From nobody Tue Feb 10 12:57:22 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1688065426; cv=none; d=zohomail.com; s=zohoarc; b=haugQGWxi3fNd3wTr/ZHjt5jGdpfYJURS0O6JETAYbxm2o5yAlAd0GlSFPnZQU5j1el/9PaVupU0Z71hnrg0kn0N0Ou5yP5HEsYeIUvPp/O/0agrLBw0ZVj+ktx1MswM17W6GeRXHtM1gGlY9Dx+KmWg8owirY++4VZ4DiHdEJ8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1688065426; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=ngCgJtW8CzfdCgM2cdpZUv/LD6JmRFepy4WcqlBiQFs=; b=Tt5R+WDVAQImdP2C3E1Q7boVr7LCW+u3CMOePDi5bcimWOkqtcj039fpFcvxj2SshTu0nYYI4S6LmHu/vPOImR1VHfeKli2MUCn9HphXRu8OU1wEPy0u1qp/39f7VpjdRll5k6y8BunhjBdXTcyMPjQ4+LvXTZ+2XLymkwHXauc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 168806542665397.88693804053958; Thu, 29 Jun 2023 12:03:46 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qEwvS-0006ev-Mn; Thu, 29 Jun 2023 15:03:30 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qEwvR-0006e7-9k for qemu-devel@nongnu.org; Thu, 29 Jun 2023 15:03:29 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qEwvP-0005SU-9g for qemu-devel@nongnu.org; Thu, 29 Jun 2023 15:03:29 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-194-j0lS6kprOhyssulFEtnD1Q-1; Thu, 29 Jun 2023 15:03:22 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 621533C1CCC3; Thu, 29 Jun 2023 19:03:22 +0000 (UTC) Received: from thuth.com (unknown [10.39.192.37]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8C74F140E952; Thu, 29 Jun 2023 19:03:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1688065406; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ngCgJtW8CzfdCgM2cdpZUv/LD6JmRFepy4WcqlBiQFs=; b=I5PZ8sSm9KsqCQEqWae5bK/j5H5P4//n+INcvu1pmG5oiV0XodZkT3WWsfQjSDitSWXHi4 IA6qDSxgzZIeERYiv8tFaV/zn7L6hPDYR5uyDkLKqjcXweDXyq3S5AJSMAxIorNghvl7oi LKKSmNOaZrW5GNbas7gGLHyrTVXHqaM= X-MC-Unique: j0lS6kprOhyssulFEtnD1Q-1 From: Thomas Huth To: qemu-devel@nongnu.org, Richard Henderson Subject: [PULL 7/8] pc-bios/s390-ccw: Don't use __bss_start with the "larl" instruction Date: Thu, 29 Jun 2023 21:03:09 +0200 Message-Id: <20230629190310.337850-8-thuth@redhat.com> In-Reply-To: <20230629190310.337850-1-thuth@redhat.com> References: <20230629190310.337850-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1688065426944100012 Content-Type: text/plain; charset="utf-8" start.S currently cannot be compiled with Clang 16 and binutils 2.40: ld: start.o(.text+0x8): misaligned symbol `__bss_start' (0xc1e5) for relocation R_390_PC32DBL According to the built-in linker script of ld, the symbol __bss_start can actually point *before* the .bss section and does not need to have any alignment, so in certain situations (like when using the internal assembler of Clang), the __bss_start symbol can indeed be unaligned and thus it is not suitable for being used with the "larl" instruction that needs an address that is at least aligned to halfwords. The problem went unnoticed so far since binutils <=3D 2.39 did not check the alignment, but starting with binutils 2.40, such unaligned addresses are now refused. Fix it by loading the address indirectly instead. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=3D2216662 Reported-by: Miroslav Rezanina Suggested-by: Andreas Krebbel Message-Id: <20230629104821.194859-8-thuth@redhat.com> Reviewed-by: Claudio Imbrenda Signed-off-by: Thomas Huth --- pc-bios/s390-ccw/start.S | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/pc-bios/s390-ccw/start.S b/pc-bios/s390-ccw/start.S index 429a2b30a1..061b06591c 100644 --- a/pc-bios/s390-ccw/start.S +++ b/pc-bios/s390-ccw/start.S @@ -19,7 +19,8 @@ _start: larl %r15,stack + STACK_SIZE - STACK_FRAME_SIZE /* Set up stack */ =20 /* clear bss */ - larl %r2,__bss_start + larl %r2,bss_start_literal /* __bss_start might be unaligned ... = */ + lg %r2,0(%r2) /* ... so load it indirectly */ larl %r3,_end slgr %r3,%r2 /* get sizeof bss */ ltgr %r3,%r3 /* bss empty? */ @@ -45,7 +46,6 @@ done: memsetxc: xc 0(1,%r1),0(%r1) =20 - /* * void disabled_wait(void) * @@ -113,6 +113,8 @@ io_new_code: br %r14 =20 .align 8 +bss_start_literal: + .quad __bss_start disabled_wait_psw: .quad 0x0002000180000000,0x0000000000000000 enabled_wait_psw: --=20 2.39.3