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Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | /******************************************************* |
2 | * * | |
3 | * ------------------------------------------------- * | |
4 | * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | * | |
5 | * ------------------------------------------------- * | |
6 | * | 0x0 | 0x4 | 0x8 | 0xc | 0x10| 0x14| 0x18| 0x1c| * | |
7 | * ------------------------------------------------- * | |
8 | * | x19 | x20 | x21 | x22 | * | |
9 | * ------------------------------------------------- * | |
10 | * ------------------------------------------------- * | |
11 | * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * | |
12 | * ------------------------------------------------- * | |
13 | * | 0x20| 0x24| 0x28| 0x2c| 0x30| 0x34| 0x38| 0x3c| * | |
14 | * ------------------------------------------------- * | |
15 | * | x23 | x24 | x25 | x26 | * | |
16 | * ------------------------------------------------- * | |
17 | * ------------------------------------------------- * | |
18 | * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | * | |
19 | * ------------------------------------------------- * | |
20 | * | 0x40| 0x44| 0x48| 0x4c| 0x50| 0x54| 0x58| 0x5c| * | |
21 | * ------------------------------------------------- * | |
22 | * | x27 | x28 | FP | LR | * | |
23 | * ------------------------------------------------- * | |
24 | * ------------------------------------------------- * | |
25 | * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | * | |
26 | * ------------------------------------------------- * | |
27 | * | 0x60| 0x64| 0x68| 0x6c| 0x70| 0x74| 0x78| 0x7c| * | |
28 | * ------------------------------------------------- * | |
29 | * | PC | align | | | * | |
30 | * ------------------------------------------------- * | |
31 | * * | |
32 | *******************************************************/ | |
33 | ||
34 | .text | |
35 | .globl _jump_fcontext | |
36 | .balign 16 | |
37 | _jump_fcontext: | |
38 | ; prepare stack for GP + FPU | |
39 | sub sp, sp, #0x70 | |
40 | ||
41 | ; save x19-x30 | |
42 | stp x19, x20, [sp, #0x00] | |
43 | stp x21, x22, [sp, #0x10] | |
44 | stp x23, x24, [sp, #0x20] | |
45 | stp x25, x26, [sp, #0x30] | |
46 | stp x27, x28, [sp, #0x40] | |
47 | stp fp, lr, [sp, #0x50] | |
48 | ||
49 | ; save LR as PC | |
50 | str lr, [sp, #0x60] | |
51 | ||
52 | ; store RSP (pointing to context-data) in X0 | |
53 | mov x4, sp | |
54 | ||
55 | ; restore RSP (pointing to context-data) from X1 | |
56 | mov sp, x0 | |
57 | ||
58 | ; load x19-x30 | |
59 | ldp x19, x20, [sp, #0x00] | |
60 | ldp x21, x22, [sp, #0x10] | |
61 | ldp x23, x24, [sp, #0x20] | |
62 | ldp x25, x26, [sp, #0x30] | |
63 | ldp x27, x28, [sp, #0x40] | |
64 | ldp fp, lr, [sp, #0x50] | |
65 | ||
66 | ; return transfer_t from jump | |
67 | ; pass transfer_t as first arg in context function | |
68 | ; X0 == FCTX, X1 == DATA | |
69 | mov x0, x4 | |
70 | ||
71 | ; load pc | |
72 | ldr x4, [sp, #0x60] | |
73 | ||
74 | ; restore stack from GP + FPU | |
75 | add sp, sp, #0x70 | |
76 | ||
77 | ret x4 |