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
|
/* $OpenBSD: uthread_machdep_asm.S,v 1.2 2004/03/02 23:41:29 miod 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.
*/
#include <machine/asm.h>
/*
* void _thread_machdep_switch(new, oldsave);
*/
ENTRY(_thread_machdep_switch)
subu r31, r31, 4 * 28
/* save all registers but r0, r2, r3 and r31 on stack */
st.d r4, r31, 4 * 0
st.d r6, r31, 4 * 2
st.d r8, r31, 4 * 4
st.d r10, r31, 4 * 6
st.d r12, r31, 4 * 8
st.d r14, r31, 4 * 10
st.d r16, r31, 4 * 12
st.d r18, r31, 4 * 14
st.d r20, r31, 4 * 16
st.d r22, r31, 4 * 18
st.d r24, r31, 4 * 20
st.d r26, r31, 4 * 22
st.d r28, r31, 4 * 24
st r30, r31, 4 * 26
st r1, r31, 4 * 27
/* exchange stacks */
st r31, r3, 0 /* oldsave->frame = r31 */
ld r31, r2, 0 /* r31 = oldsave->frame */
/* restore registers */
ld.d r4, r31, 4 * 0
ld.d r6, r31, 4 * 2
ld.d r8, r31, 4 * 4
ld.d r10, r31, 4 * 6
ld.d r12, r31, 4 * 8
ld.d r14, r31, 4 * 10
ld.d r16, r31, 4 * 12
ld.d r18, r31, 4 * 14
ld.d r20, r31, 4 * 16
ld.d r22, r31, 4 * 18
ld.d r24, r31, 4 * 20
ld.d r26, r31, 4 * 22
ld.d r28, r31, 4 * 24
ld r30, r31, 4 * 26
ld r1, r31, 4 * 27
jmp.n r1
addu r31, r31, 4 * 28
|
