From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 396E7385734B for ; Fri, 18 Aug 2023 14:06:52 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 396E7385734B 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-oa1-x34.google.com with SMTP id 586e51a60fabf-1c8c44053e8so510522fac.1 for ; Fri, 18 Aug 2023 07:06:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1692367610; x=1692972410; 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=yX81Y3q8NFCYkfICA+7gPgZc8a5XN+mesJjMMWHBc2XBqHIGBDvcxb/ZP8OwGOnsPS /+fDEDJjx1scNfVsFXYaa9uy43WGbxGJeaiKMnr/JljzflFXADzBOl+zAjOVjjtwPaDC gSUB6Q6R/vGstrfadl85gB75JQG+k9ku4Exlu4bNlryYOSkOIQQvegYpSEFmSp5QIZcT 16hRugQKaoqrNxsNcCcR5sWePrYGnV1qK2wJ/xt6UsUoVYRBaYHz8bXP5Bmig66J8nRq I7DOfCciAp/sHSEWyZ+SzUl9UCB+y/HldDXchSI3EKj3pWjbEiu/KnyPbWSKdAKGj4wP V/lA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692367610; x=1692972410; 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=lGYOCOBmhG2GqB28LrAmD3OqL775K5pdEOIkGlODvToejr62AYd/XuQo2wy+BUfKOT AOXH3jmjU9S5emEPipo31wlXOfKiLBLvW4/SSfVDJUbX4hXQ9UeaFKmaB9VYEvQwgB5g 3FfvtYjVhJafB4XCrHesFUzGGVxbv6THMShJ/oWA5z0DwAu45e1YVkEYzgqF2cYVgHMS nOStgzB5h3TtC5mraV469lNcOqwxMP/aAOFmymWSFuW9IQW/PZysE/qT6h7oC8WpyEx/ cbrrmu6XKAC4RSMXyQ0Ho+7yoyt/ValLr7eTUoSADwIPT8QmJm4KArjIzu02bFCley1B HD0Q== X-Gm-Message-State: AOJu0YxrJPPmF/J3PbbzifSLY6G6qYBPkW42ewej1fiWFBlCISNVy9nY /x8N8XimCd8DYL+M0dKh8ThsVnT0LQ39vuQ5liakvw== X-Google-Smtp-Source: AGHT+IGv6wttxNZnPCzGc8exz9+V+hmK2QuIOSzVAwbxsrJAUUvQpzIhNFoB5wQzlmg13Rdkr1PrKQ== X-Received: by 2002:a05:6870:220e:b0:1c0:a784:cf5a with SMTP id i14-20020a056870220e00b001c0a784cf5amr1632189oaf.27.1692367609893; Fri, 18 Aug 2023 07:06:49 -0700 (PDT) Received: from mandiga.. ([2804:1b3:a7c2:c275:7563:d0a5:7f5d:1313]) by smtp.gmail.com with ESMTPSA id r7-20020a056870734700b001c0e840ebcfsm1042841oal.35.2023.08.18.07.06.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Aug 2023 07:06:48 -0700 (PDT) From: Adhemerval Zanella To: libc-alpha@sourceware.org, Florian Weimer Subject: [PATCH v8 1/7] arm: Add the clone3 wrapper Date: Fri, 18 Aug 2023 11:06:36 -0300 Message-Id: <20230818140642.1623571-2-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230818140642.1623571-1-adhemerval.zanella@linaro.org> References: <20230818140642.1623571-1-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 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