From nobody Tue Feb 10 19:49:16 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1634272849608689.574189344725; Thu, 14 Oct 2021 21:40:49 -0700 (PDT) Received: from localhost ([::1]:60896 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mbF1U-0003Jo-HU for importer@patchew.org; Fri, 15 Oct 2021 00:40:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39448) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mbEc5-0006Yt-N7 for qemu-devel@nongnu.org; Fri, 15 Oct 2021 00:14:33 -0400 Received: from mail-pl1-x635.google.com ([2607:f8b0:4864:20::635]:44017) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mbEc4-0002mo-5K for qemu-devel@nongnu.org; Fri, 15 Oct 2021 00:14:33 -0400 Received: by mail-pl1-x635.google.com with SMTP id y1so5590553plk.10 for ; Thu, 14 Oct 2021 21:14:31 -0700 (PDT) Received: from localhost.localdomain ([71.212.134.125]) by smtp.gmail.com with ESMTPSA id q8sm10236885pja.52.2021.10.14.21.14.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Oct 2021 21:14:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=67r73sMxmFAFlBR0ViNOs8odKIpwZUQrX4e2focSvME=; b=PDYhmQPC1wqr9JTz7mYBYfET4px6+8klt9olHF+41DAhgt7tLeUyyWOPba8RW7b4RB EIX89Lkfo+jZVUwe92XAnA6Mjesxyna20E1NBcWbTP9TSe4y7nuo6Zk7jGLE9mDPzwYO yj3SklMZb5O7RmFl1F0RhIoB+C0iXMwjviHr/zb68/7MkJco473o6iNCIaGkAGNl4I5a BoXhJvQ2frhpm9HuOdDEmle8fOqEyDqLP0LH3URDlxELuvd6L7nS7hUpvIxX4qZ+NxjS MLgRcCYAKHhVo+ggGmEEmMrkmI0b1vjtZOkQPU+MOLCsZbvqygDx1QzY/NiQ9A/cVf3t /M6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=67r73sMxmFAFlBR0ViNOs8odKIpwZUQrX4e2focSvME=; b=Z/p1ewz3L24+b3gHBaSVMt/WW5mNiTSPeRNLnYdCK9j0LaO7Z6DVGfMQfMfc1Z+XZM DSvehxNxxtC+oBuHIvdBKsjT54+CB58vw1QKAJc/fdbFyYXVBpPMD5vbwc7+VROX8V7M zG3s5otOVTS27+Ymf+U8vn/8eBYGOjczVjrRJOdEOBV0hzMOEP7uWVA4DXVR52nUBLPa XdKV4kHTFS98F7DuEvSPoepjv0vWJ+3NXcw3k9zDeWpdhIAj9aqB85o7y69x/dWRvvEP ibk9bYsRPmHvZ1dFGEFaPh++h0c5FAXwxagsQieVsBvRIy2EddLwnz4kQuH0/+0fAovj jhWg== X-Gm-Message-State: AOAM530e4oXeNb4HREwQFqPxyJU6R+Q/dFK9JY+rjBO23m2Sk4/AjIr5 2kEqbGLMLjgnkldN2lM7yT4feajoZVVTfA== X-Google-Smtp-Source: ABdhPJzAM28XGjKxjkrghZfO9fcaPZ0uo2Es0pMWNrKCArcREgjLDe7nnQbboVtLalwFaxCWSLOiPw== X-Received: by 2002:a17:90a:e7c8:: with SMTP id kb8mr10707601pjb.95.1634271270863; Thu, 14 Oct 2021 21:14:30 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v5 44/67] linux-user: Add cpu_loop_exit_sigbus Date: Thu, 14 Oct 2021 21:10:30 -0700 Message-Id: <20211015041053.2769193-45-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211015041053.2769193-1-richard.henderson@linaro.org> References: <20211015041053.2769193-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::635; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x635.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=ham autolearn_force=no X-Spam_action: no action 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: alex.bennee@linaro.org, laurent@vivier.eu, imp@bsdimp.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1634272851271100001 Content-Type: text/plain; charset="utf-8" This is a new interface to be provided by the os emulator for raising SIGBUS on fault. Use the new record_sigbus target hook. Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Warner Losh --- include/exec/exec-all.h | 14 ++++++++++++++ linux-user/signal.c | 14 ++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index f74578500c..6bb2a0f7ec 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -700,6 +700,20 @@ void QEMU_NORETURN cpu_loop_exit_sigsegv(CPUState *cpu= , target_ulong addr, MMUAccessType access_type, bool maperr, uintptr_t ra); =20 +/** + * cpu_loop_exit_sigbus: + * @cpu: the cpu context + * @addr: the guest address of the alignment fault + * @access_type: access was read/write/execute + * @ra: host pc for unwinding + * + * Use the TCGCPUOps hook to record cpu state, do guest operating system + * specific things to raise SIGBUS, and jump to the main cpu loop. + */ +void QEMU_NORETURN cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr, + MMUAccessType access_type, + uintptr_t ra); + #else static inline void mmap_lock(void) {} static inline void mmap_unlock(void) {} diff --git a/linux-user/signal.c b/linux-user/signal.c index 9d60abc038..df2c8678d0 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -706,6 +706,20 @@ void cpu_loop_exit_sigsegv(CPUState *cpu, target_ulong= addr, cpu_loop_exit_restore(cpu, ra); } =20 +void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr, + MMUAccessType access_type, uintptr_t ra) +{ + const struct TCGCPUOps *tcg_ops =3D CPU_GET_CLASS(cpu)->tcg_ops; + + if (tcg_ops->record_sigbus) { + tcg_ops->record_sigbus(cpu, addr, access_type, ra); + } + + force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, addr); + cpu->exception_index =3D EXCP_INTERRUPT; + cpu_loop_exit_restore(cpu, ra); +} + /* abort execution with signal */ static void QEMU_NORETURN dump_core_and_abort(int target_sig) { --=20 2.25.1