From patchwork Tue Feb 4 17:10:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 1233495 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: 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: ozlabs.org; dmarc=none (p=none dis=none) header.from=vivier.eu 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 ozlabs.org (Postfix) with ESMTPS id 48Bs8T4WwyzB3xP for ; Wed, 5 Feb 2020 04:27:37 +1100 (AEDT) Received: from localhost ([::1]:35042 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iz1z5-0002jj-EN for incoming@patchwork.ozlabs.org; Tue, 04 Feb 2020 12:27:35 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:54888) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iz1jf-00078Y-FR for qemu-devel@nongnu.org; Tue, 04 Feb 2020 12:11:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iz1je-0001aL-9J for qemu-devel@nongnu.org; Tue, 04 Feb 2020 12:11:39 -0500 Received: from mout.kundenserver.de ([212.227.126.130]:37669) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iz1jd-0001VE-Vp for qemu-devel@nongnu.org; Tue, 04 Feb 2020 12:11:38 -0500 Received: from localhost.localdomain ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue009 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MbAYi-1jVtZL1IHg-00bdxB; Tue, 04 Feb 2020 18:11:07 +0100 From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PATCH v2 2/4] linux-user: cleanup signal.c Date: Tue, 4 Feb 2020 18:10:51 +0100 Message-Id: <20200204171053.1718013-3-laurent@vivier.eu> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200204171053.1718013-1-laurent@vivier.eu> References: <20200204171053.1718013-1-laurent@vivier.eu> MIME-Version: 1.0 X-Provags-ID: V03:K1:EIm9a7+YzWA3RVuwlOMtseaQqYUyH2rlaronjAq9JvijJ1zS0yS 8kHGZY0eectH8FzOeo0O4if6eeeY8cXebK4aJQ8yx6LXnBGIk8xgJ2J4fkb+Zz4KBM4+H4+ KVsdYdlciyJhWRVZR1VM3jOAC6ZvzvRoSOn4fc5kiyqif+v6Q3CGGPlrGFT63jTUrMNge7P zlg7IkIchuu3l0vkxYJ4w== X-UI-Out-Filterresults: notjunk:1; V03:K0:LzrnhUWiL+k=:dAjJzbjW3JWg0JyGqsCeBN 3NIMm08WHB9KoJL/DcsWZltc6A5bmTOqt+ttgr2rosYEu2kKA5uH4vbirRMmmCT0TNdu3ec18 zUAy0W2+OPg+QWprGmVrb3kCi6XWT35SNJAsVKzeFDG0shD4d+qsouFg6E9uXGn3joA7nTSGq IalWl8XmTj0NrmTTJGviz4b4U9Rw52zeSrQ3vZS1/9/+RdBpMxNyg2i4JQBPkQhBrGSCojA8y VBUcahRDMDryTdXIrCd7LWxsjSTs9rwRLXmvEmDCndlzx9stImIdST5fe2dlnuGI74t4rCsaV mT1Day3DAgyHF92d3k904uyM6QXAjtvpoI4KprKNBp+6ASwJQ+FlW6b33S5Li6LG/XuTuxmMs 6T4+jCVL2wexGoWRZH+WZDbhD/A3MOq5xDwSnM+qhUtcAHbmjEA8BFPc3xv2AtI5BOO1CJ3+r 3hLYKgrmdURfKt72SDUHcgm2lVtYE0yFSjpPIKeLcy+3RB+7HFg74sc+/yH4oyQGhQfYeYrAx qxRpxJXqorHQMA2oe9n/61pqcY9asNgnFxw6h9z8i6pML14oQsxd54CuG1iCxCSRfz6LmgzTD GdVFRZ48032kWrMc4ThhMsR63Uk2rO7Pxn66OLQtB5D1TiKezJIQ6c4P4iyHYwTG+/kQG9m9S YMPXh0+EcHyYoTxtkFprRQvnZV6Us0bfQ3kf3DdujtV4pnKwxXHMFv+kpEfyRmRwZbIUn/UTQ BIV4/ja2ZSn2TpHQUmzuF82nnMu3rQa8tQBasJGWJomyfifGxWvptExNFLGT+MlQZsMCYPIhz Aqyulin0zsdGMElBc2RQShyIgxt7pMlkwEWKirT0GvxbqmLXx8dAidXy2ZRH12xfE1N23kg X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.126.130 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: , Cc: Peter Maydell , Marlies Ruck , Riku Voipio , Laurent Vivier , Aleksandar Markovic , Josh Kunz , Taylor Simpson , Matus Kysel , milos.stojanovic@rt-rk.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" No functional changes. Prepare the field for future fixes. Remove memset(.., 0, ...) that is useless on a static array Signed-off-by: Laurent Vivier Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Peter Maydell --- Notes: v2: replace i, j by target_sig, host_sig linux-user/signal.c | 48 ++++++++++++++++++++++++++------------------- 1 file changed, 28 insertions(+), 20 deletions(-) diff --git a/linux-user/signal.c b/linux-user/signal.c index 5ca6d62b15d3..246315571c09 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -66,12 +66,6 @@ static uint8_t host_to_target_signal_table[_NSIG] = { [SIGPWR] = TARGET_SIGPWR, [SIGSYS] = TARGET_SIGSYS, /* next signals stay the same */ - /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with - host libpthread signals. This assumes no one actually uses SIGRTMAX :-/ - To fix this properly we need to do manual signal delivery multiplexed - over a single host signal. */ - [__SIGRTMIN] = __SIGRTMAX, - [__SIGRTMAX] = __SIGRTMIN, }; static uint8_t target_to_host_signal_table[_NSIG]; @@ -480,31 +474,45 @@ static int core_dump_signal(int sig) } } +static void signal_table_init(void) +{ + int host_sig, target_sig; + + /* + * Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with + * host libpthread signals. This assumes no one actually uses SIGRTMAX :-/ + * To fix this properly we need to do manual signal delivery multiplexed + * over a single host signal. + */ + host_to_target_signal_table[__SIGRTMIN] = __SIGRTMAX; + host_to_target_signal_table[__SIGRTMAX] = __SIGRTMIN; + + /* generate signal conversion tables */ + for (host_sig = 1; host_sig < _NSIG; host_sig++) { + if (host_to_target_signal_table[host_sig] == 0) { + host_to_target_signal_table[host_sig] = host_sig; + } + } + for (host_sig = 1; host_sig < _NSIG; host_sig++) { + target_sig = host_to_target_signal_table[host_sig]; + target_to_host_signal_table[target_sig] = host_sig; + } +} + void signal_init(void) { TaskState *ts = (TaskState *)thread_cpu->opaque; struct sigaction act; struct sigaction oact; - int i, j; + int i; int host_sig; - /* generate signal conversion tables */ - for(i = 1; i < _NSIG; i++) { - if (host_to_target_signal_table[i] == 0) - host_to_target_signal_table[i] = i; - } - for(i = 1; i < _NSIG; i++) { - j = host_to_target_signal_table[i]; - target_to_host_signal_table[j] = i; - } + /* initialize signal conversion tables */ + signal_table_init(); /* Set the signal mask from the host mask. */ sigprocmask(0, 0, &ts->signal_mask); - /* set all host signal handlers. ALL signals are blocked during - the handlers to serialize them. */ - memset(sigact_table, 0, sizeof(sigact_table)); - sigfillset(&act.sa_mask); act.sa_flags = SA_SIGINFO; act.sa_sigaction = host_signal_handler;