152 lines
5.5 KiB
ArmAsm
152 lines
5.5 KiB
ArmAsm
/*
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Copyright Oliver Kowalke 2009.
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*******************************************************
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* *
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* ------------------------------------------------- *
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* | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | *
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* ------------------------------------------------- *
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* | 0 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | *
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* ------------------------------------------------- *
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* | TOC | R14 | R15 | R16 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
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* ------------------------------------------------- *
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* | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | *
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* ------------------------------------------------- *
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* | R17 | R18 | R19 | R20 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
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* ------------------------------------------------- *
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* | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | *
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* ------------------------------------------------- *
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* | R21 | R22 | R23 | R24 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
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* ------------------------------------------------- *
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* | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | *
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* ------------------------------------------------- *
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* | R25 | R26 | R27 | R28 | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
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* ------------------------------------------------- *
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* | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | *
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* ------------------------------------------------- *
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* | R29 | R30 | R31 | hidden | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | *
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* ------------------------------------------------- *
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* | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 | *
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* ------------------------------------------------- *
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* | CR | LR | PC | back-chain| *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | *
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* ------------------------------------------------- *
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* | 192 | 196 | 200 | 204 | 208 | 212 | 216 | 220 | *
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* ------------------------------------------------- *
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* | cr saved | lr saved | compiler | linker | *
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* ------------------------------------------------- *
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* ------------------------------------------------- *
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* | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | *
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* ------------------------------------------------- *
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* | 224 | 228 | 232 | 236 | 240 | 244 | 248 | 252 | *
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* ------------------------------------------------- *
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* | TOC saved | FCTX | DATA | | *
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* ------------------------------------------------- *
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* *
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*******************************************************/
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.text
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.align 2
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.globl _ostd_ontop_fcontext
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_ostd_ontop_fcontext:
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; reserve space on stack
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subi r1, r1, 184
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std r14, 8(r1) ; save R14
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std r15, 16(r1) ; save R15
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std r16, 24(r1) ; save R16
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std r17, 32(r1) ; save R17
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std r18, 40(r1) ; save R18
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std r19, 48(r1) ; save R19
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std r20, 56(r1) ; save R20
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std r21, 64(r1) ; save R21
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std r22, 72(r1) ; save R22
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std r23, 80(r1) ; save R23
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std r24, 88(r1) ; save R24
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std r25, 96(r1) ; save R25
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std r26, 104(r1) ; save R26
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std r27, 112(r1) ; save R27
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std r28, 120(r1) ; save R28
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std r29, 128(r1) ; save R29
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std r30, 136(r1) ; save R30
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std r31, 144(r1) ; save R31
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std r3, 152(r1) ; save hidden
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; save CR
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mfcr r0
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std r0, 160(r1)
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; save LR
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mflr r0
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std r0, 168(r1)
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; save LR as PC
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std r0, 176(r1)
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; store RSP (pointing to context-data) in R7
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mr r7, r1
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; restore RSP (pointing to context-data) from R4
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mr r1, r4
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ld r14, 8(r1) ; restore R14
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ld r15, 16(r1) ; restore R15
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ld r16, 24(r1) ; restore R16
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ld r17, 32(r1) ; restore R17
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ld r18, 40(r1) ; restore R18
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ld r19, 48(r1) ; restore R19
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ld r20, 56(r1) ; restore R20
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ld r21, 64(r1) ; restore R21
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ld r22, 72(r1) ; restore R22
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ld r23, 80(r1) ; restore R23
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ld r24, 88(r1) ; restore R24
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ld r25, 96(r1) ; restore R25
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ld r26, 104(r1) ; restore R26
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ld r27, 112(r1) ; restore R27
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ld r28, 120(r1) ; restore R28
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ld r29, 128(r1) ; restore R29
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ld r30, 136(r1) ; restore R30
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ld r31, 144(r1) ; restore R31
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ld r4, 152(r1) ; restore hidden
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; restore CR
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ld r0, 160(r1)
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mtcr r0
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; restore LR
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ld r0, 168(r1)
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mtlr r0
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; ignore PC
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; adjust stack
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addi r1, r1, 184
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; return transfer_t
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std r7, 0(r4)
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std r5, 8(r4)
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; restore CTR
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mtctr r6
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; jump to context
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bctr
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