From owner-freebsd-arm@freebsd.org Wed Mar 31 18:27:02 2021 Return-Path: Delivered-To: freebsd-arm@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0201C5AB937 for ; Wed, 31 Mar 2021 18:27:02 +0000 (UTC) (envelope-from rivers@dignus.com) Received: from dignus.com (adsl-065-013-223-202.sip.rdu.bellsouth.net [65.13.223.202]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "office.dignus.com", Issuer "office.dignus.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4F9ZXj2vvXz4SsY for ; Wed, 31 Mar 2021 18:26:59 +0000 (UTC) (envelope-from rivers@dignus.com) Received: from office.dignus.com (localhost [127.0.0.1]) by dignus.com (8.16.1/8.16.1) with ESMTPS id 12VIQw8G038078 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Wed, 31 Mar 2021 14:26:58 -0400 (EDT) (envelope-from rivers@office.dignus.com) X-Authentication-Warning: office.dignus.com: Host localhost [127.0.0.1] claimed to be office.dignus.com Received: (from rivers@localhost) by office.dignus.com (8.16.1/8.16.1/Submit) id 12VIQwxD038077; Wed, 31 Mar 2021 14:26:58 -0400 (EDT) (envelope-from rivers) Date: Wed, 31 Mar 2021 14:26:58 -0400 (EDT) From: Thomas David Rivers Message-Id: <202103311826.12VIQwxD038077@office.dignus.com> To: marklmi@yahoo.com, rivers@dignus.com Subject: Re: 32-bit executables on aarch64? Cc: freebsd-arm@freebsd.org In-Reply-To: <3C61C02F-3402-4C96-819D-856ED65F9CDE@yahoo.com> X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on office.dignus.com X-Rspamd-Queue-Id: 4F9ZXj2vvXz4SsY X-Spamd-Bar: +++++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of rivers@dignus.com has no SPF policy when checking 65.13.223.202) smtp.mailfrom=rivers@dignus.com X-Spamd-Result: default: False [5.40 / 15.00]; GREYLIST(0.00)[pass,meta]; HFILTER_HOSTNAME_4(2.50)[adsl-065-013-223-202.sip.rdu.bellsouth.net]; HAS_XAW(0.00)[]; TO_DN_NONE(0.00)[]; FREEMAIL_TO(0.00)[yahoo.com,dignus.com]; FROM_EQ_ENVFROM(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:7018, ipnet:65.13.220.0/22, country:US]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[65.13.223.202:from]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FREEFALL_USER(0.00)[rivers]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_SPAM_SHORT(1.00)[1.000]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[dignus.com]; AUTH_NA(1.00)[]; SPAMHAUS_ZRD(0.00)[65.13.223.202:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(1.00)[1.000]; R_SPF_NA(0.00)[no SPF record]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-arm] X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Porting FreeBSD to ARM processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Mar 2021 18:27:02 -0000 marklmi@yahoo.com wrote: > armv7# file `which uname` > /usr/bin/uname: ELF 32-bit LSB executable, ARM, EABI5 version 1 (FreeBSD), dynamically linked, interpreter /libexec/ld-elf.so.1, FreeBSD-style, for FreeBSD 14.0 (1400005), not stripped > > armv7# uname -apKU > FreeBSD RPi4B 14.0-CURRENT FreeBSD 14.0-CURRENT mm-src-n245445-def0058cc690 GENERIC-NODBG arm armv7 1400005 1400005 > > (I did both buildworld builds from the same source.) > > There is no lib32 implementation for aarch64. > So, direct execution of code for armv7 FreeBSD > without being in such a chroot is not available. > (I ignore qemu and the like here.) > > === > Mark Millard Ah! So, the kernel _can_ run a 32-bit executable... but we just can't build one on an aarch64 machine... I wonder if I can "cross-build" an LLVM/dcc for armv7 and just cross-compile to get a 32-bit executable that executes on a 64-bit kernel.. perhaps with -static to avoid any runtime problems? - Dave R. - -- rivers@dignus.com Work: (919) 676-0847 Get your mainframe programming tools at http://www.dignus.com