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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id j5-20020a654d45000000b003c14af50621sm3248047pgt.57.2022.04.28.10.09.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Apr 2022 10:09:05 -0700 (PDT) Date: Thu, 28 Apr 2022 10:09:04 -0700 From: Kees Cook To: Catalin Marinas Cc: Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jonathan Corbet , Eric Biederman , Luis Machado , Richard Earnshaw Subject: Re: [PATCH] elf: Fix the arm64 MTE ELF segment name and value Message-ID: <202204281009.57198AEC9@keescook> References: <20220425151833.2603830-1-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220425151833.2603830-1-catalin.marinas@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220428_100908_118347_74253B15 X-CRM114-Status: GOOD ( 13.16 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Apr 25, 2022 at 04:18:33PM +0100, Catalin Marinas wrote: > Unfortunately, the name/value choice for the MTE ELF segment type > (PT_ARM_MEMTAG_MTE) was pretty poor: LOPROC+1 is already in use by > PT_AARCH64_UNWIND, as defined in the AArch64 ELF ABI > (https://github.com/ARM-software/abi-aa/blob/main/aaelf64/aaelf64.rst). > > Update the ELF segment type value to LOPROC+2 and also change the define > to PT_AARCH64_MEMTAG_MTE to match the AArch64 ELF ABI namespace. The > AArch64 ELF ABI document is updating accordingly (segment type not > previously mentioned in the document). > > Signed-off-by: Catalin Marinas Reviewed-by: Kees Cook -- Kees Cook _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel