From owner-freebsd-bugs@freebsd.org Tue Jun 16 20:25:47 2020 Return-Path: Delivered-To: freebsd-bugs@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 7410F332C4F for ; Tue, 16 Jun 2020 20:25:47 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 49mfpg2WdLz4f4n for ; Tue, 16 Jun 2020 20:25:47 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 5674D333015; Tue, 16 Jun 2020 20:25:47 +0000 (UTC) Delivered-To: bugs@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 563E2332F1C for ; Tue, 16 Jun 2020 20:25:47 +0000 (UTC) (envelope-from bugzilla-noreply@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 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 49mfpg1gldz4djq for ; Tue, 16 Jun 2020 20:25:47 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 34E7B14DBC for ; Tue, 16 Jun 2020 20:25:47 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 05GKPk5x079562 for ; Tue, 16 Jun 2020 20:25:46 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 05GKPkKR079561 for bugs@FreeBSD.org; Tue, 16 Jun 2020 20:25:46 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 247327] i386 linuxulator doesn't support more than one LDT Date: Tue, 16 Jun 2020 20:25:46 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: trasz@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jun 2020 20:25:47 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D247327 Bug ID: 247327 Summary: i386 linuxulator doesn't support more than one LDT Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: trasz@FreeBSD.org Alex S reported that Proton (which is Wine distribution integrated with Ste= am) depends on functionality mentioned at https://github.com/freebsd/freebsd/blob/8989bc4581101acb0dda31d9c4f9b6ec473= 2c5cf/sys/i386/linux/linux_machdep.c#L582: /* * Semantics of Linux version: every thread in the system has array of * 3 tls descriptors. 1st is GLIBC TLS, 2nd is WINE, 3rd unknown. This * syscall loads one of the selected tls decriptors with a value and * also loads GDT descriptors 6, 7 and 8 with the content of the * per-thread descriptors. * * Semantics of FreeBSD version: I think we can ignore that Linux has 3 * per-thread descriptors and use just the 1st one. The tls_array[] * is used only in set/get-thread_area() syscalls and for loading the * GDT descriptors. In FreeBSD we use just one GDT descriptor for TLS * so we will load just one. * * XXX: this doesn't work when a user space process tries to use more * than 1 TLS segment. Comment in the Linux sources says wine might do * this. */ --=20 You are receiving this mail because: You are the assignee for the bug.=