{"id":818549,"url":"http://patchwork.ozlabs.org/api/patches/818549/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/150642390797.3900.15056414492991775809.stgit@Misha-PC.lan02.inno/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<150642390797.3900.15056414492991775809.stgit@Misha-PC.lan02.inno>","list_archive_url":null,"date":"2017-09-26T11:05:08","name":"[11/43] windbg: parsing data stream","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"0a78bffc8c6ffc0cf6527a788ac402637c3a71ff","submitter":{"id":71645,"url":"http://patchwork.ozlabs.org/api/people/71645/?format=json","name":"Mikhail Abakumov","email":"mikhail.abakumov@ispras.ru"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/150642390797.3900.15056414492991775809.stgit@Misha-PC.lan02.inno/mbox/","series":[{"id":5104,"url":"http://patchwork.ozlabs.org/api/series/5104/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=5104","date":"2017-09-26T11:04:06","name":"Windbg supporting","version":1,"mbox":"http://patchwork.ozlabs.org/series/5104/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/818549/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/818549/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y1dft6480z9tXP\n\tfor ;\n\tTue, 26 Sep 2017 21:15:49 +1000 (AEST)","from localhost ([::1]:46744 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dwnq3-0004C4-9b\n\tfor incoming@patchwork.ozlabs.org; Tue, 26 Sep 2017 07:15:43 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:59245)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dwng0-0003mQ-4R\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:24 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dwnfq-0000VE-GT\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:20 -0400","from mail.ispras.ru ([83.149.199.45]:51818)\n\tby eggs.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dwnfq-0000Tw-5t\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 07:05:10 -0400","from Misha-PC.lan02.inno (unknown [85.142.117.226])\n\tby mail.ispras.ru (Postfix) with ESMTPSA id 71A5254009E;\n\tTue, 26 Sep 2017 14:05:09 +0300 (MSK)"],"From":"Mihail Abakumov ","To":"qemu-devel@nongnu.org","Date":"Tue, 26 Sep 2017 14:05:08 +0300","Message-ID":"<150642390797.3900.15056414492991775809.stgit@Misha-PC.lan02.inno>","In-Reply-To":"<150642384156.3900.3326424823772221077.stgit@Misha-PC.lan02.inno>","References":"<150642384156.3900.3326424823772221077.stgit@Misha-PC.lan02.inno>","User-Agent":"StGit/0.17.1-dirty","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 3.x [fuzzy]","X-Received-From":"83.149.199.45","Subject":"[Qemu-devel] [PATCH 11/43] windbg: parsing data stream","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"sw@weilnetz.de, lprosek@redhat.com, dovgaluk@ispras.ru,\n\trkagan@virtuozzo.com, pbonzini@redhat.com, den@openvz.org","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"},"content":"Added function of parsing data stream from windbg to packet.\n\nSigned-off-by: Mihail Abakumov \nSigned-off-by: Pavel Dovgalyuk \nSigned-off-by: Dmitriy Koltunov \n---\n windbgstub.