From patchwork Mon Dec 11 13:22:26 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikhail Abakumov X-Patchwork-Id: 847010 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3ywP7C2V97z9s0g for ; Tue, 12 Dec 2017 00:33:59 +1100 (AEDT) Received: from localhost ([::1]:53045 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOODV-0005CW-Dk for incoming@patchwork.ozlabs.org; Mon, 11 Dec 2017 08:33:57 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33695) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOO2d-0001DP-33 for qemu-devel@nongnu.org; Mon, 11 Dec 2017 08:22:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eOO2c-0002EU-1T for qemu-devel@nongnu.org; Mon, 11 Dec 2017 08:22:43 -0500 Received: from mail.ispras.ru ([83.149.199.45]:43496) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eOO2b-0002E7-LD for qemu-devel@nongnu.org; Mon, 11 Dec 2017 08:22:41 -0500 Received: from Misha-PC.lan02.inno (unknown [85.142.117.226]) by mail.ispras.ru (Postfix) with ESMTPSA id E7D6854006A; Mon, 11 Dec 2017 16:22:40 +0300 (MSK) From: Mihail Abakumov To: qemu-devel@nongnu.org Date: Mon, 11 Dec 2017 16:22:26 +0300 Message-ID: <151299854627.4808.8985926737545500633.stgit@Misha-PC.lan02.inno> In-Reply-To: <151299847127.4808.14646046517426494416.stgit@Misha-PC.lan02.inno> References: <151299847127.4808.14646046517426494416.stgit@Misha-PC.lan02.inno> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 83.149.199.45 Subject: [Qemu-devel] [PATCH v4 12/46] windbg: send data and control packets X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sw@weilnetz.de, lprosek@redhat.com, dovgaluk@ispras.ru, rkagan@virtuozzo.com, pbonzini@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Added functions for send data and control packets to windbg. Signed-off-by: Mihail Abakumov Signed-off-by: Pavel Dovgalyuk Signed-off-by: Dmitriy Koltunov --- windbgstub.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/windbgstub.c b/windbgstub.c index ace992e2cb..8c33e0de0a 100755 --- a/windbgstub.c +++ b/windbgstub.c @@ -60,6 +60,62 @@ typedef struct WindbgState { static WindbgState *windbg_state; +static uint32_t compute_checksum(uint8_t *data, uint16_t len) +{ + uint32_t checksum = 0; + while (len) { + --len; + checksum += *data++; + } + return checksum; +} + +__attribute__ ((unused)) /* unused yet */ +static void windbg_send_data_packet(uint8_t *data, uint16_t byte_count, + uint16_t type) +{ + uint8_t trailing_byte = PACKET_TRAILING_BYTE; + + KD_PACKET packet = { + .PacketLeader = PACKET_LEADER, + .PacketType = type, + .ByteCount = byte_count, + .PacketId = windbg_state->data_packet_id, + .Checksum = compute_checksum(data, byte_count) + }; + + stw_p(&packet.PacketType, packet.PacketType); + stw_p(&packet.ByteCount, packet.ByteCount); + stl_p(&packet.PacketId, packet.PacketId); + stl_p(&packet.Checksum, packet.Checksum); + + qemu_chr_fe_write(&windbg_state->chr, PTR(packet), sizeof(packet)); + qemu_chr_fe_write(&windbg_state->chr, data, byte_count); + qemu_chr_fe_write(&windbg_state->chr, &trailing_byte, + sizeof(trailing_byte)); + + windbg_state->data_packet_id ^= 1; +} + +__attribute__ ((unused)) /* unused yet */ +static void windbg_send_control_packet(uint16_t type) +{ + KD_PACKET packet = { + .PacketLeader = CONTROL_PACKET_LEADER, + .PacketType = type, + .ByteCount = 0, + .PacketId = windbg_state->ctrl_packet_id, + .Checksum = 0 + }; + + stw_p(&packet.PacketType, packet.PacketType); + stl_p(&packet.PacketId, packet.PacketId); + + qemu_chr_fe_write(&windbg_state->chr, PTR(packet), sizeof(packet)); + + windbg_state->ctrl_packet_id ^= 1; +} + static void windbg_ctx_handler(ParsingContext *ctx) {}