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      1 /*	$NetBSD: pthread_makelwp_netbsd.c,v 1.3 2022/02/12 14:59:32 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001, 2002, 2003, 2006, 2007, 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nathan J. Williams and Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __RCSID("$NetBSD: pthread_makelwp_netbsd.c,v 1.3 2022/02/12 14:59:32 riastradh Exp $");
     34 
     35 /* Need to use libc-private names for atomic operations. */
     36 #include "../../common/lib/libc/atomic/atomic_op_namespace.h"
     37 
     38 #include <sys/param.h>
     39 
     40 #include <lwp.h>
     41 #include <pthread.h>
     42 #include <string.h>
     43 
     44 #include "pthread_int.h"
     45 #include "pthread_makelwp.h"
     46 
     47 int
     48 pthread__makelwp(void (*start_routine)(void *), void *arg, void *priv,
     49 	void *stack_base, size_t stack_size,
     50 	unsigned long flag, lwpid_t *newlid)
     51 {
     52 	ucontext_t uc;
     53 
     54 	/*
     55 	 * XXX: most of the following chunk is these days
     56 	 * performed also by _lwp_makecontext(), but there may
     57 	 * be MD differences, so lug everything along for now.
     58 	 */
     59 	memset(&uc, 0, sizeof(uc));
     60 	_INITCONTEXT_U(&uc);
     61 	uc.uc_stack.ss_sp = stack_base;
     62 	uc.uc_stack.ss_size = stack_size;
     63 	uc.uc_stack.ss_flags = 0;
     64 	uc.uc_link = NULL;
     65 
     66 	_lwp_makecontext(&uc, start_routine, arg, priv, stack_base, stack_size);
     67 	return _lwp_create(&uc, flag, newlid);
     68 }
     69