From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL autolearn=ham autolearn_force=no version=3.4.2 Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by inbox.vuxu.org (OpenSMTPD) with SMTP id f7b09ac2 for ; Sun, 19 Jan 2020 14:46:29 +0000 (UTC) Received: (qmail 6099 invoked by uid 550); 19 Jan 2020 14:46:27 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Reply-To: musl@lists.openwall.com Received: (qmail 6079 invoked from network); 19 Jan 2020 14:46:27 -0000 Date: Sun, 19 Jan 2020 17:46:15 +0300 (MSK) From: Alexander Monakov To: musl@lists.openwall.com In-Reply-To: <8299f261-7870-57a6-37cf-d4ce482ad81e@openwall.com> Message-ID: References: <20200119110743.GD2020@voyager> <20200119113134.GJ23985@port70.net> <8299f261-7870-57a6-37cf-d4ce482ad81e@openwall.com> User-Agent: Alpine 2.20.13 (LNX 116 2015-12-14) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Subject: Re: [musl] Minor style patch to exit.c On Sun, 19 Jan 2020, Alexander Cherepanov wrote: > Couldn't _start defined as an array? Then separate values could be accessed > simply as elements of this array. And casts to integers could be limited to > calculating the number of elements, the terminating value or something. Yeah, I think usually such linker-provided symbols are declared as extern arrays. I'm surprised that isn't the case in musl. I don't think declaring them as arrays helps with making casts pedantically suitable for calculating number of elements though - as you said, any bijection between intptr_t and pointers would be a valid implementation of a cast, you're not guaranteed that (intptr_t)&a[i] == (intptr_t)a + i * sizeof *a. Alexander