137 lines
4.8 KiB
C
137 lines
4.8 KiB
C
/* ==== machdep.c ============================================================
|
|
* Copyright (c) 1993, 1994 Chris Provenzano, proven@athena.mit.edu
|
|
*
|
|
* Copyright (c) 1993 by Chris Provenzano, proven@mit.edu
|
|
* All rights reserved.
|
|
*
|
|
* 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 by Chris Provenzano.
|
|
* 4. The name of Chris Provenzano may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
|
|
*
|
|
* Description : Machine dependent functions for NetBSD on i386
|
|
*
|
|
* 1.00 93/08/04 proven
|
|
* -Started coding this file.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] = "$Id: machdep.c,v 1.3 1994/02/07 22:00:44 proven Exp $";
|
|
#endif
|
|
|
|
#include "pthread.h"
|
|
|
|
/* ==========================================================================
|
|
* machdep_save_state()
|
|
*/
|
|
int machdep_save_state(void)
|
|
{
|
|
return(_setjmp(pthread_run->machdep_data.machdep_state));
|
|
}
|
|
|
|
/* ==========================================================================
|
|
* machdep_restore_state()
|
|
*/
|
|
void machdep_restore_state(void)
|
|
{
|
|
_longjmp(pthread_run->machdep_data.machdep_state, 1);
|
|
}
|
|
|
|
/* ==========================================================================
|
|
* machdep_set_thread_timer()
|
|
*/
|
|
void machdep_set_thread_timer(struct machdep_pthread *machdep_pthread)
|
|
{
|
|
if (setitimer(ITIMER_VIRTUAL, &(machdep_pthread->machdep_timer), NULL)) {
|
|
PANIC();
|
|
}
|
|
}
|
|
|
|
/* ==========================================================================
|
|
* machdep_unset_thread_timer()
|
|
*/
|
|
void machdep_unset_thread_timer(struct machdep_pthread *machdep_pthread)
|
|
{
|
|
struct itimerval zeroval = { { 0, 0 }, { 0, 0} };
|
|
|
|
if (setitimer(ITIMER_VIRTUAL, &zeroval, NULL)) {
|
|
PANIC();
|
|
}
|
|
}
|
|
|
|
/* ==========================================================================
|
|
* machdep_pthread_cleanup()
|
|
*/
|
|
void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread)
|
|
{
|
|
return(machdep_pthread->machdep_stack);
|
|
}
|
|
|
|
/* ==========================================================================
|
|
* machdep_pthread_start()
|
|
*/
|
|
void machdep_pthread_start(void)
|
|
{
|
|
context_switch_done();
|
|
sig_check_and_resume();
|
|
|
|
/* Run current threads start routine with argument */
|
|
pthread_exit(pthread_run->machdep_data.start_routine
|
|
(pthread_run->machdep_data.start_argument));
|
|
|
|
/* should never reach here */
|
|
PANIC();
|
|
}
|
|
|
|
/* ==========================================================================
|
|
* machdep_pthread_create()
|
|
*/
|
|
void machdep_pthread_create(struct machdep_pthread *machdep_pthread,
|
|
void *(* start_routine)(), void *start_argument, long stack_size,
|
|
void *stack_start, long nsec)
|
|
{
|
|
machdep_pthread->machdep_stack = stack_start;
|
|
|
|
machdep_pthread->start_routine = start_routine;
|
|
machdep_pthread->start_argument = start_argument;
|
|
|
|
machdep_pthread->machdep_timer.it_value.tv_sec = 0;
|
|
machdep_pthread->machdep_timer.it_interval.tv_sec = 0;
|
|
machdep_pthread->machdep_timer.it_interval.tv_usec = 0;
|
|
machdep_pthread->machdep_timer.it_value.tv_usec = nsec / 1000;
|
|
|
|
_setjmp(machdep_pthread->machdep_state);
|
|
/*
|
|
* Set up new stact frame so that it looks like it
|
|
* returned from a longjmp() to the beginning of
|
|
* machdep_pthread_start().
|
|
*/
|
|
machdep_pthread->machdep_state[0] = (int)machdep_pthread_start;
|
|
|
|
/* Stack starts high and builds down. */
|
|
machdep_pthread->machdep_state[2] =
|
|
(int)machdep_pthread->machdep_stack + stack_size;
|
|
}
|