From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS17314 8.43.84.0/22 X-Spam-Status: No, score=-3.6 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, PDS_RDNS_DYNAMIC_FP,RCVD_IN_DNSWL_MED,RDNS_DYNAMIC,SPF_HELO_PASS, SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (ip-8-43-85-97.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 64E771F910 for ; Fri, 4 Nov 2022 19:03:50 +0000 (UTC) Authentication-Results: dcvr.yhbt.net; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.b="wOK2Pvkd"; dkim-atps=neutral Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 8E0E63857404 for ; Fri, 4 Nov 2022 19:03:49 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8E0E63857404 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1667588629; bh=HY+9TtZCCYTyiqKk/qCnx/8ZDNkrXmJ66btZ0AMHVzw=; 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=wOK2Pvkd/a9rnrjTQYCRzHzr4cvtXkfhanEimGNdNJwxiQbP+O8OP4eIWILpv7xGz Ks+KNunqyuRqDA+Hms6Uw3fLjXyCl6nANVUTfctYHBj0YJNvQ76NBJqPWtD8C8LAMH UJH5mQiE3GiuNFCiMjuWQ278b61lTA0TL5X9p888= Received: from mail-oa1-x2b.google.com (mail-oa1-x2b.google.com [IPv6:2001:4860:4864:20::2b]) by sourceware.org (Postfix) with ESMTPS id 3BD703858C2B for ; Fri, 4 Nov 2022 19:01:35 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 3BD703858C2B Received: by mail-oa1-x2b.google.com with SMTP id 586e51a60fabf-13b23e29e36so6493446fac.8 for ; Fri, 04 Nov 2022 12:01:35 -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=HY+9TtZCCYTyiqKk/qCnx/8ZDNkrXmJ66btZ0AMHVzw=; b=uC0rbhhO+/fOT3fKXCIxw0bVWdhMVRmtVN1jyT5ArsIiE3zXmAyKYV55LNXa4SNzxl SoDvZ98sMbsnbs5R0oVJ6BeJCRUkA9U8R6T5cytSsSfuABfDovGuekPFWlFtJKQGXAap RQEAMqMlTIsl0XKJ5yw30Pcd6/EuDLy2PkirL2+Gpi9r+Nr+SPc9Wdi3VMEWg1I627eb JCPVNalGbJc18h+6JNb9zk8Ul5MnQsJlBhfrAq/oH3fRM2AbEXbl9KMyXAAHkFlA4fW1 O2mvev0Vh1AUu6CKQH3I95EHGIWq4JsWSFMb+bZ5YbKH4BzwbObO3J5xM000SEM+X5hy KqoQ== X-Gm-Message-State: ANoB5plMnnctUYYdqcoWte72iPAtQ/Xd3gzFzAUxQw17xfUB1ysFEg3H 2Q9trEpdCjm5kFt1ZMBsaPYyhj7lZwhMJN3P X-Google-Smtp-Source: AA0mqf4EcCfrhDSHb6D37hFL3SBNP/gHY05kTTTMsw2vyk2rbSqOQlME2tEwYO+frdb7qKqa0uCnZw== X-Received: by 2002:a05:6870:d352:b0:140:816d:c1f9 with SMTP id h18-20020a056870d35200b00140816dc1f9mr1913181oag.231.1667588494403; Fri, 04 Nov 2022 12:01:34 -0700 (PDT) Received: from mandiga.. ([2804:1b3:a7c0:a9f4:f725:94bd:4cc1:1762]) by smtp.gmail.com with ESMTPSA id 24-20020aca1018000000b0035763a9a36csm1764713oiq.44.2022.11.04.12.01.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Nov 2022 12:01:34 -0700 (PDT) To: libc-alpha@sourceware.org, Szabolcs Nagy , "H . J . Lu" Subject: [PATCH v2 10/11] mips: Add the clone3 wrapper Date: Fri, 4 Nov 2022 16:01:11 -0300 Message-Id: <20221104190112.2566409-11-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 Content-Transfer-Encoding: 8bit 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: , From: Adhemerval Zanella via Libc-alpha Reply-To: Adhemerval Zanella Cc: Christian Brauner Errors-To: libc-alpha-bounces+e=80x24.