From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ot1-x330.google.com (mail-ot1-x330.google.com [IPv6:2607:f8b0:4864:20::330]) by sourceware.org (Postfix) with ESMTPS id 86C2A3858C31 for ; Mon, 10 Jul 2023 18:40:30 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 86C2A3858C31 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-x330.google.com with SMTP id 46e09a7af769-6b5d7e60015so4337760a34.0 for ; Mon, 10 Jul 2023 11:40:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1689014429; x=1691606429; 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=mv2z6fIWOVfa+yhLLzdaqnii16YNEJSofdmi2xHXMIs=; b=ssTif+MdR1kUU3J1TPoD6FCtmZDpRqNdxV6Rl/aOF+4tYWJep8YB+FI1/IUSxMG97P 0hEMkAV8Cef2qe1KdMXqUCsq3hV5vjRo5jK+8BbpAI+GszVCMXrBL5wXhj3LAJmVVx8t ofwCLgKFp7xbvN8ExIloyDvn9a4dG0R1fI6FyZfn5dbAJA1DAhamdGzRdasEb+PDsQUN XRuVQ5oVc3caPI1h/WdahypeYS6+E2gDEYv/TlRNWuVYqEo69D0G4BYypV9PEQpSB5Fw h2WBE2H/tG6WJjeqkINgR9/2/gEKwQ/gUR5WSpbv+NC8rKHazHj/6VPWNmiiXnf8hQyI qGbA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689014429; x=1691606429; 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=TTXOls9GzCgLaERoh3YFm4cDS/13RK8Sy1KlSthCkPqd/4tPBONx6ykz2Hlngtwgf2 ksYwrF72TDHS9oKKWmFiYLVGcqHyePpQgT4X/GzO85Y+CQsNPD9zWzjapeqNz/W3i/PJ XGT5085JQTt8K466LXk2BXVli6JZwIpkMqCNUE9Nc1t68IbUx94j9OduP/hkYnmWj7VX NQdcjEs1ieVWMFGf9sQMo0qkaZYXR1nbRHH/F1npTuqnPspBNgtGmjnunwPXR803JCTp 2HPCweLTcVPIm3+oTekvwmOZqfGE+kkkJMvtYBNE8d5+LYSWU81dLuVD8jo7hcUsl3Yd XPaw== X-Gm-Message-State: ABy/qLb0LUlxHZPAt2iD8BPZVFiQn/vi3VWxqtBRXbjhiakHURrOOq7U vhWP1ZZDlTBqDz4KtbWFXFIyIRrQfeAUUgDZ1UldpQ== X-Google-Smtp-Source: APBJJlE2Q7jW/xh+PaSv0LP4H8CWyXsi0mBaEDx1r67dRYF1BlNdKo0pWBtRgQZ7wIT6uhZSMz2rmg== X-Received: by 2002:a05:6870:910c:b0:1b0:3433:7664 with SMTP id o12-20020a056870910c00b001b034337664mr14780245oae.40.1689014429472; Mon, 10 Jul 2023 11:40:29 -0700 (PDT) Received: from mandiga.. ([2804:1b3:a7c3:e0c8:7b0c:2ea0:abcd:d43d]) by smtp.gmail.com with ESMTPSA id y22-20020a056870381600b001b3ce175979sm215915oal.41.2023.07.10.11.40.28 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Jul 2023 11:40:29 -0700 (PDT) From: Adhemerval Zanella To: libc-alpha@sourceware.org Subject: [PATCH v2 2/4] arm: Add the clone3 wrapper Date: Mon, 10 Jul 2023 15:40:20 -0300 Message-Id: <20230710184022.3701346-3-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230710184022.3701346-1-adhemerval.zanella@linaro.org> References: <20230710184022.3701346-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-11.3 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,T_SCC_BODY_TEXT_LINE 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 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 -- 2.34.1