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/* ==== machdep.c ============================================================
* Copyright (c) 1993, 1994 Chris Provenzano, proven@athena.mit.edu
*
* Description : Machine dependent functions for SunOS-4.1.3 on sparc
*
* 1.00 93/08/04 proven
* -Started coding this file.
*/
#ifndef lint
static const char rcsid[] = "$Id$";
#endif
#include <pthread.h>
#include <stdlib.h>
/* These would be defined in setjmp.h, if _POSIX_SOURCE and _XOPEN_SOURCE
were both undefined. But we've already included it, and lost the
opportunity. */
#define JB_PC 2
#define JB_RA 30
#define JB_PV 31
#define JB_SP 34
/* ==========================================================================
* machdep_save_state()
*/
int machdep_save_state(void)
{
return setjmp (pthread_run->machdep_data.machdep_state);
}
/* ==========================================================================
* machdep_restore_state()
*/
extern void machdep_restore_from_setjmp (jmp_buf, long);
void machdep_restore_state(void)
{
machdep_restore_from_setjmp (pthread_run->machdep_data.machdep_state, 1);
}
void machdep_save_float_state (void) { }
void machdep_restore_float_state (void) { }
/* ==========================================================================
* 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();
pthread_sched_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_stack_free()
*/
void __machdep_stack_free(void * stack)
{
free(stack);
}
/* ==========================================================================
* __machdep_stack_alloc()
*/
void * __machdep_stack_alloc(size_t size)
{
void * stack;
return(malloc(size));
}
/* ==========================================================================
* __machdep_pthread_create()
*/
void __machdep_pthread_create(struct machdep_pthread *machdep_pthread,
void *(* start_routine)(), void *start_argument,
long stack_size, long nsec, long flags)
{
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 stack frame so that it looks like it returned from a
longjmp() to the beginning of machdep_pthread_start(). */
machdep_pthread->machdep_state[JB_RA] = 0;
machdep_pthread->machdep_state[JB_PC] = (long)machdep_pthread_start;
machdep_pthread->machdep_state[JB_PV] = (long)machdep_pthread_start;
/* Alpha stack starts high and builds down. */
{
long stk_addr = (long) machdep_pthread->machdep_stack;
stk_addr += stack_size - 1024;
stk_addr &= ~15;
machdep_pthread->machdep_state[JB_SP] = stk_addr;
}
}
/* ==========================================================================
* machdep_sys_wait3()
*/
machdep_sys_wait3(int * b, int c, int * d)
{
return(machdep_sys_wait4(0, b, c, d));
}
/* ==========================================================================
* machdep_sys_waitpid()
*/
machdep_sys_waitpid(int pid, int * statusp, int options)
{
return machdep_sys_wait4 (pid, statusp, options, NULL);
}
/* These are found in flsbuf.o in the Alpha libc. I don't know what
they're for, precisely. */
static xxx;
_bufsync (p)
char *p;
{
long a1 = *(long *)(p+48);
long t0 = *(long *)(p+8);
long v0 = a1 - t0;
long t1, t2;
abort ();
v0 += xxx;
if (v0 < 0)
{
*(char**)(p + 8) = p;
return v0;
}
t1 = *(int*)p;
t2 = v0 - t1;
if (t2 < 0)
*(int*)p = (int) v0;
return v0;
}
_findbuf () { abort (); }
_wrtchk () { abort (); }
_xflsbuf () { abort (); }
_flsbuf () { abort (); }
void __xxx_never_called () {
/* Force other stuff to get dragged in. */
_cleanup ();
fflush (NULL);
fclose (NULL);
}
int safe_store (loc, new)
int *loc;
int new;
{
int locked, old;
asm ("mb" : : : "memory");
do {
asm ("ldl_l %0,%1" : "=r" (old) : "m" (*loc));
asm ("stl_c %0,%1" : "=r" (locked), "=m" (*loc) : "0" (new));
} while (!locked);
asm ("mb" : : : "memory");
return old;
}
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