72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
|
/* $NetBSD: _lwp.c,v 1.4 2005/06/12 05:21:25 lukem Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2001 Wasabi Systems, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
|
* must display the following acknowledgement:
|
||
|
|
* This product includes software developed for the NetBSD Project by
|
||
|
|
* Wasabi Systems, Inc.
|
||
|
|
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||
|
|
* or promote products derived from this software without specific prior
|
||
|
|
* written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
|
||
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
||
|
|
__RCSID("$NetBSD: _lwp.c,v 1.4 2005/06/12 05:21:25 lukem Exp $");
|
||
|
|
#endif /* LIBC_SCCS and not lint */
|
||
|
|
|
||
|
|
#include "namespace.h"
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <ucontext.h>
|
||
|
|
#include <lwp.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
void
|
||
|
|
_lwp_makecontext(ucontext_t *u, void (*start)(void *),
|
||
|
|
void *arg, void *private, caddr_t stack_base, size_t stack_size)
|
||
|
|
{
|
||
|
|
void **sp;
|
||
|
|
|
||
|
|
getcontext(u);
|
||
|
|
u->uc_link = NULL;
|
||
|
|
|
||
|
|
u->uc_stack.ss_sp = stack_base;
|
||
|
|
u->uc_stack.ss_size = stack_size;
|
||
|
|
|
||
|
|
sp = (void **) (stack_base + stack_size);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Note: We make sure the stack is 8-byte aligned, here.
|
||
|
|
*/
|
||
|
|
|
||
|
|
u->uc_mcontext.__gregs[_REG_R0] = (__greg_t) arg;
|
||
|
|
u->uc_mcontext.__gregs[_REG_SP] = ((__greg_t) sp) & ~7;
|
||
|
|
u->uc_mcontext.__gregs[_REG_LR] = (__greg_t) _lwp_exit;
|
||
|
|
u->uc_mcontext.__gregs[_REG_PC] = (__greg_t) start;
|
||
|
|
}
|