From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9E39C433EF for ; Mon, 24 Jan 2022 22:53:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1839502AbiAXWvG (ORCPT ); Mon, 24 Jan 2022 17:51:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1572900AbiAXVmu (ORCPT ); Mon, 24 Jan 2022 16:42:50 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD133C0419DE; Mon, 24 Jan 2022 12:31:23 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6CA8B61382; Mon, 24 Jan 2022 20:31:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F4BAC340E5; Mon, 24 Jan 2022 20:31:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643056282; bh=8Yt00TSqkUG5zmPCAKbAEstzXYANjL5hTNzJAqPXA70=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j6RDx0NuYT+Bs4UDoMak/YyMZaSj4vsFNkg3U7OmjeisSsKZI29x90sE+IIHSAiiN DHJZB1M2gj9c+Q0jT+aXLLKYTgUMfqoFl6/OTf63Iz9C28zLMYLJWo7K26WAaU1BEK n4yH6M4oEPhrEIe8STZXXpn1PDKNmUe0CfoYRvfQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rob Landley , Arnd Bergmann , Stafford Horne , Sasha Levin Subject: [PATCH 5.15 400/846] openrisc: Add clone3 ABI wrapper Date: Mon, 24 Jan 2022 19:38:37 +0100 Message-Id: <20220124184114.751113365@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184100.867127425@linuxfoundation.org> References: <20220124184100.867127425@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stafford Horne [ Upstream commit 433fe39f674d58bc7a3e8254a5d2ffc290b7e04e ] Like fork and clone the clone3 syscall needs a wrapper to save callee saved registers, which is required by the OpenRISC ABI. This came up after auditing code following a discussion with Rob Landley and Arnd Bergmann [0]. Tested with the clone3 kselftests and there were no issues. [0] https://lore.kernel.org/all/41206fc7-f8ce-98aa-3718-ba3e1431e320@landley.net/T/#m9c0cdb2703813b9df4da04cf6b30de1f1aa89944 Fixes: 07e83dfbe16c ("openrisc: Enable the clone3 syscall") Cc: Rob Landley Cc: Arnd Bergmann Signed-off-by: Stafford Horne Signed-off-by: Sasha Levin --- arch/openrisc/include/asm/syscalls.h | 2 ++ arch/openrisc/kernel/entry.S | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/arch/openrisc/include/asm/syscalls.h b/arch/openrisc/include/asm/syscalls.h index 3a7eeae6f56a8..aa1c7e98722e3 100644 --- a/arch/openrisc/include/asm/syscalls.h +++ b/arch/openrisc/include/asm/syscalls.h @@ -22,9 +22,11 @@ asmlinkage long sys_or1k_atomic(unsigned long type, unsigned long *v1, asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp, void __user *parent_tid, void __user *child_tid, int tls); +asmlinkage long __sys_clone3(struct clone_args __user *uargs, size_t size); asmlinkage long __sys_fork(void); #define sys_clone __sys_clone +#define sys_clone3 __sys_clone3 #define sys_fork __sys_fork #endif /* __ASM_OPENRISC_SYSCALLS_H */ diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index edaa775a648e6..c68f3349c1741 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -1170,6 +1170,11 @@ ENTRY(__sys_clone) l.j _fork_save_extra_regs_and_call l.nop +ENTRY(__sys_clone3) + l.movhi r29,hi(sys_clone3) + l.j _fork_save_extra_regs_and_call + l.ori r29,r29,lo(sys_clone3) + ENTRY(__sys_fork) l.movhi r29,hi(sys_fork) l.ori r29,r29,lo(sys_fork) -- 2.34.1