From patchwork Mon Sep 25 18:24:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karim Taha X-Patchwork-Id: 1839243 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20230601 header.b=aKhi0QAG; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RvWZY1FSzz1yp8 for ; Tue, 26 Sep 2023 04:27:49 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qkqHy-0001R3-HQ; Mon, 25 Sep 2023 14:26:34 -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 1qkqHu-0001OY-R9 for qemu-devel@nongnu.org; Mon, 25 Sep 2023 14:26:31 -0400 Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qkqHt-0007Sz-C4 for qemu-devel@nongnu.org; Mon, 25 Sep 2023 14:26:30 -0400 Received: by mail-wm1-x32a.google.com with SMTP id 5b1f17b1804b1-405497850dbso51113895e9.0 for ; Mon, 25 Sep 2023 11:26:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1695666388; x=1696271188; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=EEpfVHQYJiHs/o3VXa4xKMUM5FKYuciwQMorXR+KT/8=; b=aKhi0QAG4tG261DmFLKRxaQayxq2/6eenTYcaaArYL6C2WErMj4tApV21ctFotjp5z jVIaZ9br6wAlUGOpHPlEVXfF9XKlTmVOJGhg9YXu6+jXjqM1jU1pomZo1HcflG7FkUA+ 6JzpW/h5FVYTbiTqsYZx2QbsvUtVYwgF3A/Zw/V4vabhen43JRolHiHEv+T3HqxVqbFM PYRXC5xPtPKJcnnde38QYMalMeshJ3nercoFgXAOGkLt5vU1Vx03ZRNJ8/z0l+5LGUMX 9Hl6QGOnz2TaR9feZLYivzgQD/HHXwkpsKVVTSvpSN2zcGbKhwevdoeEpBEVA/tAPcw1 R/Bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695666388; x=1696271188; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=EEpfVHQYJiHs/o3VXa4xKMUM5FKYuciwQMorXR+KT/8=; b=D2Es86lICNOla8w+3AVbiU2pTrIwx3aSE2G46KqzZR5irRHrHjuyluLxmucbtjhb1f BfBJl4JPfTCJ2DouQBF6gbSvPq60X6Ue2iW0cQujmGvT9qg9SuitgsIIX8MdPEhjtado HqmcdfsqAgsidAZTWV3Kuwz+phgi+l++5LWwYXEwQToxed9OL6kLrXF9B915tLD3gY/f neEdGBva+6DWT6xi7TgnutnC8UVXi2zA20gSHcUp3gMV9LpvKSYi+SB7CDvBojyhT83J bo2qIeu90Q7B+OaZSBOchUdhfnpQLoN7lp/tF7ukJtxjNpYj1bmf7kaFLBLzEunU+fHq vTZA== X-Gm-Message-State: AOJu0YwLzNqmbFakqO9QPcXLFCWPNbh4xYrInX37EC3maaBgJD0nf21Y gqOHY7cT/6MzUDzq2d6Z4TzSaKqRnus= X-Google-Smtp-Source: AGHT+IGLmlvUt9EqS8k4MlaUcLuFmVRb6plx4ex5f/4yxJ8YsiBUpsNK6jiEj24XyEPraiMk/7niCw== X-Received: by 2002:a05:600c:3658:b0:405:1bfb:ff14 with SMTP id y24-20020a05600c365800b004051bfbff14mr7379331wmq.9.1695666387606; Mon, 25 Sep 2023 11:26:27 -0700 (PDT) Received: from karim.my.domain ([197.39.209.18]) by smtp.gmail.com with ESMTPSA id 19-20020a05600c229300b00405953973c3sm2232858wmf.6.2023.09.25.11.26.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Sep 2023 11:26:27 -0700 (PDT) From: Karim Taha To: qemu-devel@nongnu.org Cc: Warner Losh , Richard Henderson , Stacey Son , Karim Taha Subject: [PATCH v5 28/28] bsd-user: Implement pdfork(2) system call. Date: Mon, 25 Sep 2023 21:24:25 +0300 Message-ID: <20230925182425.3163-29-kariem.taha2.7@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230925182425.3163-1-kariem.taha2.7@gmail.com> References: <20230925182425.3163-1-kariem.taha2.7@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=kariem.taha2.7@gmail.com; helo=mail-wm1-x32a.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Stacey Son Signed-off-by: Stacey Son Signed-off-by: Karim Taha Acked-by: Richard Henderson Reviewed-by: Warner Losh --- bsd-user/freebsd/os-proc.h | 32 ++++++++++++++++++++++++++++++++ bsd-user/freebsd/os-syscall.c | 4 ++++ 2 files changed, 36 insertions(+) diff --git a/bsd-user/freebsd/os-proc.h b/bsd-user/freebsd/os-proc.h index 0a3cd0ef57..d641878034 100644 --- a/bsd-user/freebsd/os-proc.h +++ b/bsd-user/freebsd/os-proc.h @@ -258,4 +258,36 @@ static inline abi_long do_freebsd_rfork(void *cpu_env, abi_long flags) } +/* pdfork(2) */ +static inline abi_long do_freebsd_pdfork(void *cpu_env, abi_ulong target_fdp, + abi_long flags) +{ + abi_long ret; + abi_ulong child_flag; + int fd; + + fork_start(); + ret = pdfork(&fd, flags); + if (ret == 0) { + /* child */ + child_flag = 1; + target_cpu_clone_regs(cpu_env, 0); + } else { + /* parent */ + child_flag = 0; + if (put_user_s32(fd, target_fdp)) { + return -TARGET_EFAULT; + } + } + + /* + * The fork system call sets a child flag in the second return + * value: 0 for parent process, 1 for child process. + */ + set_second_rval(cpu_env, child_flag); + fork_end(child_flag); + + return ret; +} + #endif /* BSD_USER_FREEBSD_OS_PROC_H */ diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index 4c4e773d1d..d04712f0a7 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -238,6 +238,10 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1, ret = do_freebsd_rfork(cpu_env, arg1); break; + case TARGET_FREEBSD_NR_pdfork: /* pdfork(2) */ + ret = do_freebsd_pdfork(cpu_env, arg1, arg2); + break; + case TARGET_FREEBSD_NR_execve: /* execve(2) */ ret = do_freebsd_execve(arg1, arg2, arg3); break;