From owner-svn-src-all@freebsd.org Tue Sep 3 19:48:24 2019 Return-Path: Delivered-To: svn-src-all@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 71E9FD5773; Tue, 3 Sep 2019 19:48:24 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46NHZ01tPVz4Fx1; Tue, 3 Sep 2019 19:48:24 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 23CB08025; Tue, 3 Sep 2019 19:48:24 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x83JmOQU070152; Tue, 3 Sep 2019 19:48:24 GMT (envelope-from trasz@FreeBSD.org) Received: (from trasz@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x83JmOKl070151; Tue, 3 Sep 2019 19:48:24 GMT (envelope-from trasz@FreeBSD.org) Message-Id: <201909031948.x83JmOKl070151@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: trasz set sender to trasz@FreeBSD.org using -f From: Edward Tomasz Napierala Date: Tue, 3 Sep 2019 19:48:24 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r351783 - head/sys/amd64/linux X-SVN-Group: head X-SVN-Commit-Author: trasz X-SVN-Commit-Paths: head/sys/amd64/linux X-SVN-Commit-Revision: 351783 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Sep 2019 19:48:24 -0000 Author: trasz Date: Tue Sep 3 19:48:23 2019 New Revision: 351783 URL: https://svnweb.freebsd.org/changeset/base/351783 Log: Unbreak Linux binaries linked against new glibc, such as the ones from recent Ubuntu versions. Without it they segfault on startup. Reviewed by: emaste MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D20687 Modified: head/sys/amd64/linux/linux_sysvec.c Modified: head/sys/amd64/linux/linux_sysvec.c ============================================================================== --- head/sys/amd64/linux/linux_sysvec.c Tue Sep 3 19:48:02 2019 (r351782) +++ head/sys/amd64/linux/linux_sysvec.c Tue Sep 3 19:48:23 2019 (r351783) @@ -343,6 +343,12 @@ linux_copyout_strings(struct image_params *imgp) */ vectp -= imgp->args->argc + 1 + imgp->args->envc + 1; + /* + * Starting with 2.24, glibc depends on a 16-byte stack alignment. + * One "long argc" will be prepended later. + */ + vectp = (char **)((((uintptr_t)vectp + 8) & ~0xF) - 8); + /* vectp also becomes our initial stack base. */ stack_base = (register_t *)vectp;