From patchwork Thu Mar 2 19:08:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 1750967 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=QSkntCo8; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4PSLMV3Q5Gz23j7 for ; Fri, 3 Mar 2023 06:12:22 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pXoIZ-0007RO-97; Thu, 02 Mar 2023 14:09:03 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pXoIX-0007P2-76 for qemu-devel@nongnu.org; Thu, 02 Mar 2023 14:09:01 -0500 Received: from mail-wm1-x331.google.com ([2a00:1450:4864:20::331]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pXoIN-0004Vm-Ng for qemu-devel@nongnu.org; Thu, 02 Mar 2023 14:09:00 -0500 Received: by mail-wm1-x331.google.com with SMTP id j3so294449wms.2 for ; Thu, 02 Mar 2023 11:08:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=0VnUmt7qfbdjJswH/byMgVhjPRUgQaVzwcTJc8xq4ac=; b=QSkntCo8//QHM+qN2ra4aI8hdkWC+ht0pBvtV383mIUzalM5SwPcmcZfLUyAf9WYae 6xRvwgRL/BefaIVvH5sxpRloJtVY4fWPd48n0K4MAM2YjV8IMjaDeiv4VEcq4bz58ljQ okzFyfaO4pxrNnk5QcuyBhLHG1PKN3BxQ7acuYBVQNY6tuoroKGOU8JqhyC75XCTL+zd 6KBTecHx/arxunAFc4rRJd+EEp/CkjufYmAhWPOK+K9aZlLtFtagG3rMtasSL83kxSkd rcaiCnJDqE2NvCMwnaAWPYO3Qxtj0yWqj/vqXixwY3NzKN/qVNPI6y2TKGBrYMY8aGU/ P2lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0VnUmt7qfbdjJswH/byMgVhjPRUgQaVzwcTJc8xq4ac=; b=BVZ7VLvpHKGN82YSZKuCFwIxA8vvXULY3X7SetWoOYm4+qjHi+rLXtz8nlDfdOAMyK GtuhRcS4AXJW3Ii5KU8Xlp4gj5YxAHMcy8WlECPE7do1ZAk5TD07/Ihldfqk9JVitsDQ Nx/iFHwi3z2d/9Sh4uth55nnkwgEBRpUUppf3fAULE2LZyuG+Lr70h/y7/dJlWEOCOSz Y8jrU9UA8V8AmsoMIxefHhRUPn26zaJXkn80KL0VIituUcA5KU5zF5R4U/4hPo/W8HC6 VRSAwqXKr3fsbLN3TXcDtrqB03ovJI2tOho9kLtYC6j71BSVf+s9TGP5HPLHjAYcH2tX wnJw== X-Gm-Message-State: AO0yUKWj7hjQTvlesAiFBKRDQmXMBaTyT6DH0I1MbbG0Yf9IYOLid3Qv mXVCMe9FjGkAMdBmrUbXgXZ+MQ== X-Google-Smtp-Source: AK7set9jLa15pVk9h+VS90mNQ/EzlL9CbZ10zFu9ShNxHjncJQlY3cx5qMvRKMMj39b4FkvcLDkmAQ== X-Received: by 2002:a05:600c:a45:b0:3ea:f883:180 with SMTP id c5-20020a05600c0a4500b003eaf8830180mr8878958wmq.7.1677784129606; Thu, 02 Mar 2023 11:08:49 -0800 (PST) Received: from zen.linaroharston ([85.9.250.243]) by smtp.gmail.com with ESMTPSA id o10-20020a05600c164a00b003e20cf0408esm328831wmn.40.2023.03.02.11.08.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Mar 2023 11:08:48 -0800 (PST) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 232F51FFBD; Thu, 2 Mar 2023 19:08:47 +0000 (GMT) From: =?utf-8?q?Alex_Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: Weiwei Li , =?utf-8?q?C=C3=A9dric_Le_Goater?= , Palmer Dabbelt , Laurent Vivier , nicolas.eder@lauterbach.com, Ilya Leoshkevich , kvm@vger.kernel.org, "Edgar E. Iglesias" , David Gibson , Max Filippov , Sunil Muthuswamy , qemu-s390x@nongnu.org, Stafford Horne , Bin Meng , Marek Vasut , Greg Kurz , Song Gao , Aleksandar Rikalo , Liu Zhiwei , Alistair Francis , Chris Wulff , qemu-riscv@nongnu.org, Michael Rolnik , qemu-arm@nongnu.org, Cleber Rosa , Artyom Tarasenko , Marcel Apfelbaum , Eduardo Habkost , Yoshinori Sato , Alexandre Iooss , Daniel Henrique Barboza , Jiaxun Yang , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , mads@ynddal.dk, Mark Cave-Ayland , qemu-ppc@nongnu.org, Richard Henderson , John Snow , Xiaojuan Yang , Thomas Huth , Paolo Bonzini , Mahmoud Mandour , Aurelien Jarno , Bastian Koppelmann , Yanan Wang , David Hildenbrand , Taylor Simpson , Peter Maydell , =?utf-8?q?Alex_Benn=C3=A9e?= Subject: [PATCH v4 05/26] gdbstub: define separate user/system structures Date: Thu, 2 Mar 2023 19:08:25 +0000 Message-Id: <20230302190846.2593720-6-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230302190846.2593720-1-alex.bennee@linaro.org> References: <20230302190846.2593720-1-alex.bennee@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::331; envelope-from=alex.bennee@linaro.org; helo=mail-wm1-x331.