From patchwork Fri Feb 3 17:12:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 64267 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 9257A3858408 for ; Fri, 3 Feb 2023 17:14:40 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9257A3858408 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1675444480; bh=mv2z6fIWOVfa+yhLLzdaqnii16YNEJSofdmi2xHXMIs=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To: From; b=iSJmhLIHdMyPt5lnG0g/QHjh0KUJLhaLvWyhQUI7cRw+yMeQ8g4mE4hkg9l63c5eg zM4mJXZuUjIPrQIvlaPa7pXxZwhrhiph5EYr2j6uNwQ5Fh5aIMcLm1H+sO60mO8Ejb VS8E+WdMkbgkiM6yGhIT6DLA1m5GKNgBKNJThn4U= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-ot1-x335.google.com (mail-ot1-x335.google.com [IPv6:2607:f8b0:4864:20::335]) by sourceware.org (Postfix) with ESMTPS id 1FD053858426 for ; Fri, 3 Feb 2023 17:12:50 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 1FD053858426 Received: by mail-ot1-x335.google.com with SMTP id g21-20020a9d6495000000b0068bb336141dso1537616otl.11 for ; Fri, 03 Feb 2023 09:12:50 -0800 (PST) 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=mv2z6fIWOVfa+yhLLzdaqnii16YNEJSofdmi2xHXMIs=; b=TtbhjNqh18NKYyE1d17uqdThgc1wrYysqPKeRoUjcTlq1LOpWFKMbGqTS+QnChrHQw inSTGWHdXCVEeYzwGpZDCbJ4lWLluSsE98hH9Mr165anFyWdmfiBXBZvLDQSifAL67Vd VIX2sakHccQHwRwSuKk+ut/ssquoYqWxUFWdgCRnA/8HrTD0C54L6I8q2DtVN9NxwpzC OrBhAwYdU4lCiKWmEEqH0qs4s9kOD/EwJLbUuoBjV6eD3HWf9HPrLOnrBRcCu72F5Dyv TqaDt4VgLpY83ip5igGzDUQlP1txstvF2+lPj/IQZnGh9502RuH47+2dHKIjud7QwRIM UQfw== X-Gm-Message-State: AO0yUKX8zP9aZulhay9FG04Gm38pzYNI4I5IEoPz/haZD3ynNzZsE+7k rJxitQPQlm3u/w3I0tW+FYRFTLIKyJF08PWgaqU= X-Google-Smtp-Source: AK7set8uwDpCgcfMacYX/3EbRw/7PTjS5SWS6oLDW26ds3UZ2kbtQ/w67arrtNWVoF8TMfc5HOB4LQ== X-Received: by 2002:a05:6830:309b:b0:68b:bf5e:492c with SMTP id g27-20020a056830309b00b0068bbf5e492cmr5426892ots.28.1675444368852; Fri, 03 Feb 2023 09:12:48 -0800 (PST) Received: from mandiga.. ([2804:1b3:a7c2:1887:38a0:ca4:680a:31ed]) by smtp.gmail.com with ESMTPSA id cp23-20020a056830661700b0068bdd78f763sm1346672otb.29.2023.02.03.09.12.47 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Feb 2023 09:12:48 -0800 (PST) To: libc-alpha@sourceware.org Subject: [PATCH 4/5] arm: Add the clone3 wrapper Date: Fri, 3 Feb 2023 14:12:36 -0300 Message-Id: <20230203171237.1220878-5-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 X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, KAM_STOCKGEN, 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 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 arm-linux-gnueabihf. --- sysdeps/unix/sysv/linux/arm/clone3.S | 80 ++++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/arm/sysdep.h | 1 + 2 files changed, 81 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/arm/clone3.S diff --git a/sysdeps/unix/sysv/linux/arm/clone3.S b/sysdeps/unix/sysv/linux/arm/clone3.S new file mode 100644 index 0000000000..f236d18390 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arm/clone3.S @@ -0,0 +1,80 @@ +/* The clone3 syscall wrapper. Linux/arm 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: + r0: cl_args + r1: size + r2: func + r3: arg */ + + .text +ENTRY(__clone3) + /* Sanity check args. */ + cmp r0, #0 + ite ne + cmpne r1, #0 + moveq r0, #-EINVAL + beq PLTJMP(syscall_error) + + /* Do the syscall, the kernel expects: + r7: system call number: + r0: cl_args + r1: size */ + push { r7 } + cfi_adjust_cfa_offset (4) + cfi_rel_offset (r7, 0) + ldr r7, =SYS_ify(clone3) + swi 0x0 + cfi_endproc + + cmp r0, #0 + beq 1f + pop {r7} + blt PLTJMP(C_SYMBOL_NAME(__syscall_error)) + RETINSTR(, lr) + + cfi_startproc +PSEUDO_END (__clone3) + +1: + .fnstart + .cantunwind + mov r0, r3 + mov ip, r2 + BLX (ip) + + /* And we are done, passing the return value through r0. */ + ldr r7, =SYS_ify(exit) + swi 0x0 + + .fnend + +libc_hidden_def (__clone3) +weak_alias (__clone3, clone3) diff --git a/sysdeps/unix/sysv/linux/arm/sysdep.h b/sysdeps/unix/sysv/linux/arm/sysdep.h index 2f321881c8..57fc5f16bd 100644 --- a/sysdeps/unix/sysv/linux/arm/sysdep.h +++ b/sysdeps/unix/sysv/linux/arm/sysdep.h @@ -362,6 +362,7 @@ __local_syscall_error: \ #define HAVE_CLOCK_GETTIME_VSYSCALL "__vdso_clock_gettime" #define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime64" #define HAVE_GETTIMEOFDAY_VSYSCALL "__vdso_gettimeofday" +#define HAVE_CLONE3_WRAPPER 1 #define LOAD_ARGS_0() #define ASM_ARGS_0