From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 5D7F9C77B6F for ; Tue, 11 Apr 2023 17:14:06 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pmHWN-00043O-AE; Tue, 11 Apr 2023 13:11:07 -0400 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 1pmHW3-0003t0-8R for qemu-devel@nongnu.org; Tue, 11 Apr 2023 13:10:47 -0400 Received: from mail-io1-xd2c.google.com ([2607:f8b0:4864:20::d2c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pmHVx-0006AH-Ku for qemu-devel@nongnu.org; Tue, 11 Apr 2023 13:10:46 -0400 Received: by mail-io1-xd2c.google.com with SMTP id bh15so14127959iob.9 for ; Tue, 11 Apr 2023 10:10:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20210112.gappssmtp.com; s=20210112; t=1681233039; 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=j6xfwtkUnMMc9RuZ0yputW7S+NamT6FMav/Lxfc/8zI=; b=z8mqc1eslUcJUL57ZREmXFvPow6rPM8SoM59ItEKXxQ8UaepEGkq89giOgs5os0rtB yf6nIR+MaOIKuKwBYLhP6hTZHGHBi7eFlQKptgHvej8qAeV9etblW5wFuuJ1OVpUVjA+ TNcZm73acPMjkc6i6Q6Ig1QQTZRPV2Myn02Tv3kpzmafqFbPUWzSyNQmvJ4E8Gvgv1Bf r/1x0ePNM425JOl25GdWuyfkyBIdsyZ7Hg8niypgRikzWWKpuaNTeVaNACfPBTqO9EA/ ZkKXqAvjvTSfTqK0cQOxXsR6O/S15ZZaek1XS1qO6Ioeg2WIXiQVrat7IEhW8QtMkO3X yllA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1681233039; 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=j6xfwtkUnMMc9RuZ0yputW7S+NamT6FMav/Lxfc/8zI=; b=NMFs5odrSzsV7ipkFSsc2cJQdYVrs7e4JccIH+FizBqVv/b1HytfTXh2lAX+aUMGkp gJudjvdR6SdQvf9OPLn9tMNaqAMN6gToceJw8pIhMLw6uB9laHVHVOr2RK+O5iezc1jN 0CVrVBITw4lmXRYZU4D5w6ZddoDEhmaVqFNPk39f+cyHMTaNCTct8bzuM1guqjWj3zbH T0KBEDLtJw1Sm0UYID8OeJJnaqXF7jYGPW5coC4/Idi9hLI53V6KzmCQk5Keol0nM19u mnCQZSGpcK8mbkeQ2c8zYJH3G0URAEzwqCpfpnhwpTgQz8NPLN7OUv2AktvL2Tpa+jGE uqcw== X-Gm-Message-State: AAQBX9euNcMgqOPL2+P/1FqinP0XeNSN70X1LsNOMEqXx8D3rzCl49x+ T0gH0HipK8N06uKwNW5Vpc9oplb47PEmNvnj7Q8= X-Google-Smtp-Source: AKy350YBPRjYM+lt4bDFzrGZqMFCgtu0peNDpykTgU+TsVZD6DrQgaJpBl+by+bxOhuLEx7jdqRWmg== X-Received: by 2002:a5d:8455:0:b0:760:2130:fc8e with SMTP id w21-20020a5d8455000000b007602130fc8emr11046453ior.21.1681233038731; Tue, 11 Apr 2023 10:10:38 -0700 (PDT) Received: from dune.bsdimp.com (c-71-237-47-177.hsd1.co.comcast.net. [71.237.47.177]) by smtp.gmail.com with ESMTPSA id d36-20020a0285a7000000b0040b11b7ef54sm4140942jai.39.2023.04.11.10.10.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Apr 2023 10:10:38 -0700 (PDT) From: Warner Losh To: qemu-devel@nongnu.org Cc: ryoon@netbsd.org, kevans@freebsd.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Thomas Huth , riastradh@netbsd.org, brad@comstyle.com, reinoud@netbsd.org, jrtc27@jrtc27.com, =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , Warner Losh , Richard Henderson Subject: [PATCH v3 16/20] bsd-user: Implement SIGSYS on arm Date: Tue, 11 Apr 2023 11:09:51 -0600 Message-Id: <20230411170955.17358-17-imp@bsdimp.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230411170955.17358-1-imp@bsdimp.com> References: <20230411170955.17358-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: none client-ip=2607:f8b0:4864:20::d2c; envelope-from=imp@bsdimp.com; helo=mail-io1-xd2c.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When a system call returns ENOSYS, send a SIGSYS to the process (to generate a core dump). Signed-off-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/arm/target_arch_cpu.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h index 517d0087644..c4b21fef713 100644 --- a/bsd-user/arm/target_arch_cpu.h +++ b/bsd-user/arm/target_arch_cpu.h @@ -127,6 +127,14 @@ static inline void target_cpu_loop(CPUARMState *env) env->regs[15] -= env->thumb ? 2 : 4; break; } + /* + * Emulate BSD's sigsys behavior on unimplemented system calls. + * XXX may need to gate this somehow or arrange for sigsys to be + * masked in some use cases. + */ + if (ret == -TARGET_ENOSYS) { + force_sig_fault(TARGET_SIGSYS, SI_KERNEL, env->regs[15]); + } if ((unsigned int)ret >= (unsigned int)(-515)) { ret = -ret; cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr); -- 2.40.0