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org In preparation for moving user/softmmu specific bits from the main gdbstub file we need to separate the connection details into a user/softmmu state. As these will eventually be defined in their own files we move them out of the common GDBState structure. Reviewed-by: Richard Henderson Signed-off-by: Alex Bennée --- v3 - split into gdbserver_[user|system]_state now to avoid later hoop jumping --- gdbstub/gdbstub.c | 94 ++++++++++++++++++++++++++--------------------- 1 file changed, 53 insertions(+), 41 deletions(-) diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c index 63b56f0027..1e6f8978b5 100644 --- a/gdbstub/gdbstub.c +++ b/gdbstub/gdbstub.c @@ -341,6 +341,22 @@ enum RSState { RS_CHKSUM1, RS_CHKSUM2, }; + +#ifdef CONFIG_USER_ONLY +typedef struct { + int fd; + char *socket_path; + int running_state; +} GDBUserState; +static GDBUserState gdbserver_user_state; +#else +typedef struct { + CharBackend chr; + Chardev *mon_chr; +} GDBSystemState; +static GDBSystemState gdbserver_system_state; +#endif + typedef struct GDBState { bool init; /* have we been initialised? */ CPUState *c_cpu; /* current CPU for step/continue ops */ @@ -353,14 +369,6 @@ typedef struct GDBState { int line_csum; /* checksum at the end of the packet */ GByteArray *last_packet; int signal; -#ifdef CONFIG_USER_ONLY - int fd; - char *socket_path; - int running_state; -#else - CharBackend chr; - Chardev *mon_chr; -#endif bool multiprocess; GDBProcess *processes; int process_num; @@ -412,15 +420,17 @@ static int get_char(void) int ret; for(;;) { - ret = recv(gdbserver_state.fd, &ch, 1, 0); + ret = recv(gdbserver_user_state.fd, &ch, 1, 0); if (ret < 0) { - if (errno == ECONNRESET) - gdbserver_state.fd = -1; - if (errno != EINTR) + if (errno == ECONNRESET) { + gdbserver_user_state.fd = -1; + } + if (errno != EINTR) { return -1; + } } else if (ret == 0) { - close(gdbserver_state.fd); - gdbserver_state.fd = -1; + close(gdbserver_user_state.fd); + gdbserver_user_state.fd = -1; return -1; } else { break; @@ -479,7 +489,7 @@ static inline void gdb_continue(void) { #ifdef CONFIG_USER_ONLY - gdbserver_state.running_state = 1; + gdbserver_user_state.running_state = 1; trace_gdbstub_op_continue(); #else if (!runstate_needs_reset()) { @@ -508,7 +518,7 @@ static int gdb_continue_partial(char *newstates) cpu_single_step(cpu, gdbserver_state.sstep_flags); } } - gdbserver_state.running_state = 1; + gdbserver_user_state.running_state = 1; #else int flag = 0; @@ -560,7 +570,7 @@ static void put_buffer(const uint8_t *buf, int len) int ret; while (len > 0) { - ret = send(gdbserver_state.fd, buf, len, 0); + ret = send(gdbserver_user_state.fd, buf, len, 0); if (ret < 0) { if (errno != EINTR) return; @@ -572,7 +582,7 @@ static void put_buffer(const uint8_t *buf, int len) #else /* XXX this blocks entire thread. Rewrite to use * qemu_chr_fe_write and background I/O callbacks */ - qemu_chr_fe_write_all(&gdbserver_state.chr, buf, len); + qemu_chr_fe_write_all(&gdbserver_system_state.chr, buf, len); #endif } @@ -2094,7 +2104,8 @@ static void handle_query_rcmd(GArray *params, void *user_ctx) len = len / 2; hextomem(gdbserver_state.mem_buf, get_param(params, 0)->data, len); g_byte_array_append(gdbserver_state.mem_buf, &zero, 1); - qemu_chr_be_write(gdbserver_state.mon_chr, gdbserver_state.mem_buf->data, + qemu_chr_be_write(gdbserver_system_state.mon_chr, + gdbserver_state.mem_buf->data, gdbserver_state.mem_buf->len); put_packet("OK"); } @@ -3027,10 +3038,10 @@ void gdb_exit(int code) return; } #ifdef CONFIG_USER_ONLY - if (gdbserver_state.socket_path) { - unlink(gdbserver_state.socket_path); + if (gdbserver_user_state.socket_path) { + unlink(gdbserver_user_state.socket_path); } - if (gdbserver_state.fd < 0) { + if (gdbserver_user_state.fd < 0) { return; } #endif @@ -3041,7 +3052,7 @@ void gdb_exit(int code) put_packet(buf); #ifndef CONFIG_USER_ONLY - qemu_chr_fe_deinit(&gdbserver_state.chr, true); + qemu_chr_fe_deinit(&gdbserver_system_state.chr, true); #endif } @@ -3077,7 +3088,7 @@ gdb_handlesig(CPUState *cpu, int sig) char buf[256]; int n; - if (!gdbserver_state.init || gdbserver_state.fd < 0) { + if (!gdbserver_state.init || gdbserver_user_state.fd < 0) { return sig; } @@ -3095,15 +3106,15 @@ gdb_handlesig(CPUState *cpu, int sig) } /* put_packet() might have detected that the peer terminated the connection. */ - if (gdbserver_state.fd < 0) { + if (gdbserver_user_state.fd < 0) { return sig; } sig = 0; gdbserver_state.state = RS_IDLE; - gdbserver_state.running_state = 0; - while (gdbserver_state.running_state == 0) { - n = read(gdbserver_state.fd, buf, 256); + gdbserver_user_state.running_state = 0; + while (gdbserver_user_state.running_state == 0) { + n = read(gdbserver_user_state.fd, buf, 256); if (n > 0) { int i; @@ -3114,9 +3125,9 @@ gdb_handlesig(CPUState *cpu, int sig) /* XXX: Connection closed. Should probably wait for another connection before continuing. */ if (n == 0) { - close(gdbserver_state.fd); + close(gdbserver_user_state.fd); } - gdbserver_state.fd = -1; + gdbserver_user_state.fd = -1; return sig; } } @@ -3130,7 +3141,7 @@ void gdb_signalled(CPUArchState *env, int sig) { char buf[4]; - if (!gdbserver_state.init || gdbserver_state.fd < 0) { + if (!gdbserver_state.init || gdbserver_user_state.fd < 0) { return; } @@ -3145,7 +3156,7 @@ static void gdb_accept_init(int fd) gdbserver_state.processes[0].attached = true; gdbserver_state.c_cpu = gdb_first_attached_cpu(); gdbserver_state.g_cpu = gdbserver_state.c_cpu; - gdbserver_state.fd = fd; + gdbserver_user_state.fd = fd; gdb_has_xml = false; } @@ -3277,7 +3288,7 @@ int gdbserver_start(const char *port_or_path) if (port > 0 && gdb_accept_tcp(gdb_fd)) { return 0; } else if (gdb_accept_socket(gdb_fd)) { - gdbserver_state.socket_path = g_strdup(port_or_path); + gdbserver_user_state.socket_path = g_strdup(port_or_path); return 0; } @@ -3289,11 +3300,11 @@ int gdbserver_start(const char *port_or_path) /* Disable gdb stub for child processes. */ void gdbserver_fork(CPUState *cpu) { - if (!gdbserver_state.init || gdbserver_state.fd < 0) { + if (!gdbserver_state.init || gdbserver_user_state.fd < 0) { return; } - close(gdbserver_state.fd); - gdbserver_state.fd = -1; + close(gdbserver_user_state.fd); + gdbserver_user_state.fd = -1; cpu_breakpoint_remove_all(cpu, BP_GDB); cpu_watchpoint_remove_all(cpu, BP_GDB); } @@ -3487,21 +3498,22 @@ int gdbserver_start(const char *device) NULL, NULL, &error_abort); monitor_init_hmp(mon_chr, false, &error_abort); } else { - qemu_chr_fe_deinit(&gdbserver_state.chr, true); - mon_chr = gdbserver_state.mon_chr; + qemu_chr_fe_deinit(&gdbserver_system_state.chr, true); + mon_chr = gdbserver_system_state.mon_chr; reset_gdbserver_state(); } create_processes(&gdbserver_state); if (chr) { - qemu_chr_fe_init(&gdbserver_state.chr, chr, &error_abort); - qemu_chr_fe_set_handlers(&gdbserver_state.chr, gdb_chr_can_receive, + qemu_chr_fe_init(&gdbserver_system_state.chr, chr, &error_abort); + qemu_chr_fe_set_handlers(&gdbserver_system_state.chr, + gdb_chr_can_receive, gdb_chr_receive, gdb_chr_event, NULL, &gdbserver_state, NULL, true); } gdbserver_state.state = chr ? RS_IDLE : RS_INACTIVE; - gdbserver_state.mon_chr = mon_chr; + gdbserver_system_state.mon_chr = mon_chr; gdbserver_state.current_syscall_cb = NULL; return 0;