From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id idZdIKkkpGAfIwAAWB0awg (envelope-from ) for ; Tue, 18 May 2021 16:33:45 -0400 Received: by simark.ca (Postfix, from userid 112) id 6FF521F11C; Tue, 18 May 2021 16:33:45 -0400 (EDT) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 94C001E813 for ; Tue, 18 May 2021 16:33:44 -0400 (EDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 296673857C63; Tue, 18 May 2021 20:33:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 296673857C63 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1621370024; bh=kEWJ37KZYZeeOIbNaEKG/I8DnKHBqwpmPgVrT0cf0qA=; h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=yCxsPnkCef5YP/RPIlHMBxh8FmZ17rHywxyATHcnw7x39Yq3iyPdZ5hA/1tPnbpmJ DiS5ItC44t5EQp66g2nJNHogydA5gRV4TGujRGt3elXqMX9ppjdeK78RH8B8ryjOgy dtrGU7vS0U/7a4+tOqvfH1rOge3iJJ67vcxjkE/A= Received: from smtp.polymtl.ca (smtp.polymtl.ca [132.207.4.11]) by sourceware.org (Postfix) with ESMTPS id 213353857C63 for ; Tue, 18 May 2021 20:33:42 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 213353857C63 Received: from simark.ca (simark.ca [158.69.221.121]) (authenticated bits=0) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id 14IKXZPY002364 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 18 May 2021 16:33:40 -0400 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp.polymtl.ca 14IKXZPY002364 Received: from [10.0.0.11] (192-222-157-6.qc.cable.ebox.net [192.222.157.6]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPSA id 98F5F1E813; Tue, 18 May 2021 16:33:35 -0400 (EDT) Subject: Re: [PATCH] [AArch64] Sanitize the address before working with allocation tags To: Luis Machado , gdb-patches@sourceware.org References: <20210518201953.3491983-1-luis.machado@linaro.org> Message-ID: Date: Tue, 18 May 2021 16:33:35 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: <20210518201953.3491983-1-luis.machado@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Poly-FromMTA: (simark.ca [158.69.221.121]) at Tue, 18 May 2021 20:33:35 +0000 X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Simon Marchi via Gdb-patches Reply-To: Simon Marchi Errors-To: gdb-patches-bounces@sourceware.org Sender: "Gdb-patches" On 2021-05-18 4:19 p.m., Luis Machado via Gdb-patches wrote: > Remove the logical tag/top byte from the address whenever we have to work with > allocation tags. Can you explain a bit more why this is needed? What down the line doesn't like to receive an address with a logical tag? Simon