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/* $OpenBSD: uthread_machdep.c,v 1.2 2003/06/02 08:11:15 miod Exp $ */
/* David Leonard, <d@csee.uq.edu.au>. Public domain. */
/*
* Machine-dependent thread state functions for OpenBSD/m68k
*/
#include <pthread.h>
#include "pthread_private.h"
#define ALIGNBYTES 0x3
struct frame {
int d2,d3,d4,d5,d6,d7;
int a2,a3,a4,a5,fp;
int link; /* frame link */
int ra;
};
/*
* Given a stack and an entry function, initialise a state
* structure that can be later switched to.
*/
void
_thread_machdep_init(statep, base, len, entry)
struct _machdep_state* statep;
void *base;
int len;
void (*entry)(void);
{
struct frame *f;
/* Locate the initial frame, aligned at the top of the stack */
f = (struct frame *)(((int)base + len - sizeof *f) & ~ALIGNBYTES);
f->ra = (int)entry;
f->link = 0;
f->fp = (int)&f->link;
statep->sp = (int)f;
}
void
_thread_machdep_save_float_state(statep)
struct _machdep_state* statep;
{
/* fsave is a privileged instruction */
}
void
_thread_machdep_restore_float_state(statep)
struct _machdep_state* statep;
{
/* frestore is a privileged instruction */
}
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