1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/* $OpenBSD: uthread_machdep.c,v 1.1 2004/02/27 22:19:46 deraadt Exp $ */
/*
* Copyright (c) 2004 Theo de Raadt
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Machine-dependent thread state functions for m88k
*/
#include <pthread.h>
#include "pthread_private.h"
#define ALIGNBYTES 7
struct frame {
long regs[30];
};
/*
* 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;
f = (struct frame *)(((u_int32_t)base + len - sizeof *f) & ~ALIGNBYTES);
f->regs[29] = f->regs[27] = (u_int32_t)entry;
statep->sp = (int)f;
}
void
_thread_machdep_save_float_state(statep)
struct _machdep_state* statep;
{
int fpreg;
__asm__ __volatile__ ("fldcr %0, fcr62" : "=r" (fpreg));
statep->fpsr = fpreg;
__asm__ __volatile__ ("fldcr %0, fcr63" : "=r" (fpreg));
statep->fpcr = fpreg;
}
void
_thread_machdep_restore_float_state(statep)
struct _machdep_state* statep;
{
int fpreg;
fpreg = statep->fpsr;
__asm__ __volatile__ ("fstcr %0, fcr62" : : "r" (fpreg));
fpreg = statep->fpcr;
__asm__ __volatile__ ("fstcr %0, fcr63" : : "r" (fpreg));
}
|
