From owner-freebsd-drivers@freebsd.org Mon Jan 22 13:48:02 2018 Return-Path: Delivered-To: freebsd-drivers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9EB86EC1DBD for ; Mon, 22 Jan 2018 13:48:02 +0000 (UTC) (envelope-from officem4790@gmail.com) Received: from mail-io0-x229.google.com (mail-io0-x229.google.com [IPv6:2607:f8b0:4001:c06::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6820A7C902 for ; Mon, 22 Jan 2018 13:48:02 +0000 (UTC) (envelope-from officem4790@gmail.com) Received: by mail-io0-x229.google.com with SMTP id f34so9449205ioi.13 for ; Mon, 22 Jan 2018 05:48:02 -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=fTogg40cfgSWDwiJ3OVEW3t9PiOlc2RdIt75sDsmeTg=; b=tGJnUmZtD4fY5UNSdzihLlQckhvWMOm/9+Orc9/nMjMtmVLDEQcZjZ8JW8TtnwmAy4 myBqi3i/G671XjNyzVCJZ6YXdW2ypLfJfKTXRKHW2JUvjAiOjn1qyu+b8QkAyLZEs+KP WfZl8yOMneUvkXvDBBmKcQFkLipEKNNdtE3OAOjpy89mb2gqYzPNUlex3RPceB3+OTj/ ufLxpHa/RnNVpSKOnlaJiavm6vOey0oJyDWTr6NpC6VAo35Xeg9tzZWrnf7foElpRHoC SEcxmNWolWquluHjDBBqR0kZ4mOaNPAoh+PoQ0oF1HoAD7SMpNieN/LOkIDrIMqrTKwT FtWg== 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=fTogg40cfgSWDwiJ3OVEW3t9PiOlc2RdIt75sDsmeTg=; b=cH4TwRBUgsCOhTCO2UMswNKD66wSc8NQRlRabcAyrfl5z+Z1A3lcMyi5cZsKxFn6gT uWLheWyoHOuRiwc2yqSJ9Ql/tobLjhTgNXbPJibILDDpI7mrfkd5EVDT+8AyNegc7IXg c2gyZoOD8WFgBa2ib+PV1t3RWe42mRaLNxtLY+uj7+3Spbo4m1oDWubhP7LC03T1l7WV rkyKBR44ax2nXVLEjzU9fzHb2eyIFY0JhhTqqrwCVQWAxXlfDuTJuqP3Y6XGab7B8pQ2 kSW8ktrphb1zPBeUc+B9pfnjeaEHy4R4FtQCG+I0JohXhc20FrPAeHPwqFxqUIFVGLXK ldhg== X-Gm-Message-State: AKwxytcTOlP/IGT1nK1nAWwik9qd2Qqg3vtZCb06BffTfAERUCjkDI/3 n0gsm1MW1LL4sg3b/eU3KpY8axRPj/Y8yYs7thnWww== X-Google-Smtp-Source: AH8x226dmZBS3CTJGyq672G1xmX3zHddK/82W+q76m+e2GUqRP+6A84c1/47P0W/S34ODMdd3yDcl0s7NLPbcSWtZxE= X-Received: by 10.107.147.3 with SMTP id v3mr4104162iod.78.1516628881376; Mon, 22 Jan 2018 05:48:01 -0800 (PST) MIME-Version: 1.0 Received: by 10.107.28.194 with HTTP; Mon, 22 Jan 2018 05:48:00 -0800 (PST) From: Office Manager Date: Mon, 22 Jan 2018 15:48:00 +0200 Message-ID: Subject: Creating a KLD to dump memory To: freebsd-drivers@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-drivers@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Writing device drivers for FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Jan 2018 13:48:02 -0000 Hi, I'm trying to create a kernel module to dump the memory of a machine like lime . Right now I'm using memrw implementation to read the physical memory, my problem with this method is the garbage pages that return a page filled with 0xFF's. How can I create a dump containing only the physical available memory? e.g my machine has 256mb so I want a 256mb memory dump. Thanks.