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 X-Spam-Level: X-Spam-Status: No, score=0.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88F51C433DB for ; Mon, 22 Feb 2021 18:50:21 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0E07D60232 for ; Mon, 22 Feb 2021 18:50:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0E07D60232 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:35812 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lEGHj-0006Yz-Ug for qemu-devel@archiver.kernel.org; Mon, 22 Feb 2021 13:50:19 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:60242) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lED4J-0005tL-Bz for qemu-devel@nongnu.org; Mon, 22 Feb 2021 10:24:15 -0500 Received: from mail-ua1-x930.google.com ([2607:f8b0:4864:20::930]:36498) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lED4H-00062k-OK for qemu-devel@nongnu.org; Mon, 22 Feb 2021 10:24:15 -0500 Received: by mail-ua1-x930.google.com with SMTP id i3so4436996uai.3 for ; Mon, 22 Feb 2021 07:24:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=ffGaIl6r7NLGXUmszFLaHOU0ip2w9N9HvkhF1fmw+9k=; b=C+oFI6k2XswHnP7bRkZGN/2c3YqYwBGqGXrgXcjRL5V6yaWermMPq7gU581jiQiyeD pkAEpv1Ry+XhXRVBewsezKiIb8YuNWoOMM1F2yPZO7nL2LIf8eSXgMRemY40KwKCD5yC w8NYZseCbg83PpDbfWmQY+CeU6PtyFAoWE2aVW2yHnFY88a0OyLL2erLpy/Vc6aMac5B CHxVuWcUIqNyzZuobS+ZwOpSi0lZZvMV98b9DFlg/DNdMmaj7Wf/X9GGmFEgCtG2Mxfn DBibI9GTklTk/cKjftAcfVs1aNdIYDp21ulnxbJ65MZUvgo9D285h5rUpaopYOf2OoCW scTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=ffGaIl6r7NLGXUmszFLaHOU0ip2w9N9HvkhF1fmw+9k=; b=V4VvcNo7wKiO2w+V49tZTCXALHyIbgNZEUKKMpnCOBqMWATqH95dJhpyjYcIjrZ01c SddZ6p2CktcayU1Ml/Epb8DW/L2Ziy98JswiQEeqyWzwzRDYdmGXhlHcFgy5YoU7loaz nPwowTD7EmGUM2BoIqVdwbSC2HH+5pWd9LIWVVWoNmCEEbpM8ibkcyeaoUB0452WPBBh 7dMDgikJj/ggzVQEuWZb6uM1A8mW9H7/G5SnOj/Zzg6I1MWlpRjyjOQrScowyyMarMQ/ uRYX4L0qg76X3jtsmCNOtOUgwKiKR408INBUl5KqLLi6elbrJKxKXcIRs4GZHsjw6Kce aZiQ== X-Gm-Message-State: AOAM532HQpPWtfWAdKIpsmg4KSzqbUqP16qF121I5gFncUJc4YDgRr+6 M4eRflnYQ3SXIfo7hrXzF1ys10LEJl7YE+VFf3CK5o7jj3o= X-Google-Smtp-Source: ABdhPJyzp/CYeEFTD4/WzW9cvdwINzU+lm9THMLBAZ/I8zP8cwN8WTFt3iKX0TvgFhX+tUVKTluhYL8YE+43Oe6HPDo= X-Received: by 2002:ab0:160f:: with SMTP id k15mr14410226uae.69.1614007452004; Mon, 22 Feb 2021 07:24:12 -0800 (PST) MIME-Version: 1.0 From: Annie Haramad Date: Mon, 22 Feb 2021 17:24:02 +0200 Message-ID: Subject: Weird behavior in cortex-A7 when disabling/enabling IRQ in ISR To: qemu-devel@nongnu.org Content-Type: multipart/alternative; boundary="000000000000d774b205bbee6456" Received-SPF: pass client-ip=2607:f8b0:4864:20::930; envelope-from=annieharamad@gmail.com; helo=mail-ua1-x930.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 22 Feb 2021 13:48:36 -0500 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --000000000000d774b205bbee6456 Content-Type: text/plain; charset="UTF-8" Hey, I have been running bare metal program on "mcimx7d-sabre" and I have a weird behavior that doesn't occur on a real hardware or at least I can't reproduce it on real hardware. I'm running a basic program that registers interrupt for serial, and then running in an infinite loop that formatting a string with vsnprintf, in the ISR I have disabled IRQ Interrupts (CPSID I) handled the interrupt and enabled IRQ Interrupts (CPISE I). After a while a data abort happens in the strlen with arg pointer as NULL that called in vsnprintf. When I run the same code but without the disable/enable IRQ everything works fine. You have any idea why does it happen? --000000000000d774b205bbee6456 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hey, I have been running bare metal program on "mcimx= 7d-sabre" and I have a weird behavior that doesn't occur on a real= hardware or at least I can't reproduce it on real hardware.

I'm running a basic program that registers interrupt for seria= l, and then running in an infinite loop that formatting a string with vsnpr= intf, in the ISR I have disabled IRQ Interrupts (CPSID I) handled the inter= rupt and enabled IRQ Interrupts (CPISE I). After a while a data abort happe= ns in the strlen with arg pointer as NULL that called in vsnprintf. When I = run the same code but without the disable/enable IRQ everything works fine.= You have any idea why does it happen?
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