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)
8 /*******************************************************
10 * ------------------------------------------------- *
11 * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
12 * ------------------------------------------------- *
13 * | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | *
14 * ------------------------------------------------- *
15 * | R13 | R14 | R15 | R16 | R17 | R18 | R19 | R20 | *
16 * ------------------------------------------------- *
17 * ------------------------------------------------- *
18 * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
19 * ------------------------------------------------- *
20 * | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | *
21 * ------------------------------------------------- *
22 * | R21 | R22 | R23 | R24 | R25 | R26 | R27 | R28 | *
23 * ------------------------------------------------- *
24 * ------------------------------------------------- *
25 * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
26 * ------------------------------------------------- *
27 * | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | *
28 * ------------------------------------------------- *
29 * | R29 | R30 | R31 |hiddn| CR | LR | PC | FCTX| *
30 * ------------------------------------------------- *
31 * ------------------------------------------------- *
32 * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
33 * ------------------------------------------------- *
34 * | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | *
35 * ------------------------------------------------- *
37 * ------------------------------------------------- *
39 *******************************************************/
42 .globl _ontop_fcontext
45 # reserve space on stack
48 stw r13, 0(r1) # save R13
49 stw r14, 4(r1) # save R14
50 stw r15, 8(r1) # save R15
51 stw r16, 12(r1) # save R16
52 stw r17, 16(r1) # save R17
53 stw r18, 20(r1) # save R18
54 stw r19, 24(r1) # save R19
55 stw r20, 28(r1) # save R20
56 stw r21, 32(r1) # save R21
57 stw r22, 36(r1) # save R22
58 stw r23, 40(r1) # save R23
59 stw r24, 44(r1) # save R24
60 stw r25, 48(r1) # save R25
61 stw r26, 52(r1) # save R26
62 stw r27, 56(r1) # save R27
63 stw r28, 60(r1) # save R28
64 stw r29, 64(r1) # save R29
65 stw r30, 68(r1) # save R30
66 stw r31, 72(r1) # save R31
67 stw r3, 76(r1) # save hidden
78 # store RSP (pointing to context-data) in R7
81 # restore RSP (pointing to context-data) from R4
84 lwz r13, 0(r1) # restore R13
85 lwz r14, 4(r1) # restore R14
86 lwz r15, 8(r1) # restore R15
87 lwz r16, 12(r1) # restore R16
88 lwz r17, 16(r1) # restore R17
89 lwz r18, 20(r1) # restore R18
90 lwz r19, 24(r1) # restore R19
91 lwz r20, 28(r1) # restore R20
92 lwz r21, 32(r1) # restore R21
93 lwz r22, 36(r1) # restore R22
94 lwz r23, 40(r1) # restore R23
95 lwz r24, 44(r1) # restore R24
96 lwz r25, 48(r1) # restore R25
97 lwz r26, 52(r1) # restore R26
98 lwz r27, 56(r1) # restore R27
99 lwz r28, 60(r1) # restore R28
100 lwz r29, 64(r1) # restore R29
101 lwz r30, 68(r1) # restore R30
102 lwz r31, 72(r1) # restore R31
103 lwz r4, 76(r1) # restore hidden
123 # jump to ontop-function