From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dedi548.your-server.de (dedi548.your-server.de [85.10.215.148]) by sourceware.org (Postfix) with ESMTPS id 3548A3858C52 for ; Wed, 20 Jul 2022 11:48:54 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 3548A3858C52 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=embedded-brains.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=embedded-brains.de Received: from sslproxy05.your-server.de ([78.46.172.2]) by dedi548.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oE8CB-000Lib-4H; Wed, 20 Jul 2022 13:48:51 +0200 Received: from [82.100.198.138] (helo=mail.embedded-brains.de) by sslproxy05.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oE8CB-000CSY-AO; Wed, 20 Jul 2022 13:48:51 +0200 Received: from localhost (localhost [127.0.0.1]) by mail.embedded-brains.de (Postfix) with ESMTP id 04EA4480053; Wed, 20 Jul 2022 13:48:51 +0200 (CEST) Received: from mail.embedded-brains.de ([127.0.0.1]) by localhost (zimbra.eb.localhost [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id yYWSaWMuN0ak; Wed, 20 Jul 2022 13:48:50 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.embedded-brains.de (Postfix) with ESMTP id A61BA48006B; Wed, 20 Jul 2022 13:48:50 +0200 (CEST) X-Virus-Scanned: amavisd-new at zimbra.eb.localhost Received: from mail.embedded-brains.de ([127.0.0.1]) by localhost (zimbra.eb.localhost [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id oB3t6Txrz-Ic; Wed, 20 Jul 2022 13:48:50 +0200 (CEST) Received: from [10.10.171.6] (unknown [10.10.171.6]) by mail.embedded-brains.de (Postfix) with ESMTPSA id 79342480053; Wed, 20 Jul 2022 13:48:50 +0200 (CEST) Message-ID: Date: Wed, 20 Jul 2022 13:48:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: Use -ftls-model=local-exec for RTEMS by default? Content-Language: en-US To: Alexander Monakov Cc: GCC Development References: From: Sebastian Huber In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Authenticated-Sender: smtp-embedded@poldinet.de X-Virus-Scanned: Clear (ClamAV 0.103.6/26607/Wed Jul 20 10:04:34 2022) X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, NICE_REPLY_A, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Jul 2022 11:48:55 -0000 On 20/07/2022 13:41, Alexander Monakov wrote: > On Wed, 20 Jul 2022, Sebastian Huber wrote: >=20 >> How does Ada get its default TLS model? > You shouldn't need to do anything special, GCC automatically selects > initial-exec or local-exec for non-PIC (including PIE). I am not sure, for this test program: extern _Thread_local int i; _Thread_local int j; int f(void) { return i + j; } I get: powerpc-rtems6-gcc -S -O2 -o - tls.c .file "tls.c" .machine ppc .section ".text" .align 2 .globl f .type f, @function f: .LFB0: .cfi_startproc lis 9,_GLOBAL_OFFSET_TABLE_@ha addis 10,2,j@tprel@ha la 9,_GLOBAL_OFFSET_TABLE_@l(9) addi 10,10,j@tprel@l lwz 9,i@got@tprel(9) lwz 10,0(10) add 9,9,i@tls lwz 3,0(9) add 3,3,10 blr .cfi_endproc .LFE0: .size f,.-f .globl j .section .tbss,"awT",@nobits .align 2 .type j, @object .size j, 4 j: .zero 4 .ident "GCC: (GNU) 12.1.1 20220711 [master 5efa23f3389]" .section .note.GNU-stack,"",@progbits and: powerpc-rtems6-gcc -S -O2 -o - tls.c -ftls-model=3Dlocal-exec .file "tls.c" .machine ppc .section ".text" .align 2 .globl f .type f, @function f: .LFB0: .cfi_startproc addis 10,2,i@tprel@ha addis 9,2,j@tprel@ha addi 10,10,i@tprel@l addi 9,9,j@tprel@l lwz 3,0(10) lwz 9,0(9) add 3,3,9 blr .cfi_endproc .LFE0: .size f,.-f .globl j .section .tbss,"awT",@nobits .align 2 .type j, @object .size j, 4 j: .zero 4 .ident "GCC: (GNU) 12.1.1 20220711 [master 5efa23f3389]" .section .note.GNU-stack,"",@progbits --=20 embedded brains GmbH Herr Sebastian HUBER Dornierstr. 4 82178 Puchheim Germany email: sebastian.huber@embedded-brains.de phone: +49-89-18 94 741 - 16 fax: +49-89-18 94 741 - 08 Registergericht: Amtsgericht M=C3=BCnchen Registernummer: HRB 157899 Vertretungsberechtigte Gesch=C3=A4ftsf=C3=BChrer: Peter Rasmussen, Thomas= D=C3=B6rfler Unsere Datenschutzerkl=C3=A4rung finden Sie hier: https://embedded-brains.de/datenschutzerklaerung/