From patchwork Mon Jul 4 17:54:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ammar Faizi X-Patchwork-Id: 12905762 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 F3D06C433EF for ; Mon, 4 Jul 2022 17:55:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229717AbiGDRzF (ORCPT ); Mon, 4 Jul 2022 13:55:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229894AbiGDRzE (ORCPT ); Mon, 4 Jul 2022 13:55:04 -0400 Received: from gnuweeb.org (gnuweeb.org [51.81.211.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19B56DE83 for ; Mon, 4 Jul 2022 10:55:04 -0700 (PDT) Received: from integral2.. (unknown [36.81.65.188]) by gnuweeb.org (Postfix) with ESMTPSA id 0ED13800EF; Mon, 4 Jul 2022 17:55:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1656957303; bh=yghAnwMuF0YXLqQdTKb1gs5igNwoSinLSeS4Ea+dVM4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DM8Os5OYkitsGEeYx7I5eOMwllST69W6I0E3GME5AwdqwMyEd8kMAkX++8axxc7eG +LXCSt5itm3dAZ4OjtI7iVRRXyh0gnh3t101xEqI9MLNWX7z9Psuop9lsfSsK6NqKV 7EYlzQywlifRtcJ98JzwNlhfImhp6inyquQucU5oGleHkqOdvpSNnnoE7XBXAcnopu JS3xLvFXOCAykc3zlPU5ByBQW7nOEL/iDc/G7MoRIu6GC6OGUpN8BFLlX8833Ce1VJ R80luFon28vXnOiTa1TQMPawGnYw1rZqYtrmVEkT1de2Lipdz5LLpUQWWlNKdVeU+Y joU6Ia+8YSKuQ== From: Ammar Faizi To: Jens Axboe Cc: Ammar Faizi , Alviro Iskandar Setiawan , Fernanda Ma'rouf , Hao Xu , Pavel Begunkov , io-uring Mailing List , GNU/Weeb Mailing List Subject: [PATCH liburing v3 02/10] arch: syscall: Add `__sys_open()` syscall Date: Tue, 5 Jul 2022 00:54:28 +0700 Message-Id: <20220704174858.329326-3-ammar.faizi@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220704174858.329326-1-ammar.faizi@intel.com> References: <20220704174858.329326-1-ammar.faizi@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org From: Ammar Faizi A prep patch to support aarch64 nolibc. We will use this to get the page size by reading /proc/self/auxv. For some reason __NR_open is not defined, so also define it in aarch64 syscall specific file. v3: - Use __NR_openat if __NR_open is not defined. Signed-off-by: Ammar Faizi Reviewed-by: Alviro Iskandar Setiawan --- src/arch/generic/syscall.h | 9 +++++++++ src/arch/syscall-defs.h | 14 ++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/src/arch/generic/syscall.h b/src/arch/generic/syscall.h index fa93064..71b2234 100644 --- a/src/arch/generic/syscall.h +++ b/src/arch/generic/syscall.h @@ -7,6 +7,8 @@ #ifndef LIBURING_ARCH_GENERIC_SYSCALL_H #define LIBURING_ARCH_GENERIC_SYSCALL_H +#include + static inline int ____sys_io_uring_register(int fd, unsigned opcode, const void *arg, unsigned nr_args) { @@ -41,6 +43,13 @@ static inline int ____sys_io_uring_enter(int fd, unsigned to_submit, _NSIG / 8); } +static inline int __sys_open(const char *pathname, int flags, mode_t mode) +{ + int ret; + ret = open(pathname, flags, mode); + return (ret < 0) ? -errno : ret; +} + static inline void *__sys_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset) { diff --git a/src/arch/syscall-defs.h b/src/arch/syscall-defs.h index 1e8ae1b..9d4424d 100644 --- a/src/arch/syscall-defs.h +++ b/src/arch/syscall-defs.h @@ -3,6 +3,20 @@ #ifndef LIBURING_ARCH_SYSCALL_DEFS_H #define LIBURING_ARCH_SYSCALL_DEFS_H +#include + +static inline int __sys_open(const char *pathname, int flags, mode_t mode) +{ + /* + * Some architectures don't have __NR_open, but __NR_openat. + */ +#ifdef __NR_open + return __do_syscall3(__NR_open, pathname, flags, mode); +#else + return __do_syscall4(__NR_openat, AT_FDCWD, pathname, flags, mode); +#endif +} + static inline void *__sys_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset) {