From patchwork Fri Nov 4 19:01:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 59964 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 52DF93857B83 for ; Fri, 4 Nov 2022 19:06:29 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 52DF93857B83 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1667588789; bh=7ojRMpkpulgGcXzz+J8CnuKEEQTMhW0aHtFC9MnA4bU=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=KssWxSsCt3jw8N+n/3/G50WEaCDVR+FjsWHZXcBabys6jlCykvZO0cn1v/LWhzQVq jL2bXoya6FNKrr7c/tn5uLpryDsL96D9C0C9C5Pphuj8aD7m5H995NOHNdZ4f95jje ClkK3GQSiCOvfOS3qx9qh2FyMB11f3yfx2kop9rc= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-oa1-x34.google.com (mail-oa1-x34.google.com [IPv6:2001:4860:4864:20::34]) by sourceware.org (Postfix) with ESMTPS id EF988385828B for ; Fri, 4 Nov 2022 19:01:29 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org EF988385828B Received: by mail-oa1-x34.google.com with SMTP id 586e51a60fabf-13ba86b5ac0so6535383fac.1 for ; Fri, 04 Nov 2022 12:01:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=7ojRMpkpulgGcXzz+J8CnuKEEQTMhW0aHtFC9MnA4bU=; b=0VkQD1bmIPQ0g5PucKQBXPehT3WiUjbmpsTgcb/uc+lcQrWX8BlNgQ2Dbj4gKQFB0M tsD2P2BGhb2Q+HNKatqn9fYVRLCeE6Nm+eEYljOXl6yvbgc/quyeLlniLZx0u8ilObpa DcAoGYEBg91ap5+PtMO4oH6CgfHssNRXdFpVHkm/lzJ0y8bB0dLpt1GbnHCzi5DSXi76 aBSCebSJs/03OzMBvKzCM/rzSpbH2S8CzIY6VWyWwYD/98uFHz7LvJxX0Rgqno4+fwbY g3kzfOAWswZCZZtWQlSjAvm3kz+iq0a3vxF8aZRYHsMaAYZrYY6x48tRbpieyWAQrPRP STxw== X-Gm-Message-State: ACrzQf2j/E+T0hT2G/pCrLMPGIsoNNlValok2ftjBM8aU1ulFr83WuRF JrxrwkF2hbNOYQROcX+kVUPgLI6vcZdbTK7U X-Google-Smtp-Source: AMsMyM76yvZ8NNa6u2TpHAmHhhrKJrsUEkdkeUyetOQfB0MsaVP5LIhbMV9dW5dE6OW1/5yvnpfuYw== X-Received: by 2002:a05:6870:9597:b0:13b:c024:8ed7 with SMTP id k23-20020a056870959700b0013bc0248ed7mr21480612oao.112.1667588489041; Fri, 04 Nov 2022 12:01:29 -0700 (PDT) Received: from mandiga.. ([2804:1b3:a7c0:a9f4:f725:94bd:4cc1:1762]) by smtp.gmail.com with ESMTPSA id 24-20020aca1018000000b0035763a9a36csm1764713oiq.44.2022.11.04.12.01.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Nov 2022 12:01:28 -0700 (PDT) To: libc-alpha@sourceware.org, Szabolcs Nagy , "H . J . Lu" Subject: [PATCH v2 07/11] s390x: Add the clone3 wrapper Date: Fri, 4 Nov 2022 16:01:08 -0300 Message-Id: <20221104190112.2566409-8-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221104190112.2566409-1-adhemerval.zanella@linaro.org> References: <20221104190112.2566409-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-12.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Cc: Christian Brauner Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" It follows the internal signature: extern int clone3 (struct clone_args *__cl_args, size_t __size, int (*__func) (void *__arg), void *__arg); Checked on s390x-linux-gnu. --- sysdeps/unix/sysv/linux/s390/s390-64/clone3.S | 81 +++++++++++++++++++ sysdeps/unix/sysv/linux/s390/sysdep.h | 1 + 2 files changed, 82 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/s390/s390-64/clone3.S diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S new file mode 100644 index 0000000000..873d9a74b7 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S @@ -0,0 +1,81 @@ +/* The clone3 syscall wrapper. Linux/s390x version. + Copyright (C) 2022 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#define _ERRNO_H 1 +#include + +/* The userland implementation is: + int clone3 (struct clone_args *cl_args, size_t size, + int (*func)(void *arg), void *arg); + + the kernel entry is: + int clone3 (struct clone_args *cl_args, size_t size); + + The parameters are passed in registers from userland: + r2: cl_args + r3: size + r4: func + r5: arg */ + + .text +ENTRY(__clone3) + stg %r6, 48(%r15) + + /* Sanity check args. */ + ltgr %r2, %r2 + je error + ltgr %r6, %r4 + je error + + /* Do the system call, the kernel expects: + r1: system call number + r2: cl_args + r3: size */ + lghi %r1, SYS_ify(clone3) + svc 0 + ltgr %r2,%r2 /* check return code */ + jz thread_start + lg %r6, 48(%r15) + jgm SYSCALL_ERROR_LABEL + br %r14 +error: + lghi %r2,-EINVAL + jg SYSCALL_ERROR_LABEL +PSEUDO_END (__clone3) + + .align 4 + .type thread_start, %function +thread_start: + cfi_startproc + /* Mark r14 as undefined in order to stop unwinding here. */ + cfi_undefined (r14) + + /* func is in gpr 6, arg in gpr 5. */ + lgr %r2, %r5 + aghi %r15, -160 + xc 0(8,%r15),0(%r15) + basr %r14, %r6 + + DO_CALL (exit, 1) + cfi_endproc + .size thread_start, .-thread_start + +libc_hidden_def (__clone3) +weak_alias (__clone3, clone3) diff --git a/sysdeps/unix/sysv/linux/s390/sysdep.h b/sysdeps/unix/sysv/linux/s390/sysdep.h index 930d7efe03..366c797ef1 100644 --- a/sysdeps/unix/sysv/linux/s390/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/sysdep.h @@ -72,6 +72,7 @@ #ifdef __s390x__ #define HAVE_CLOCK_GETRES64_VSYSCALL "__kernel_clock_getres" #define HAVE_CLOCK_GETTIME64_VSYSCALL "__kernel_clock_gettime" +#define HAVE_CLONE3_WRAPPER 1 #else #define HAVE_CLOCK_GETRES_VSYSCALL "__kernel_clock_getres" #define HAVE_CLOCK_GETTIME_VSYSCALL "__kernel_clock_gettime"