projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
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 | * ------------------------------------------------- * | |
| b32b8144 | 15 | * | F20 | F22 | F24 | F26 | * |
| 7c673cae FG |
16 | * ------------------------------------------------- * |
| 17 | * ------------------------------------------------- * | |
| 18 | * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | * | |
| 19 | * ------------------------------------------------- * | |
| 20 | * | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | * | |
| 21 | * ------------------------------------------------- * | |
| b32b8144 FG |
22 | * | F28 | F30 | S0 | S1 | S2 | S3 | * |
| 23 | * ------------------------------------------------- * | |
| 24 | * ------------------------------------------------- * | |
| 25 | * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | * | |
| 26 | * ------------------------------------------------- * | |
| 27 | * | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | * | |
| 28 | * ------------------------------------------------- * | |
| 29 | * | S4 | S5 | S6 | S7 | FP |hiddn| RA | PC | * | |
| 30 | * ------------------------------------------------- * | |
| 31 | * ------------------------------------------------- * | |
| 32 | * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | * | |
| 33 | * ------------------------------------------------- * | |
| 34 | * | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | * | |
| 35 | * ------------------------------------------------- * | |
| 36 | * | GP | FCTX| DATA| | | | | | * | |
| 7c673cae FG |
37 | * ------------------------------------------------- * |
| 38 | * * | |
| 39 | * *****************************************************/ | |
| 40 | ||
| 41 | .text | |
| 42 | .globl ontop_fcontext | |
| 43 | .align 2 | |
| 44 | .type ontop_fcontext,@function | |
| 45 | .ent ontop_fcontext | |
| 46 | ontop_fcontext: | |
| 47 | # reserve space on stack | |
| b32b8144 | 48 | addiu $sp, $sp, -96 |
| 7c673cae | 49 | |
| b32b8144 FG |
50 | sw $s0, 48($sp) # save S0 |
| 51 | sw $s1, 52($sp) # save S1 | |
| 52 | sw $s2, 56($sp) # save S2 | |
| 53 | sw $s3, 60($sp) # save S3 | |
| 54 | sw $s4, 64($sp) # save S4 | |
| 55 | sw $s5, 68($sp) # save S5 | |
| 56 | sw $s6, 72($sp) # save S6 | |
| 57 | sw $s7, 76($sp) # save S7 | |
| 58 | sw $fp, 80($sp) # save FP | |
| 59 | sw $a0, 84($sp) # save hidden, address of returned transfer_t | |
| 60 | sw $ra, 88($sp) # save RA | |
| 61 | sw $ra, 92($sp) # save RA as PC | |
| 62 | ||
| 63 | #if defined(__mips_hard_float) | |
| 64 | s.d $f20, ($sp) # save F20 | |
| 65 | s.d $f22, 8($sp) # save F22 | |
| 66 | s.d $f24, 16($sp) # save F24 | |
| 67 | s.d $f26, 24($sp) # save F26 | |
| 68 | s.d $f28, 32($sp) # save F28 | |
| 69 | s.d $f30, 40($sp) # save F30 | |
| 70 | #endif | |
| 7c673cae FG |
71 | |
| 72 | # store SP (pointing to context-data) in A0 | |
| 73 | move $a0, $sp | |
| 74 | ||
| 75 | # restore SP (pointing to context-data) from A1 | |
| 76 | move $sp, $a1 | |
| 77 | ||
| b32b8144 FG |
78 | #if defined(__mips_hard_float) |
| 79 | l.d $f20, ($sp) # restore F20 | |
| 80 | l.d $f22, 8($sp) # restore F22 | |
| 81 | l.d $f24, 16($sp) # restore F24 | |
| 82 | l.d $f26, 24($sp) # restore F26 | |
| 83 | l.d $f28, 32($sp) # restore F28 | |
| 84 | l.d $f30, 40($sp) # restore F30 | |
| 85 | #endif | |
| 86 | ||
| 87 | lw $s0, 48($sp) # restore S0 | |
| 88 | lw $s1, 52($sp) # restore S1 | |
| 89 | lw $s2, 56($sp) # restore S2 | |
| 90 | lw $s3, 60($sp) # restore S3 | |
| 91 | lw $s4, 64($sp) # restore S4 | |
| 92 | lw $s5, 68($sp) # restore S5 | |
| 93 | lw $s6, 72($sp) # restore S6 | |
| 94 | lw $s7, 76($sp) # restore S7 | |
| 95 | lw $fp, 80($sp) # restore FP | |
| 96 | lw $t0, 84($sp) # restore hidden, address of returned transfer_t | |
| 97 | lw $ra, 88($sp) # restore RA | |
| 7c673cae FG |
98 | |
| 99 | # load PC | |
| 100 | lw $t9, 44($sp) | |
| 101 | ||
| 102 | # adjust stack | |
| b32b8144 | 103 | addiu $sp, $sp, 96 |
| 7c673cae FG |
104 | |
| 105 | # return transfer_t from jump | |
| 106 | sw $a0, ($t0) # fctx of transfer_t | |
| 107 | sw $a2, 4($t0) # data of transfer_t | |
| 108 | # pass transfer_t as first arg in context function | |
| 109 | # A0 == hidden, A1 == fctx, A2 == data | |
| 110 | move $a1, $a0 | |
| 111 | move $a0, $t0 | |
| 112 | ||
| 113 | # jump to context | |
| 114 | jr $a3 | |
| 115 | .end ontop_fcontext | |
| 116 | .size ontop_fcontext, .-ontop_fcontext | |
| 117 | ||
| 118 | /* Mark that we don't need executable stack. */ | |
| 119 | .section .note.GNU-stack,"",%progbits |