2003-04-08 01:04:20 +04:00
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/* $NetBSD: _lwp.c,v 1.3 2003/04/07 21:04:22 kleink Exp $ */
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2003-01-18 13:52:16 +03:00
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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2003-04-08 01:04:20 +04:00
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#include "namespace.h"
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2003-01-18 13:52:16 +03:00
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#include <sys/types.h>
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#include <ucontext.h>
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#include <lwp.h>
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#include <stdlib.h>
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void
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_lwp_makecontext(ucontext_t *u, void (*start)(void *),
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void *arg, void *private,
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caddr_t stack_base, size_t stack_size)
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{
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__greg_t *gr;
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unsigned long *sp;
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getcontext(u);
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gr = u->uc_mcontext.__gregs;
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u->uc_link = NULL;
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u->uc_stack.ss_sp = stack_base;
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u->uc_stack.ss_size = stack_size;
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sp = (ulong *)(stack_base + stack_size);
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sp = (ulong *)((ulong)sp & ~0x0f);
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sp -= 8 + 8 + 6;
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sp[8] = (ulong)arg;
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sp[14] = (ulong)sp - 2047;
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sp[15] = (ulong)_lwp_exit - 8;
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sp = (ulong *)((caddr_t)sp - 2047);
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gr[_REG_PC] = (ulong) start;
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gr[_REG_nPC] = (ulong) start + 4;
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gr[_REG_O0] = (ulong) arg;
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gr[_REG_O6] = (ulong) sp;
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gr[_REG_O7] = (ulong)_lwp_exit - 8;
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}
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