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 | * ------------------------------------------------- * | |
| 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 | * ------------------------------------------------- * | |
| 36 | * | DATA| | | | | * | |
| 37 | * ------------------------------------------------- * | |
| 38 | * * | |
| 39 | *******************************************************/ | |
| 40 | ||
| 41 | .text | |
| 42 | .globl ontop_fcontext | |
| 43 | .align 2 | |
| 44 | .type ontop_fcontext,@function | |
| 45 | ontop_fcontext: | |
| 46 | # reserve space on stack | |
| 47 | subi %r1, %r1, 92 | |
| 48 | ||
| 49 | stw %r13, 0(%r1) # save R13 | |
| 50 | stw %r14, 4(%r1) # save R14 | |
| 51 | stw %r15, 8(%r1) # save R15 | |
| 52 | stw %r16, 12(%r1) # save R16 | |
| 53 | stw %r17, 16(%r1) # save R17 | |
| 54 | stw %r18, 20(%r1) # save R18 | |
| 55 | stw %r19, 24(%r1) # save R19 | |
| 56 | stw %r20, 28(%r1) # save R20 | |
| 57 | stw %r21, 32(%r1) # save R21 | |
| 58 | stw %r22, 36(%r1) # save R22 | |
| 59 | stw %r23, 40(%r1) # save R23 | |
| 60 | stw %r24, 44(%r1) # save R24 | |
| 61 | stw %r25, 48(%r1) # save R25 | |
| 62 | stw %r26, 52(%r1) # save R26 | |
| 63 | stw %r27, 56(%r1) # save R27 | |
| 64 | stw %r28, 60(%r1) # save R28 | |
| 65 | stw %r29, 64(%r1) # save R29 | |
| 66 | stw %r30, 68(%r1) # save R30 | |
| 67 | stw %r31, 72(%r1) # save R31 | |
| 68 | stw %r3, 76(%r1) # save hidden | |
| 69 | ||
| 70 | # save CR | |
| 71 | mfcr %r0 | |
| 72 | stw %r0, 80(%r1) | |
| 73 | # save LR | |
| 74 | mflr %r0 | |
| 75 | stw %r0, 84(%r1) | |
| 76 | # save LR as PC | |
| 77 | stw %r0, 88(%r1) | |
| 78 | ||
| 79 | # store RSP (pointing to context-data) in R7 | |
| 80 | mr %r7, %r1 | |
| 81 | ||
| 82 | # restore RSP (pointing to context-data) from R4 | |
| 83 | mr %r1, %r4 | |
| 84 | ||
| 85 | lwz %r13, 0(%r1) # restore R13 | |
| 86 | lwz %r14, 4(%r1) # restore R14 | |
| 87 | lwz %r15, 8(%r1) # restore R15 | |
| 88 | lwz %r16, 12(%r1) # restore R16 | |
| 89 | lwz %r17, 16(%r1) # restore R17 | |
| 90 | lwz %r18, 20(%r1) # restore R18 | |
| 91 | lwz %r19, 24(%r1) # restore R19 | |
| 92 | lwz %r20, 28(%r1) # restore R20 | |
| 93 | lwz %r21, 32(%r1) # restore R21 | |
| 94 | lwz %r22, 36(%r1) # restore R22 | |
| 95 | lwz %r23, 40(%r1) # restore R23 | |
| 96 | lwz %r24, 44(%r1) # restore R24 | |
| 97 | lwz %r25, 48(%r1) # restore R25 | |
| 98 | lwz %r26, 52(%r1) # restore R26 | |
| 99 | lwz %r27, 56(%r1) # restore R27 | |
| 100 | lwz %r28, 60(%r1) # restore R28 | |
| 101 | lwz %r29, 64(%r1) # restore R29 | |
| 102 | lwz %r30, 68(%r1) # restore R30 | |
| 103 | lwz %r31, 72(%r1) # restore R31 | |
| 104 | lwz %r4, 76(%r1) # restore hidden | |
| 105 | ||
| 106 | # restore CR | |
| 107 | lwz %r0, 80(%r1) | |
| 108 | mtcr %r0 | |
| 109 | # restore LR | |
| 110 | lwz %r0, 84(%r1) | |
| 111 | mtlr %r0 | |
| 112 | # ignore PC | |
| 113 | ||
| 114 | # adjust stack | |
| 115 | addi %r1, %r1, 92 | |
| 116 | ||
| 117 | # return transfer_t | |
| 118 | stw %r7, 0(%r4) | |
| 119 | stw %r5, 4(%r4) | |
| 120 | ||
| 121 | # restore CTR | |
| 122 | mtctr %r6 | |
| 123 | ||
| 124 | # jump to ontop-function | |
| 125 | bctr | |
| 126 | .size ontop_fcontext, .-ontop_fcontext | |
| 127 | ||
| 128 | /* Mark that we don't need executable stack. */ | |
| 129 | .section .note.GNU-stack,"",%progbits |