual kernel offset when panic to help debug kernel. Signed-off-by: Zong Li Signed-off-by: Alexandre Ghiti --- arch/riscv/kernel/setup.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 376d2827e736..c6937839bbd8 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -333,3 +334,27 @@ void free_initmem(void) free_initmem_default(POISON_FREE_INITMEM); } + +static int dump_kernel_offset(struct notifier_block *self, + unsigned long v, void *p) +{ + pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n", + kernel_map.virt_offset, + KERNEL_LINK_ADDR); + + return 0; +} + +static struct notifier_block kernel_offset_notifier = { + .notifier_call = dump_kernel_offset +}; + +static int __init register_kernel_offset_dumper(void) +{ + if (IS_ENABLED(CONFIG_RANDOMIZE_BASE)) + atomic_notifier_chain_register(&panic_notifier_list, + &kernel_offset_notifier); + + return 0; +} +device_initcall(register_kernel_offset_dumper);