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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 976E3C433F5 for ; Wed, 29 Sep 2021 13:24:03 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 56A9E6128E for ; Wed, 29 Sep 2021 13:24:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 56A9E6128E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:44296 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVZZ4-0000yS-8y for qemu-devel@archiver.kernel.org; Wed, 29 Sep 2021 09:24:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39308) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVZI2-0006v8-G3 for qemu-devel@nongnu.org; Wed, 29 Sep 2021 09:06:28 -0400 Received: from mail-ot1-x334.google.com ([2607:f8b0:4864:20::334]:42646) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mVZI1-0006EN-30 for qemu-devel@nongnu.org; Wed, 29 Sep 2021 09:06:26 -0400 Received: by mail-ot1-x334.google.com with SMTP id c26-20020a056830349a00b0054d96d25c1eso2736141otu.9 for ; Wed, 29 Sep 2021 06:06:23 -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=vFT/6UTjn+SRrtv7SJvOboDTfiqpHPjXAVLEeQqZ7rU=; b=DibSKAy2R3rstnEKLGPw4vdbEtzcSfuQ5QuOOQoW45mxAzN2TwM2wB8G/tnV5y+Sg+ OrjCNTyag5UZc9mvKLmPmZwAZZLjKCKPsArdDbkfXPucFyRHrU1hdUG848KRQNYhgtX5 dSM0imBFpGBjhpPfaNtimtqi9wCTedb0Gg2cop+mITOItU0jojfEfhpmZ7Mux/SwLE/w v4/JgGJvG2P7krYvHQ9/OvcxbEj8oFfM+vldGIgA6ZgD6sDZNR61ehk2Lg/L3D79a9KM tSwtRdRew1Gk9tSVhqXmxULoGM2/QOIVwX0cmfzfytHV1IuTuM6x7vIvg/ri8QW/CDYW s8mw== 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=vFT/6UTjn+SRrtv7SJvOboDTfiqpHPjXAVLEeQqZ7rU=; b=bA0acQFFZMXxIoGKRb+fsn2vDc3nxFjnaX6ZF0P4+xKxciSZ9yqAeuhCm9qjwwHp4z 2eMV1PFauWy7QwMrkuPhqSP8CbTEGrQD5Bcj488x73tQsF0lRLSGl/XO+HF+FXPBZOop uF54pK0qe79icWvK5R8oriF4AXxAkhsZYNJhAusosK3uzn46LAuUYOMBvI5AQ/wBvnwp 8Waawm4NrRq3NP08VFsTL/teyYsgWMuZO1+MbvGQlZUQYYi8Ojqfx5Let+pgNousxCPt 1ltDOZ/N08NfAsYyWU0HSe21IrYk3PyENSY1oVPsZ/goshETRb1obb9o0PSbEbYb+SaS 0u8Q== X-Gm-Message-State: AOAM531FZlfJLM2OuKCMjDHC2ZMinFtUjFCwDeRhoqp/P0bJxlUDxnu2 uoQbutWFSxJGz2peHft1hi/EjvEXs6zinw== X-Google-Smtp-Source: ABdhPJzHnHdC/JZk8YbOt36Cwm2sNGlJ/t13aOgNLmODj8Dd5bH3sX1fyqwVYlMXaZQdCTw+RkF26Q== X-Received: by 2002:a05:6830:1497:: with SMTP id s23mr10125653otq.148.1632920782759; Wed, 29 Sep 2021 06:06:22 -0700 (PDT) Received: from localhost.localdomain ([172.58.171.248]) by smtp.gmail.com with ESMTPSA id w1sm442823ote.41.2021.09.29.06.06.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Sep 2021 06:06:22 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v5 11/26] linux-user/x86_64: Raise SIGSEGV if SA_RESTORER not set Date: Wed, 29 Sep 2021 09:05:38 -0400 Message-Id: <20210929130553.121567-12-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210929130553.121567-1-richard.henderson@linaro.org> References: <20210929130553.121567-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::334; envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x334.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: Peter Maydell , alex.bennee@linaro.org, laurent@vivier.eu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This has been a fixme for some time. The effect of returning -EFAULT from the kernel code is to raise SIGSEGV. Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- linux-user/i386/signal.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c index b38b5f108e..433efa3d69 100644 --- a/linux-user/i386/signal.c +++ b/linux-user/i386/signal.c @@ -421,19 +421,18 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Set up to return from userspace. If provided, use a stub already in userspace. */ -#ifndef TARGET_X86_64 if (ka->sa_flags & TARGET_SA_RESTORER) { __put_user(ka->sa_restorer, &frame->pretcode); } else { +#ifdef TARGET_X86_64 + /* For x86_64, SA_RESTORER is required ABI. */ + goto give_sigsegv; +#else /* This is no longer used, but is retained for ABI compatibility. */ install_rt_sigtramp(frame->retcode); __put_user(default_rt_sigreturn, &frame->pretcode); - } -#else - /* XXX: Would be slightly better to return -EFAULT here if test fails - assert(ka->sa_flags & TARGET_SA_RESTORER); */ - __put_user(ka->sa_restorer, &frame->pretcode); #endif + } /* Set up registers for signal handler */ env->regs[R_ESP] = frame_addr; -- 2.25.1