From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#44531: 27.1; Emacs 27 fails to build from source on m68k (regression) Date: Tue, 16 Aug 2022 17:38:25 -0400 Message-ID: References: Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11596"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: 44531@debbugs.gnu.org, Daniel Colascione , John Paul Adrian Glaubitz To: Pip Cet Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Tue Aug 16 23:39:29 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oO4HZ-0002qg-9n for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 16 Aug 2022 23:39:29 +0200 Original-Received: from localhost ([::1]:47636 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oO4HY-0001y8-1j for geb-bug-gnu-emacs@m.gmane-mx.org; Tue, 16 Aug 2022 17:39:28 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53184) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oO4H9-0001xi-Oj for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 17:39:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:58782) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1oO4H8-00012C-At for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 17:39:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1oO4H8-0002Fi-26 for bug-gnu-emacs@gnu.org; Tue, 16 Aug 2022 17:39:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 16 Aug 2022 21:39:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44531 X-GNU-PR-Package: emacs Original-Received: via spool by 44531-submit@debbugs.gnu.org id=B44531.16606859308641 (code B ref 44531); Tue, 16 Aug 2022 21:39:02 +0000 Original-Received: (at 44531) by debbugs.gnu.org; 16 Aug 2022 21:38:50 +0000 Original-Received: from localhost ([127.0.0.1]:48531 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oO4Gv-0002FJ-VP for submit@debbugs.gnu.org; Tue, 16 Aug 2022 17:38:50 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:31128) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1oO4Gg-0002Er-CR for 44531@debbugs.gnu.org; Tue, 16 Aug 2022 17:38:48 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 2D6F1100138; Tue, 16 Aug 2022 17:38:28 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id AF8761000ED; Tue, 16 Aug 2022 17:38:26 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1660685906; bh=6NFr2axQXohfhhDOk0g0FI4zu2VdpIPX3Jcb2oFzG6g=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=WW1Cwd1lHdDiia7x+trFxAidZzwEnGX8G2k8ODwXZTO1EK2UWmLRLUBVEsI0Tq3J7 z/xnB3Qp+BUlVucA0Ai4fT6EIoOuwXisU/rHq6qk57OtGsEEpqgbecuJTycWMLaJsK TAwr7/ny9s0UJc14/pkvx5ER3y/ncq73vEIf2dEy+IiRQ7UkJ2HJgP9y+NxDETnvMO unMzxhnwxyhJHBGy4+1pmwoI1k7O6+SUCjKEqe/BRu8xQc9TdM3KH0lfslmkHA1pbm +tfF4DIgBPGDVmLNeUfxZ/4cblMtoME3xcgRxV4UffHCrCnvBIsvnN9eZoBDmV4eG3 xL666OfLWZydQ== Original-Received: from alfajor (unknown [45.44.229.252]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 9014A120163; Tue, 16 Aug 2022 17:38:26 -0400 (EDT) In-Reply-To: (Pip Cet's message of "Sat, 23 Jul 2022 14:42:58 +0000") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:240012 Archived-At: >> [...] >> DUMP_RELOC_ALIGNMENT_BITS = 2, >> >> /* Minimum alignment required by dump file format. */ >> DUMP_RELOCATION_ALIGNMENT = 1 << DUMP_RELOC_ALIGNMENT_BITS, >> [...] >> >> I can't see anything in the code which explains what this alignment >> requirement is about. You can try lowering DUMP_RELOC_ALIGNMENT_BITS >> to 1 and see if that works (long shot). > > IIUC, the top (DUMP_RELOC_TYPE_BITS - DUMP_RELOC_ALIGNMENT_BITS) of > the relocation offsets stored by pdumper must be 0. That means we can > only address the first 512 MB of the dump in ordinary 32-bit pdumper > builds, and 256 MB on m68k with your fix. I'm not sure how useful a > data point this is without real silicon, but I tried on an m68k > emulator (qemu), could reproduce the bug, and your fix works there. Any hope you can turn that into a patch? Maybe with something like `#ifdef (__m68k__)`? Stefan