From patchwork Sun Sep 24 21:01:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karim Taha X-Patchwork-Id: 1838843 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=iSWxHcAI; 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 4Rv6Xn0G61z1yng for ; Mon, 25 Sep 2023 12:39:53 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qkbTE-0003tZ-6m; Sun, 24 Sep 2023 22:37:12 -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 1qkbTA-0003kB-Mq for qemu-devel@nongnu.org; Sun, 24 Sep 2023 22:37:08 -0400 Received: from mail-wr1-x42b.google.com ([2a00:1450:4864:20::42b]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qkbT9-0000Ac-62 for qemu-devel@nongnu.org; Sun, 24 Sep 2023 22:37:08 -0400 Received: by mail-wr1-x42b.google.com with SMTP id ffacd0b85a97d-31ff985e292so5152700f8f.1 for ; Sun, 24 Sep 2023 19:37:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1695609425; x=1696214225; 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=iSWxHcAIRYVBIgdbR5aH41IDO59L7utiP/XJ3u8Wy0eq0oevnCEia0rDrjbLWgOHum q7cqVO9SX1vfA8+N6H3SqoxWBSUlXAsjmDIbGEWOW6oBfX5WkP7/QvtRGa3deUI4ugfV qCdQ8E9zfXtJJmW5FNur3hr4JMc2RfRpVbmDo+T8l8hAESTqEwaXVsLIimBHVNtF1jzR Wwk4d/1vCSM1fFi8J0+wj9t9vhsvw03+8FwEtDq5muU5yNeTwrYr70AfVAwA8rcVs6wA Eq5ZJfqt8FFJ3qArxS5vcxFHP6SieahBgMuHnzQ4llbsHiJ9Rxq8sSQvltbKNUhah+j+ oSkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695609425; x=1696214225; 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=sNlGbXsQYy+5A8u1I4zXUG4HDjAyi5SqSAqTJXt0voZ1ZvjAODiF0onc/DyTkktKtj k0deHkgX01pakXc4K1i8NOXBIuE1z5PVuyjci2tT1yJUsSK9gRXhRJX7LBvSICunANqt 33ZrSiiOvVu4QIrFHWNbIhiSKC+is1HpCaQNEwisMxlVD2pRSBFhSfDgoPIGyZ8M3fmy k42lkIozVw4NGcq08JbyFwQOJ9jmF4ex4C8Q6qowvrvmiAmWtp3Cshbe/uDJDn2UFBd9 oP7sAFJk8eePJ6uITsBKUUTVVLiXC938l2z3HsbvEbC4bsp4KE0xqDBR4Gby2jsyeY48 zTRQ== X-Gm-Message-State: AOJu0YyP63O+eWeyoncinBzI7dCnJgYUeI+muuWh44xoz327DZCneFPn 3GLUI4/32xpZ3zRI6c6Df36dSJkU0DM= X-Google-Smtp-Source: AGHT+IFsC63pJBepY4CjQ7kqGZsNvkxk8CkBncfJHqnk0ltvZ03W2j8c9clsyXn1fJFYVSNZZ8fGvw== X-Received: by 2002:adf:ec41:0:b0:319:67ac:4191 with SMTP id w1-20020adfec41000000b0031967ac4191mr4558157wrn.37.1695609425578; Sun, 24 Sep 2023 19:37:05 -0700 (PDT) Received: from karim.my.domain ([197.39.209.18]) by smtp.gmail.com with ESMTPSA id s28-20020adfa29c000000b003232f167df5sm1683wra.108.2023.09.24.19.37.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 24 Sep 2023 19:37:05 -0700 (PDT) From: Karim Taha To: qemu-devel@nongnu.org Cc: Richard Henderson , Warner Losh , Stacey Son , Karim Taha Subject: [PATCH v4 28/28] bsd-user: Implement pdfork(2) system call. Date: Mon, 25 Sep 2023 00:01:36 +0300 Message-ID: <20230924210136.11966-29-kariem.taha2.7@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230924210136.11966-1-kariem.taha2.7@gmail.com> References: <20230924210136.11966-1-kariem.taha2.7@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::42b; envelope-from=kariem.taha2.7@gmail.com; helo=mail-wr1-x42b.google.com X-Spam_score_int: -2 X-Spam_score: -0.3 X-Spam_bar: / X-Spam_report: (-0.3 / 5.0 requ) BAYES_00=-1.9, DATE_IN_PAST_03_06=1.592, 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=no 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;