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-\n 1 file changed, 110 insertions(+), 1 deletion(-)","diff":"diff --git a/windbgstub.c b/windbgstub.c\nindex 32984d0f92..7bc3585e53 100755\n--- a/windbgstub.c\n+++ b/windbgstub.c\n@@ -57,6 +57,105 @@ typedef struct WindbgState {\n \n static WindbgState *windbg_state;\n \n+static void windbg_ctx_handler(ParsingContext *ctx)\n+{}\n+\n+static void windbg_read_byte(ParsingContext *ctx, uint8_t byte)\n+{\n+ switch (ctx->state) {\n+ case STATE_LEADER:\n+ ctx->result = RESULT_NONE;\n+ if (byte == PACKET_LEADER_BYTE || byte == CONTROL_PACKET_LEADER_BYTE) {\n+ if (ctx->index > 0 && byte != PTR(ctx->packet.PacketLeader)[0]) {\n+ ctx->index = 0;\n+ }\n+ PTR(ctx->packet.PacketLeader)[ctx->index] = byte;\n+ ++ctx->index;\n+ if (ctx->index == sizeof(ctx->packet.PacketLeader)) {\n+ ctx->state = STATE_PACKET_TYPE;\n+ ctx->index = 0;\n+ }\n+ } else if (byte == BREAKIN_PACKET_BYTE) {\n+ ctx->result = RESULT_BREAKIN_BYTE;\n+ ctx->index = 0;\n+ } else {\n+ ctx->index = 0;\n+ }\n+ break;\n+\n+ case STATE_PACKET_TYPE:\n+ PTR(ctx->packet.PacketType)[ctx->index] = byte;\n+ ++ctx->index;\n+ if (ctx->index == sizeof(ctx->packet.PacketType)) {\n+ ctx->packet.PacketType = lduw_p(&ctx->packet.PacketType);\n+ if (ctx->packet.PacketType >= PACKET_TYPE_MAX) {\n+ ctx->state = STATE_LEADER;\n+ ctx->result = RESULT_UNKNOWN_PACKET;\n+ } else {\n+ ctx->state = STATE_PACKET_BYTE_COUNT;\n+ }\n+ ctx->index = 0;\n+ }\n+ break;\n+\n+ case STATE_PACKET_BYTE_COUNT:\n+ PTR(ctx->packet.ByteCount)[ctx->index] = byte;\n+ ++ctx->index;\n+ if (ctx->index == sizeof(ctx->packet.ByteCount)) {\n+ ctx->packet.ByteCount = lduw_p(&ctx->packet.ByteCount);\n+ ctx->state = STATE_PACKET_ID;\n+ ctx->index = 0;\n+ }\n+ break;\n+\n+ case STATE_PACKET_ID:\n+ PTR(ctx->packet.PacketId)[ctx->index] = byte;\n+ ++ctx->index;\n+ if (ctx->index == sizeof(ctx->packet.PacketId)) {\n+ ctx->packet.PacketId = ldl_p(&ctx->packet.PacketId);\n+ ctx->state = STATE_PACKET_CHECKSUM;\n+ ctx->index = 0;\n+ }\n+ break;\n+\n+ case STATE_PACKET_CHECKSUM:\n+ PTR(ctx->packet.Checksum)[ctx->index] = byte;\n+ ++ctx->index;\n+ if (ctx->index == sizeof(ctx->packet.Checksum)) {\n+ ctx->packet.Checksum = ldl_p(&ctx->packet.Checksum);\n+ if (ctx->packet.PacketLeader == CONTROL_PACKET_LEADER) {\n+ ctx->state = STATE_LEADER;\n+ ctx->result = RESULT_CONTROL_PACKET;\n+ } else if (ctx->packet.ByteCount > PACKET_MAX_SIZE) {\n+ ctx->state = STATE_LEADER;\n+ ctx->result = RESULT_ERROR;\n+ } else {\n+ ctx->state = STATE_PACKET_DATA;\n+ }\n+ ctx->index = 0;\n+ }\n+ break;\n+\n+ case STATE_PACKET_DATA:\n+ ctx->data.buf[ctx->index] = byte;\n+ ++ctx->index;\n+ if (ctx->index == ctx->packet.ByteCount) {\n+ ctx->state = STATE_TRAILING_BYTE;\n+ ctx->index = 0;\n+ }\n+ break;\n+\n+ case STATE_TRAILING_BYTE:\n+ if (byte == PACKET_TRAILING_BYTE) {\n+ ctx->result = RESULT_DATA_PACKET;\n+ } else {\n+ ctx->result = RESULT_ERROR;\n+ }\n+ ctx->state = STATE_LEADER;\n+ break;\n+ }\n+}\n+\n static int windbg_chr_can_receive(void *opaque)\n {\n return PACKET_MAX_SIZE;\n@@ -64,8 +163,18 @@ static int windbg_chr_can_receive(void *opaque)\n \n static void windbg_chr_receive(void *opaque, const uint8_t *buf, int size)\n {\n+ static ParsingContext ctx = {\n+ .state = STATE_LEADER,\n+ .result = RESULT_NONE,\n+ .name = \"\"\n+ };\n+\n if (windbg_state->is_loaded) {\n- /* T0D0: parse data */\n+ int i;\n+ for (i = 0; i < size; i++) {\n+ windbg_read_byte(&ctx, buf[i]);\n+ windbg_ctx_handler(&ctx);\n+ }\n }\n }\n \n","prefixes":["11/43"]}