From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outpost1.zedat.fu-berlin.de (outpost1.zedat.fu-berlin.de [130.133.4.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E44B7269823 for ; Mon, 19 May 2025 08:43:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=130.133.4.66 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747644191; cv=none; b=AdkJyms2mjyStsip1DVGQS1FzOSI0AL4sMOFBrxYEOhgjOv5OZo44NKy6KyiTQvDqqlekAC/X4pucRXQUKMSNlBFGXO6BS8PMF8COkdmzODg6kygnANRumszdI2OjIMCRWZpZpp8Adjuyd7HXvXf6Gl9otACg4S7JKQrEgt8ArE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747644191; c=relaxed/simple; bh=iP/F/7JpvtiVY66yBuoiIEVbMYJxJvWqTSecgRJ2bPo=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=nIGMrMvRBrDD8KTAODmSccMaWD1XIRyigDOH1QtQ95LCzOiEf7ToE4hNzGh10tO0gAPD1S38YfLAYQy8Sf5E28JVPd9Zh6iRsCG4AvWMF9gxmkJYKsfWQtNGPSqkpTR6b9sN3+9FmBzfb9npRbL4MZ3JC17k6x04CtkD4s1Nl64= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=physik.fu-berlin.de; spf=pass smtp.mailfrom=zedat.fu-berlin.de; dkim=pass (2048-bit key) header.d=fu-berlin.de header.i=@fu-berlin.de header.b=Pxy3eZKj; arc=none smtp.client-ip=130.133.4.66 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=physik.fu-berlin.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zedat.fu-berlin.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fu-berlin.de header.i=@fu-berlin.de header.b="Pxy3eZKj" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=fu-berlin.de; s=fub01; h=MIME-Version:Content-Transfer-Encoding: Content-Type:References:In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=Ts5jRVIJ4rCUnALmV2hu9+ZrnxpKYC0l2+cZy65l+Os=; t=1747644189; x=1748248989; b=Pxy3eZKjoyAbf+i9ipNH77iSdyYilTrWtZ30LSVnn//LcfgW7H2/M2XZsAHUTXbXm0Hpo6546Do ZPB5HmJv4Iz/TqWbcqDsK7ucDZKHkD64+ObR2rM2MSX7p3P/5H5NeofiOH9LD9xocgPlZ9doXW0PT T2cnUtjj/QSz5p3CYFxkD6CVITEt9AlkVew7Ui9ZkmlU1U5pFPSBPWNarsiJw6IUZMYtJQ/GROV4k IU6b8t6pKsSvmc0QpUgMOpxz4/Didh9+WSkRlga1mb3Ejq1v3LNUgKz2Sk9fMvbiC7DTOkDqQvV0n Q+lt5gMbSXt0lPixkTV0AW7zqeyJe+EjM2Uw==; Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost.zedat.fu-berlin.de (Exim 4.98) with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1uGw5R-00000004Bch-1H5J; Mon, 19 May 2025 10:43:05 +0200 Received: from p5b13afe4.dip0.t-ipconnect.de ([91.19.175.228] helo=[192.168.178.61]) by inpost2.zedat.fu-berlin.de (Exim 4.98) with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1uGw5R-000000031hJ-0GRa; Mon, 19 May 2025 10:43:05 +0200 Message-ID: Subject: Re: Tuple and changes for m68k with -malign-int From: John Paul Adrian Glaubitz To: Geert Uytterhoeven Cc: Andreas Schwab , Antonio Vargas Gonzalez , James Le Cuirot , libc-help@sourceware.org, debian-68k , linux-m68k Date: Mon, 19 May 2025 10:43:04 +0200 In-Reply-To: References: <08ce465732a0eb0dce550978c98ef822abba5f96.camel@physik.fu-berlin.de> <75c912630ade4e05af08eab9584c6f56d7c0ca1f.camel@physik.fu-berlin.de> <08f471d5cb51ed0fe5a3eb64fad088f3072d4784.camel@physik.fu-berlin.de> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.1 Precedence: bulk X-Mailing-List: linux-m68k@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Original-Sender: glaubitz@physik.fu-berlin.de X-ZEDAT-Hint: PO Hi Geert, On Mon, 2025-05-19 at 10:25 +0200, Geert Uytterhoeven wrote: > On Mon, 19 May 2025 at 10:18, John Paul Adrian Glaubitz > wrote: > > On Mon, 2025-05-19 at 10:03 +0200, Andreas Schwab wrote: > > > On Mai 19 2025, John Paul Adrian Glaubitz wrote: > > >=20 > > > > Good idea. I will do that. My assumption is that on Linux, GCC deve= lopers > > > > actually just forgot to switch alignment from 2 to 4 bytes with the= switch > > > > to ELF unlike NetBSD. > > >=20 > > > The Linux developers care about backward compatilibity. > >=20 > > That makes no sense though as a.out and ELF binaries are not compatible= , are they? >=20 > The syscall ABI is. Fair enough. But a.out is long gone now and anyone who runs Linux/m68k thes= e days does that as a hobbyist. I think that the advantages of fixing several dozens of= alignment bugs once and for all hugely outweighs the disadvantage of breaking compati= bility with old binaries. If I understand correctly, there was an (unintended) ABI break on Linux/s39= 0 as well and it seems that it was not reverted [1]. Maybe someone involved in this d= iscussion from back then can comment. Adrian > [1] https://lwn.net/Articles/605607/ --=20 .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913