11.10Sriastrad/* $NetBSD: _lwp.c,v 1.10 2025/04/27 16:15:40 riastradh Exp $ */ 21.2Sthorpej 31.2Sthorpej/*- 41.2Sthorpej * Copyright (c) 2001 The NetBSD Foundation, Inc. 51.2Sthorpej * All rights reserved. 61.2Sthorpej * 71.2Sthorpej * This code is derived from software contributed to The NetBSD Foundation 81.2Sthorpej * by Nathan J. Williams. 91.2Sthorpej * 101.2Sthorpej * Redistribution and use in source and binary forms, with or without 111.2Sthorpej * modification, are permitted provided that the following conditions 121.2Sthorpej * are met: 131.2Sthorpej * 1. Redistributions of source code must retain the above copyright 141.2Sthorpej * notice, this list of conditions and the following disclaimer. 151.2Sthorpej * 2. Redistributions in binary form must reproduce the above copyright 161.2Sthorpej * notice, this list of conditions and the following disclaimer in the 171.2Sthorpej * documentation and/or other materials provided with the distribution. 181.2Sthorpej * 191.2Sthorpej * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.2Sthorpej * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.2Sthorpej * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.2Sthorpej * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.2Sthorpej * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.2Sthorpej * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.2Sthorpej * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.2Sthorpej * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.2Sthorpej * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.2Sthorpej * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.2Sthorpej * POSSIBILITY OF SUCH DAMAGE. 301.2Sthorpej */ 311.2Sthorpej 321.4Slukem#include <sys/cdefs.h> 331.4Slukem#if defined(LIBC_SCCS) && !defined(lint) 341.10Sriastrad__RCSID("$NetBSD: _lwp.c,v 1.10 2025/04/27 16:15:40 riastradh Exp $"); 351.4Slukem#endif /* LIBC_SCCS and not lint */ 361.4Slukem 371.3Skleink#include "namespace.h" 381.9Sriastrad 391.10Sriastrad#include <sys/param.h> 401.2Sthorpej#include <sys/types.h> 411.9Sriastrad 421.2Sthorpej#include <lwp.h> 431.2Sthorpej#include <stdlib.h> 441.9Sriastrad#include <ucontext.h> 451.2Sthorpej 461.2Sthorpejvoid 471.2Sthorpej_lwp_makecontext(ucontext_t *u, void (*start)(void *), 481.2Sthorpej void *arg, void *private, caddr_t stack_base, size_t stack_size) 491.2Sthorpej{ 501.2Sthorpej __greg_t *gr; 511.2Sthorpej 521.2Sthorpej getcontext(u); 531.2Sthorpej gr = u->uc_mcontext.__gregs; 541.2Sthorpej 551.2Sthorpej u->uc_link = NULL; 561.2Sthorpej 571.2Sthorpej u->uc_stack.ss_sp = stack_base; 581.2Sthorpej u->uc_stack.ss_size = stack_size; 591.2Sthorpej 601.2Sthorpej gr[_REG_PC] = (unsigned long)start; 611.2Sthorpej gr[_REG_T12] = (unsigned long) start; 621.2Sthorpej gr[_REG_RA] = (unsigned long) _lwp_exit; 631.2Sthorpej gr[_REG_A0] = (unsigned long) arg; 641.10Sriastrad gr[_REG_SP] = ((unsigned long) (stack_base + stack_size)) & 651.10Sriastrad ~STACK_ALIGNBYTES; 661.2Sthorpej gr[_REG_S6] = 0; 671.6Sjoerg gr[_REG_UNIQUE] = (unsigned long)private; 681.6Sjoerg 691.7Smanu u->uc_flags |= _UC_TLSBASE; 701.2Sthorpej} 71