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 mips64el-linux-gnueabihf and mipsel-linux-gnu. --- sysdeps/unix/sysv/linux/mips/clone3.S | 139 ++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/mips/sysdep.h | 2 + 2 files changed, 141 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/mips/clone3.S diff --git a/sysdeps/unix/sysv/linux/mips/clone3.S b/sysdeps/unix/sysv/linux/mips/clone3.S new file mode 100644 index 0000000000..7810994264 --- /dev/null +++ b/sysdeps/unix/sysv/linux/mips/clone3.S @@ -0,0 +1,139 @@ +/* The clone3 syscall wrapper. Linux/mips 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 +#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: + a0/$4: cl_args + a1/$5: size + a2/$6: func + a3/$7: arg */ + + .text + .set nomips16 +#if _MIPS_SIM == _ABIO32 +# define EXTRA_LOCALS 1 +#else +# define EXTRA_LOCALS 0 +#endif +#define FRAMESZ ((NARGSAVE*SZREG)+ALSZ)&ALMASK +GPOFF= FRAMESZ-(1*SZREG) +NESTED(__clone3, SZREG, sp) +#ifdef __PIC__ + SETUP_GP +#endif +#if FRAMESZ + PTR_SUBU sp, FRAMESZ + cfi_adjust_cfa_offset (FRAMESZ) +#endif + SETUP_GP64_STACK (GPOFF, __clone) +#ifdef __PIC__ + SAVE_GP (GPOFF) +#endif +#ifdef PROF + .set noat + move $1,ra + jal _mcount + .set at +#endif + + /* Sanity check args. */ + li v0, EINVAL + beqz a0, L(error) /* No NULL cl_args pointer. */ + beqz a2, L(error) /* No NULL function pointer. */ + + move $8, a3 /* a3 is set to 0/1 for syscall success/error + while a4/$8 is returned unmodified. */ + + /* Do the system call, the kernel expects: + v0: system call number + a0: cl_args + a1: size */ + li v0, __NR_clone3 + cfi_endproc + syscall + + bnez a3, L(error) + beqz v0, L(thread_start_clone3) + + /* Successful return from the parent */ + cfi_startproc +#if FRAMESZ + cfi_adjust_cfa_offset (FRAMESZ) +#endif + SETUP_GP64_STACK_CFI (GPOFF) + cfi_remember_state + RESTORE_GP64_STACK +#if FRAMESZ + PTR_ADDU sp, FRAMESZ + cfi_adjust_cfa_offset (-FRAMESZ) +#endif + ret + +L(error): + cfi_restore_state +#ifdef __PIC__ + PTR_LA t9,__syscall_error + RESTORE_GP64_STACK + PTR_ADDU sp, FRAMESZ + cfi_adjust_cfa_offset (-FRAMESZ) + jr t9 +#else + RESTORE_GP64_STACK + PTR_ADDU sp, FRAMESZ + cfi_adjust_cfa_offset (-FRAMESZ) + j __syscall_error +#endif +END (__clone3) + +/* Load up the arguments to the function. Put this block of code in + its own function so that we can terminate the stack trace with our + debug info. */ + +ENTRY(__thread_start_clone3) +L(thread_start_clone3): + cfi_undefined ($31) + /* cp is already loaded. */ + SAVE_GP (GPOFF) + /* The stackframe has been created on entry of clone3. */ + + /* Restore the arg for user's function. */ + move t9, a2 /* Function pointer. */ + move a0, $8 /* Argument pointer. */ + + /* Call the user's function. */ + jal t9 + + move a0, v0 + li v0, __NR_exit + syscall +END(__thread_start_clone3) + +libc_hidden_def (__clone3) +weak_alias (__clone3, clone3) diff --git a/sysdeps/unix/sysv/linux/mips/sysdep.h b/sysdeps/unix/sysv/linux/mips/sysdep.h index 2515dadc26..3f464925e7 100644 --- a/sysdeps/unix/sysv/linux/mips/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/sysdep.h @@ -28,3 +28,5 @@ #endif #define HAVE_GETTIMEOFDAY_VSYSCALL "__vdso_gettimeofday" #define HAVE_CLOCK_GETRES_VSYSCALL "__vdso_clock_getres" + +#define HAVE_CLONE3_WRAPPER 1 -- 2.34.1