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1 | /* | |
2 | Copyright Oliver Kowalke 2009. | |
3 | Distributed under the Boost Software License, Version 1.0. | |
4 | (See accompanying file LICENSE_1_0.txt or copy at | |
5 | http://www.boost.org/LICENSE_1_0.txt) | |
6 | */ | |
7 | ||
8 | /****************************************************** | |
9 | * * | |
10 | * ------------------------------------------------- * | |
11 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * | |
12 | * ------------------------------------------------- * | |
13 | * | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | * | |
14 | * ------------------------------------------------- * | |
15 | * | F14 | F15 | F16 | F17 | * | |
16 | * ------------------------------------------------- * | |
17 | * ------------------------------------------------- * | |
18 | * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * | |
19 | * ------------------------------------------------- * | |
20 | * | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | * | |
21 | * ------------------------------------------------- * | |
22 | * | F18 | F19 | F20 | F21 | * | |
23 | * ------------------------------------------------- * | |
24 | * ------------------------------------------------- * | |
25 | * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | * | |
26 | * ------------------------------------------------- * | |
27 | * | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | * | |
28 | * ------------------------------------------------- * | |
29 | * | F22 | F23 | F24 | F25 | * | |
30 | * ------------------------------------------------- * | |
31 | * ------------------------------------------------- * | |
32 | * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | * | |
33 | * ------------------------------------------------- * | |
34 | * | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | * | |
35 | * ------------------------------------------------- * | |
36 | * | F26 | F27 | F28 | F29 | * | |
37 | * ------------------------------------------------- * | |
38 | * ------------------------------------------------- * | |
39 | * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | * | |
40 | * ------------------------------------------------- * | |
41 | * | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | * | |
42 | * ------------------------------------------------- * | |
43 | * | F30 | F31 | fpscr | R13 | R14 | * | |
44 | * ------------------------------------------------- * | |
45 | * ------------------------------------------------- * | |
46 | * | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | * | |
47 | * ------------------------------------------------- * | |
48 | * | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 | * | |
49 | * ------------------------------------------------- * | |
50 | * | R15 | R16 | R17 | R18 | R19 | R20 | R21 | R22 | * | |
51 | * ------------------------------------------------- * | |
52 | * ------------------------------------------------- * | |
53 | * | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | * | |
54 | * ------------------------------------------------- * | |
55 | * | 192 | 196 | 200 | 204 | 208 | 212 | 216 | 220 | * | |
56 | * ------------------------------------------------- * | |
57 | * | R23 | R24 | R25 | R26 | R27 | R28 | R29 | R30 | * | |
58 | * ------------------------------------------------- * | |
59 | * ------------------------------------------------- * | |
60 | * | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | * | |
61 | * ------------------------------------------------- * | |
62 | * | 224 | 228 | 232 | 236 | 240 | 244 | 248 | 252 | * | |
63 | * ------------------------------------------------- * | |
64 | * | R31 |hiddn| CR | LR | PC |bchai|linkr| FCTX| * | |
65 | * ------------------------------------------------- * | |
66 | * ------------------------------------------------- * | |
67 | * | 64 | | * | |
68 | * ------------------------------------------------- * | |
69 | * | 256 | | * | |
70 | * ------------------------------------------------- * | |
71 | * | DATA| | * | |
72 | * ------------------------------------------------- * | |
73 | * * | |
74 | *******************************************************/ | |
75 | ||
76 | .text | |
77 | .globl jump_fcontext | |
78 | .align 2 | |
79 | .type jump_fcontext,@function | |
80 | jump_fcontext: | |
