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[172.254.253.57]) by smtp.gmail.com with ESMTPSA id f7sm681365qkp.107.2021.11.02.20.40.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Nov 2021 20:40:39 -0700 (PDT) Subject: Re: [PATCH v2 24/30] bsd-user/arm/target_arch_signal.h: arm set_mcontext To: Warner Losh , qemu-devel@nongnu.org References: <20211102225248.52999-1-imp@bsdimp.com> <20211102225248.52999-25-imp@bsdimp.com> From: Richard Henderson Message-ID: Date: Tue, 2 Nov 2021 23:40:38 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20211102225248.52999-25-imp@bsdimp.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::f36; envelope-from=richard.henderson@linaro.org; helo=mail-qv1-xf36.google.com X-Spam_score_int: -45 X-Spam_score: -4.6 X-Spam_bar: ---- X-Spam_report: (-4.6 / 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, NICE_REPLY_A=-2.549, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stacey Son , qemu-trivial@nongnu.org, Kyle Evans , Michael Tokarev , Philippe Mathieu-Daude , Laurent Vivier Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 11/2/21 6:52 PM, Warner Losh wrote: > + env->regs[15] = tswap32(gr[TARGET_REG_PC]); This will be able to crash qemu with an odd pc in thumb mode. You'd have to artificially create this mcontext of course. Otherwise, Reviewed-by: Richard Henderson r~