From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ot1-x334.google.com (mail-ot1-x334.google.com [IPv6:2607:f8b0:4864:20::334]) by sourceware.org (Postfix) with ESMTPS id 451093858C30 for ; Fri, 3 Feb 2023 17:12:46 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 451093858C30 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=linaro.org Received: by mail-ot1-x334.google.com with SMTP id x26-20020a056830115a00b0068bbc0ee3eeso1555545otq.0 for ; Fri, 03 Feb 2023 09:12:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=GAxnSPpbL6ErEnHSnVRB8HqjSOwNWNelOLHvoVpXugw=; b=LI37xIa/iKa3CHIAHPdIsHfXSP4xbBmrDRcxIVt0fSlTD2umDqH8qp+dAJrikiWn0f krrD4JgKjODtJEx8E762NztMxfJSTNrXwaRq4mz1uAwhk9DrFpJtdC9mKsPF61tlBwcT 2UEBE+5qA/cqgs/Z+MyGZnnhkJ7UMlNXAjIg1eH3qCjvPcj/IJIwagaJ2MDUnUw0vo/I /re53TxRxNPzcKwdIMtnZshESd9QxX+Y6snmyCysOq8a3weG5aSUWOfRKQSmcEbPKlzT 95zW3ALQyLttO677IbF1eT1hKU5m4uFzrFx9hUgPGIbpdqoIzghSGaRwOApR/KhAIws5 0zZw== 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:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GAxnSPpbL6ErEnHSnVRB8HqjSOwNWNelOLHvoVpXugw=; b=4me1NQHhN5qQPNrN51B/+gTVHQMrrsLl8PNXATR18x19xdL6zon1y0PlenlWasHIV8 E33sI9yJAm0yyfstzvGwZtBDH9MzX9XqNan+e+lyjFrEmKPOwfFF5mmpvLQs6EB7CCXm u0P0eK+gGvQDgn9BbhN+0TjYzRbjvnVvkydSCJdWwjdeVTKh4cWjQyvCp3GFoBnCALuJ pghm/5trXVFLSXIPyRy6mOkn9Y/DSsFXfU1Hebrdmwfj9vjyGPA906RjQ1v8Me+3l7kP z68bT+8PKuJjtHUuZj8r8eKcFI+BPXxQsflwFxPwiQjqE6DRuDWuWjPNy8SP6xz4JjR7 2/Zg== X-Gm-Message-State: AO0yUKUjvH/PxR1fJzrPYVPa+YtQxv6vh2XTJdxzmzeF7LNfNAiNBAHk fswC9Os2OTH79ZMJ1F2OK3SiIefcFqDVjN42g1U= X-Google-Smtp-Source: AK7set8CtrtTrMipyig+Gtc0k/BUl6qfMnO1ISlZov6xUE8kqiuBUlXFjQMKuU2uGXT5NKGJLxnVMw== X-Received: by 2002:a9d:37c2:0:b0:68d:499b:c1a4 with SMTP id x60-20020a9d37c2000000b0068d499bc1a4mr4199569otb.13.1675444364895; Fri, 03 Feb 2023 09:12:44 -0800 (PST) Received: from mandiga.. ([2804:1b3:a7c2:1887:38a0:ca4:680a:31ed]) by smtp.gmail.com with ESMTPSA id cp23-20020a056830661700b0068bdd78f763sm1346672otb.29.2023.02.03.09.12.43 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Feb 2023 09:12:44 -0800 (PST) From: Adhemerval Zanella To: libc-alpha@sourceware.org Subject: [PATCH 2/5] s390x: Add the clone3 wrapper Date: Fri, 3 Feb 2023 14:12:34 -0300 Message-Id: <20230203171237.1220878-3-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230203171237.1220878-1-adhemerval.zanella@linaro.org> References: <20230203171237.1220878-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-12.4 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 List-Id: 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..417fdcb785 --- /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) 2023 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 3bde8ba19c..b099fea9c6 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" -- 2.34.1