From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.librecores.org (lists.librecores.org [88.198.125.70]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18D32C433FE for ; Tue, 17 May 2022 00:55:42 +0000 (UTC) Received: from [172.31.1.100] (localhost.localdomain [127.0.0.1]) by mail.librecores.org (Postfix) with ESMTP id 6244F2496F; Tue, 17 May 2022 02:55:41 +0200 (CEST) Received: from mail-pf1-f175.google.com (mail-pf1-f175.google.com [209.85.210.175]) by mail.librecores.org (Postfix) with ESMTPS id 3488324970 for ; Tue, 17 May 2022 02:55:40 +0200 (CEST) Received: by mail-pf1-f175.google.com with SMTP id 204so15548142pfx.3 for ; Mon, 16 May 2022 17:55:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=URPrkUOTksZy0vkIOlXm6I32VTQjSzL208bMcPxmSHk=; b=UupvaoPH523tK0FTB32h9+ccvRKp5igs/DWMORUUtCOWOso6fYzWmPV+1a1zyTdqcf du5DS5q7UYYny+lco4UHxNUe3g5wjcaAjf+2mpilM4MX2LQrmQVChFFq4njBYqqd7aWN PS875JvWku0ngw3WBdywFS5kRHOrXvF3wvwqRT+BlF0HTPedbYu8zAMqPXquJCdDm5iN Fs1QKOhsrYQAYijAjK9eyaxDeQuad7fkz/TccnfzfSVMZibZpptOdBr7/FR1bvRTJmth 1D3SPUI66RyKUk23pqzp5FBv5lPmiPsEp9cc1SSCLxuVHYc/NBd/LnoUj6QU33lsSkoi e1RQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=URPrkUOTksZy0vkIOlXm6I32VTQjSzL208bMcPxmSHk=; b=6IsiuumyBXTYj03ISOsWB0XgX7xLsgifAlDMzk+xQyIQooP+7SU9Bw8JRlazC5g7VE OYhFyxZrZcuK757psu+Au9P2aTdZfNHCr964FlURN87M0t9uUMVQQ2Dn6GML/8ocRwfq ti77VT4rq3/o3dLzGfxB7afiEdeC0c6Y4DqaPXASABx+LvN6/Zv/Fk0FIh8vb7RY3QNo /3DpEfB1ZrWrHGu4hhT7RGH4pVt1vObNaI68pZ68SZU48YJT/teXzfWU8t2Mupx30st5 RBurEZR2NaIEMPPNjKsDdtZbMNrB1EnqvCWdhd5PrWZP9TXTd1J2acpk1F5Z4NIZI3Im 4Fqw== X-Gm-Message-State: AOAM533T1m9qNJzP8LOKSACsN4TygJqQartFiJ9wF5w/gfSRkpAXXY+l Hlu3/rH4Mm23FAoY9J/00CU= X-Google-Smtp-Source: ABdhPJyZJpbgtHCnP93HtiV36JN+8M71Eq1x/qZGWWPpnNp/RLPeQVQ7W2jRJDrqPdRD3V8yp3zEzQ== X-Received: by 2002:a65:6297:0:b0:3db:4820:2867 with SMTP id f23-20020a656297000000b003db48202867mr16938361pgv.503.1652748938816; Mon, 16 May 2022 17:55:38 -0700 (PDT) Received: from localhost ([2409:10:24a0:4700:e8ad:216a:2a9d:6d0c]) by smtp.gmail.com with ESMTPSA id cs20-20020a17090af51400b001df5dea7d4bsm282211pjb.43.2022.05.16.17.55.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 May 2022 17:55:38 -0700 (PDT) From: Stafford Horne To: LKML Subject: [PATCH v2 04/13] openrisc: Add syscall details to emergency syscall debugging Date: Tue, 17 May 2022 09:55:01 +0900 Message-Id: <20220517005510.3500105-5-shorne@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220517005510.3500105-1-shorne@gmail.com> References: <20220517005510.3500105-1-shorne@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: openrisc@lists.librecores.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Discussion around the OpenRISC processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jonas Bonn , Petr Mladek , Chris Down , Mark Rutland , Randy Dunlap , Andy Shevchenko , Openrisc , Andrey Bacherov Errors-To: openrisc-bounces@lists.librecores.org Sender: "OpenRISC" When bringing linux on the or1k Marocchino we ran into issues starting init. This patch adds the syscall number and return address to assist tracing syscalls even before strace is able to be used. By default this is all disabled but a developer could adjust the ifdef to enable debugging. Cc: Andrey Bacherov Signed-off-by: Stafford Horne --- arch/openrisc/kernel/entry.S | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index 3ca1b1f490b9..54a87bba35ca 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -601,7 +601,7 @@ UNHANDLED_EXCEPTION(_vector_0xb00,0xb00) */ _string_syscall_return: - .string "syscall return %ld \n\r\0" + .string "syscall r9:0x%08x -> syscall(%ld) return %ld\0" .align 4 ENTRY(_sys_call_handler) @@ -679,15 +679,25 @@ _syscall_return: _syscall_debug: l.movhi r3,hi(_string_syscall_return) l.ori r3,r3,lo(_string_syscall_return) - l.ori r27,r0,1 + l.ori r27,r0,2 l.sw -4(r1),r27 l.sw -8(r1),r11 - l.addi r1,r1,-8 + l.lwz r29,PT_ORIG_GPR11(r1) + l.sw -12(r1),r29 + l.lwz r29,PT_GPR9(r1) + l.sw -16(r1),r29 l.movhi r27,hi(_printk) l.ori r27,r27,lo(_printk) l.jalr r27 - l.nop - l.addi r1,r1,8 + l.addi r1,r1,-16 + l.addi r1,r1,16 +#endif +#if 0 +_syscall_show_regs: + l.movhi r27,hi(show_registers) + l.ori r27,r27,lo(show_registers) + l.jalr r27 + l.or r3,r1,r1 #endif _syscall_check_trace_leave: -- 2.31.1