summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/xmon/setjmp.S
blob: 96a91f10e2ec52ed5e05f3cdda3841e37c5fd61a (plain)
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/*
 * Copyright (C) 1996 Paul Mackerras.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 * NOTE: assert(sizeof(buf) > 23 * sizeof(long))
 */
#include <asm/processor.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>

_GLOBAL(xmon_setjmp)
	mflr	r0
	PPC_STL	r0,0(r3)
	PPC_STL	r1,SZL(r3)
	PPC_STL	r2,2*SZL(r3)
	mfcr	r0
	PPC_STL	r0,3*SZL(r3)
	PPC_STL	r13,4*SZL(r3)
	PPC_STL	r14,5*SZL(r3)
	PPC_STL	r15,6*SZL(r3)
	PPC_STL	r16,7*SZL(r3)
	PPC_STL	r17,8*SZL(r3)
	PPC_STL	r18,9*SZL(r3)
	PPC_STL	r19,10*SZL(r3)
	PPC_STL	r20,11*SZL(r3)
	PPC_STL	r21,12*SZL(r3)
	PPC_STL	r22,13*SZL(r3)
	PPC_STL	r23,14*SZL(r3)
	PPC_STL	r24,15*SZL(r3)
	PPC_STL	r25,16*SZL(r3)
	PPC_STL	r26,17*SZL(r3)
	PPC_STL	r27,18*SZL(r3)
	PPC_STL	r28,19*SZL(r3)
	PPC_STL	r29,20*SZL(r3)
	PPC_STL	r30,21*SZL(r3)
	PPC_STL	r31,22*SZL(r3)
	li	r3,0
	blr

_GLOBAL(xmon_longjmp)
	PPC_LCMPI r4,0
	bne	1f
	li	r4,1
1:	PPC_LL	r13,4*SZL(r3)
	PPC_LL	r14,5*SZL(r3)
	PPC_LL	r15,6*SZL(r3)
	PPC_LL	r16,7*SZL(r3)
	PPC_LL	r17,8*SZL(r3)
	PPC_LL	r18,9*SZL(r3)
	PPC_LL	r19,10*SZL(r3)
	PPC_LL	r20,11*SZL(r3)
	PPC_LL	r21,12*SZL(r3)
	PPC_LL	r22,13*SZL(r3)
	PPC_LL	r23,14*SZL(r3)
	PPC_LL	r24,15*SZL(r3)
	PPC_LL	r25,16*SZL(r3)
	PPC_LL	r26,17*SZL(r3)
	PPC_LL	r27,18*SZL(r3)
	PPC_LL	r28,19*SZL(r3)
	PPC_LL	r29,20*SZL(r3)
	PPC_LL	r30,21*SZL(r3)
	PPC_LL	r31,22*SZL(r3)
	PPC_LL	r0,3*SZL(r3)
	mtcrf	0x38,r0
	PPC_LL	r0,0(r3)
	PPC_LL	r1,SZL(r3)
	PPC_LL	r2,2*SZL(r3)
	mtlr	r0
	mr	r3,r4
	blr

/*
 * Grab the register values as they are now.
 * This won't do a particularily good job because we really
 * want our caller's caller's registers, and our caller has
 * already executed its prologue.
 * ToDo: We could reach back into the caller's save area to do
 * a better job of representing the caller's state (note that
 * that will be different for 32-bit and 64-bit, because of the
 * different ABIs, though).
 */
_GLOBAL(xmon_save_regs)
	PPC_STL	r0,0*SZL(r3)
	PPC_STL	r2,2*SZL(r3)
	PPC_STL	r3,3*SZL(r3)
	PPC_STL	r4,4*SZL(r3)
	PPC_STL	r5,5*SZL(r3)
	PPC_STL	r6,6*SZL(r3)
	PPC_STL	r7,7*SZL(r3)
	PPC_STL	r8,8*SZL(r3)
	PPC_STL	r9,9*SZL(r3)
	PPC_STL	r10,10*SZL(r3)
	PPC_STL	r11,11*SZL(r3)
	PPC_STL	r12,12*SZL(r3)
	PPC_STL	r13,13*SZL(r3)
	PPC_STL	r14,14*SZL(r3)
	PPC_STL	r15,15*SZL(r3)
	PPC_STL	r16,16*SZL(r3)
	PPC_STL	r17,17*SZL(r3)
	PPC_STL	r18,18*SZL(r3)
	PPC_STL	r19,19*SZL(r3)
	PPC_STL	r20,20*SZL(r3)
	PPC_STL	r21,21*SZL(r3)
	PPC_STL	r22,22*SZL(r3)
	PPC_STL	r23,23*SZL(r3)
	PPC_STL	r24,24*SZL(r3)
	PPC_STL	r25,25*SZL(r3)
	PPC_STL	r26,26*SZL(r3)
	PPC_STL	r27,27*SZL(r3)
	PPC_STL	r28,28*SZL(r3)
	PPC_STL	r29,29*SZL(r3)
	PPC_STL	r30,30*SZL(r3)
	PPC_STL	r31,31*SZL(r3)
	/* go up one stack frame for SP */
	PPC_LL	r4,0(r1)
	PPC_STL	r4,1*SZL(r3)
	/* get caller's LR */
	PPC_LL	r0,LRSAVE(r4)
	PPC_STL	r0,_NIP-STACK_FRAME_OVERHEAD(r3)
	PPC_STL	r0,_LINK-STACK_FRAME_OVERHEAD(r3)
	mfmsr	r0
	PPC_STL	r0,_MSR-STACK_FRAME_OVERHEAD(r3)
	mfctr	r0
	PPC_STL	r0,_CTR-STACK_FRAME_OVERHEAD(r3)
	mfxer	r0
	PPC_STL	r0,_XER-STACK_FRAME_OVERHEAD(r3)
	mfcr	r0
	PPC_STL	r0,_CCR-STACK_FRAME_OVERHEAD(r3)
	li	r0,0
	PPC_STL	r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
	blr