81 | # reserve space on stack | |
82 | subi %r1, %r1, 244 | |
83 | ||
84 | stfd %f14, 0(%r1) # save F14 | |
85 | stfd %f15, 8(%r1) # save F15 | |
86 | stfd %f16, 16(%r1) # save F16 | |
87 | stfd %f17, 24(%r1) # save F17 | |
88 | stfd %f18, 32(%r1) # save F18 | |
89 | stfd %f19, 40(%r1) # save F19 | |
90 | stfd %f20, 48(%r1) # save F20 | |
91 | stfd %f21, 56(%r1) # save F21 | |
92 | stfd %f22, 64(%r1) # save F22 | |
93 | stfd %f23, 72(%r1) # save F23 | |
94 | stfd %f24, 80(%r1) # save F24 | |
95 | stfd %f25, 88(%r1) # save F25 | |
96 | stfd %f26, 96(%r1) # save F26 | |
97 | stfd %f27, 104(%r1) # save F27 | |
98 | stfd %f28, 112(%r1) # save F28 | |
99 | stfd %f29, 120(%r1) # save F29 | |
100 | stfd %f30, 128(%r1) # save F30 | |
101 | stfd %f31, 136(%r1) # save F31 | |
102 | mffs %f0 # load FPSCR | |
103 | stfd %f0, 144(%r1) # save FPSCR | |
104 | ||
105 | stw %r13, 152(%r1) # save R13 | |
106 | stw %r14, 156(%r1) # save R14 | |
107 | stw %r15, 160(%r1) # save R15 | |
108 | stw %r16, 164(%r1) # save R16 | |
109 | stw %r17, 168(%r1) # save R17 | |
110 | stw %r18, 172(%r1) # save R18 | |
111 | stw %r19, 176(%r1) # save R19 | |
112 | stw %r20, 180(%r1) # save R20 | |
113 | stw %r21, 184(%r1) # save R21 | |
114 | stw %r22, 188(%r1) # save R22 | |
115 | stw %r23, 192(%r1) # save R23 | |
116 | stw %r24, 196(%r1) # save R24 | |
117 | stw %r25, 200(%r1) # save R25 | |
118 | stw %r26, 204(%r1) # save R26 | |
119 | stw %r27, 208(%r1) # save R27 | |
120 | stw %r28, 212(%r1) # save R28 | |
121 | stw %r29, 216(%r1) # save R29 | |
122 | stw %r30, 220(%r1) # save R30 | |
123 | stw %r31, 224(%r1) # save R31 | |
124 | stw %r3, 228(%r1) # save hidden | |
125 | ||
126 | # save CR | |
127 | mfcr %r0 | |
128 | stw %r0, 232(%r1) | |
129 | # save LR | |
130 | mflr %r0 | |
131 | stw %r0, 236(%r1) | |
132 | # save LR as PC | |
133 | stw %r0, 240(%r1) | |
134 | ||
135 | # store RSP (pointing to context-data) in R6 | |
136 | mr %r6, %r1 | |
137 | ||
138 | # restore RSP (pointing to context-data) from R4 | |
139 | mr %r1, %r4 | |
140 | ||
141 | lfd %f14, 0(%r1) # restore F14 | |
142 | lfd %f15, 8(%r1) # restore F15 | |
143 | lfd %f16, 16(%r1) # restore F16 | |
144 | lfd %f17, 24(%r1) # restore F17 | |
145 | lfd %f18, 32(%r1) # restore F18 | |
146 | lfd %f19, 40(%r1) # restore F19 | |
147 | lfd %f20, 48(%r1) # restore F20 | |
148 | lfd %f21, 56(%r1) # restore F21 | |
149 | lfd %f22, 64(%r1) # restore F22 | |
150 | lfd %f23, 72(%r1) # restore F23 | |
151 | lfd %f24, 80(%r1) # restore F24 | |
152 | lfd %f25, 88(%r1) # restore F25 | |
153 | lfd %f26, 96(%r1) # restore F26 | |
154 | lfd %f27, 104(%r1) # restore F27 | |
155 | lfd %f28, 112(%r1) # restore F28 | |
156 | lfd %f29, 120(%r1) # restore F29 | |
157 | lfd %f30, 128(%r1) # restore F30 | |
158 | lfd %f31, 136(%r1) # restore F31 | |
159 | lfd %f0, 144(%r1) # load FPSCR | |
160 | mtfsf 0xff, %f0 # restore FPSCR | |
161 | ||
162 | lwz %r13, 152(%r1) # restore R13 | |
163 | lwz %r14, 156(%r1) # restore R14 | |
164 | lwz %r15, 160(%r1) # restore R15 | |
165 | lwz %r16, 164(%r1) # restore R16 | |
166 | lwz %r17, 168(%r1) # restore R17 | |
167 | lwz %r18, 172(%r1) # restore R18 | |
168 | lwz %r19, 176(%r1) # restore R19 | |
169 | lwz %r20, 180(%r1) # restore R20 | |
170 | lwz %r21, 184(%r1) # restore R21 | |
171 | lwz %r22, 188(%r1) # restore R22 | |
172 | lwz %r23, 192(%r1) # restore R23 | |
173 | lwz %r24, 196(%r1) # restore R24 | |
174 | lwz %r25, 200(%r1) # restore R25 | |
175 | lwz %r26, 204(%r1) # restore R26 | |
176 | lwz %r27, 208(%r1) # restore R27 | |
177 | lwz %r28, 212(%r1) # restore R28 | |
178 | lwz %r29, 216(%r1) # restore R29 | |
179 | lwz %r30, 220(%r1) # restore R30 | |
180 | lwz %r31, 224(%r1) # restore R31 | |
181 | lwz %r3, 228(%r1) # restore hidden | |
182 | ||
183 | # restore CR | |
184 | lwz %r0, 232(%r1) | |
185 | mtcr %r0 | |
186 | # restore LR | |
187 | lwz %r0, 236(%r1) | |
188 | mtlr %r0 | |
189 | # load PC | |
190 | lwz %r0, 240(%r1) | |
191 | # restore CTR | |
192 | mtctr %r0 | |
193 | ||
194 | # adjust stack | |
195 | addi %r1, %r1, 244 | |
196 | ||
197 | # return transfer_t | |
198 | stw %r6, 0(%r3) | |
199 | stw %r5, 4(%r3) | |
200 | ||
201 | # jump to context | |
202 | bctr | |
203 | .size jump_fcontext, .-jump_fcontext | |
204 | ||
205 | /* Mark that we don't need executable stack. */ | |
206 | .section .note.GNU-stack,"",%progbits |