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/* $OpenBSD: uthread_machdep.c,v 1.3 2003/01/31 04:46:16 marc Exp $ */
/*
* Machine-dependent thread state functions for OpenBSD/sparc.
*/
#include <machine/frame.h>
#include <machine/param.h>
#include <pthread.h>
#include "pthread_private.h"
extern void _thread_machdep_fpsave(u_int32_t *, u_int64_t *);
extern void _thread_machdep_fprestore(u_int32_t *, u_int64_t *);
/*
* 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->fr_fp = (struct frame *)-1; /* purposefully misaligned */
f->fr_pc = -1; /* for gdb */
statep->fp = (int)f;
statep->pc = -8 + (int)entry;
}
void
_thread_machdep_save_float_state(statep)
struct _machdep_state* statep;
{
_thread_machdep_fpsave(&statep->fs_csr, &statep->fs_regs[0]);
}
void
_thread_machdep_restore_float_state(statep)
struct _machdep_state* statep;
{
_thread_machdep_fprestore(&statep->fs_csr, &statep->fs_regs[0]);
}
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