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