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@@ -1,194 +1,240 @@
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-/*
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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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- * ------------------------------------------------- *
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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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-
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-.globl ontop_fcontext
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-#if _CALL_ELF == 2
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- .text
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- .align 2
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-ontop_fcontext:
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- addis %r2, %r12, .TOC.-ontop_fcontext@ha
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- addi %r2, %r2, .TOC.-ontop_fcontext@l
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- .localentry ontop_fcontext, . - ontop_fcontext
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-#else
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- .section ".opd","aw"
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- .align 3
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-ontop_fcontext:
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-# ifdef _CALL_LINUX
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- .quad .L.ontop_fcontext,.TOC.@tocbase,0
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- .type ontop_fcontext,@function
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- .text
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- .align 2
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-.L.ontop_fcontext:
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-# else
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- .hidden .ontop_fcontext
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- .globl .ontop_fcontext
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- .quad .ontop_fcontext,.TOC.@tocbase,0
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- .size ontop_fcontext,24
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- .type .ontop_fcontext,@function
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- .text
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- .align 2
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-.ontop_fcontext:
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-# endif
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-#endif
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- # reserve space on stack
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- subi %r1, %r1, 184
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-
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-#if _CALL_ELF != 2
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- std %r2, 0(%r1) # save TOC
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-#endif
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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 %r29, 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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-
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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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-
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- # store RSP (pointing to context-data) in R7
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- mr %r7, %r1
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-
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- # restore RSP (pointing to context-data) from R4
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- mr %r1, %r4
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-
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-#if _CALL_ELF != 2
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- ld %r2, 0(%r1) # restore TOC
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-#endif
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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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-
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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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-
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- # adjust stack
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- addi %r1, %r1, 184
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-
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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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-
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- # restore CTR
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- mtctr %r6
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-
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- # jump to context
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- bctr
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-#if _CALL_ELF == 2
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- .size ontop_fcontext, .-ontop_fcontext
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-#else
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-# ifdef _CALL_LINUX
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- .size .ontop_fcontext, .-.L.ontop_fcontext
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-# else
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- .size .ontop_fcontext, .-.ontop_fcontext
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-# endif
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-#endif
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-
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-
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-/* Mark that we don't need executable stack. */
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-.section .note.GNU-stack,"",%progbits
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+/*
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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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+ * ------------------------------------------------- *
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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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+
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+.globl ontop_fcontext
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+#if _CALL_ELF == 2
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+ .text
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+ .align 2
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+ontop_fcontext:
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+ addis %r2, %r12, .TOC.-ontop_fcontext@ha
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+ addi %r2, %r2, .TOC.-ontop_fcontext@l
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+ .localentry ontop_fcontext, . - ontop_fcontext
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+#else
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+ .section ".opd","aw"
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+ .align 3
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+ontop_fcontext:
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+# ifdef _CALL_LINUX
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+ .quad .L.ontop_fcontext,.TOC.@tocbase,0
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+ .type ontop_fcontext,@function
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+ .text
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+ .align 2
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+.L.ontop_fcontext:
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+# else
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+ .hidden .ontop_fcontext
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+ .globl .ontop_fcontext
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+ .quad .ontop_fcontext,.TOC.@tocbase,0
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+ .size ontop_fcontext,24
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+ .type .ontop_fcontext,@function
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+ .text
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+ .align 2
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+.ontop_fcontext:
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+# endif
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+#endif
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+ # reserve space on stack
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|
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+ subi %r1, %r1, 184
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+
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+#if _CALL_ELF != 2
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+ std %r2, 0(%r1) # save TOC
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|
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+#endif
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|
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+ std %r14, 8(%r1) # save R14
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|
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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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+#if _CALL_ELF != 2
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+ std %r3, 152(%r1) # save hidden
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+#endif
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+
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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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|
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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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|
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+
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+ # store RSP (pointing to context-data) in R7
|
|
|
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+ mr %r7, %r1
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+
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+#if _CALL_ELF == 2
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+ # restore RSP (pointing to context-data) from R3
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+ mr %r1, %r3
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+#else
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+ # restore RSP (pointing to context-data) from R4
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+ mr %r1, %r4
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+#endif
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+
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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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|
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+#if _CALL_ELF != 2
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|
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+ ld %r3, 152(%r1) # restore hidden
|
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|
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+#endif
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|
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+
|
|
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+ # restore CR
|
|
|
|
+ ld %r0, 160(%r1)
|
|
|
|
+ mtcr %r0
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|
|
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+
|
|
|
|
+#if _CALL_ELF == 2
|
|
|
|
+ # restore CTR
|
|
|
|
+ mtctr %r5
|
|
|
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+
|
|
|
|
+ # copy transfer_t into ontop_fn arg registers
|
|
|
|
+ mr %r3, %r7
|
|
|
|
+ # arg pointer already in %r4
|
|
|
|
+#else
|
|
|
|
+ # copy transfer_t into ontop_fn arg registers
|
|
|
|
+ mr %r4, %r7
|
|
|
|
+ # arg pointer already in %r5
|
|
|
|
+ # hidden arg already in %r3
|
|
|
|
+
|
|
|
|
+ # restore CTR
|
|
|
|
+ ld %r7, 0(%r6)
|
|
|
|
+ mtctr %r7
|
|
|
|
+ # restore TOC
|
|
|
|
+ ld %r2, 8(%r6)
|
|
|
|
+
|
|
|
|
+ # zero in r3 indicates first jump to context-function
|
|
|
|
+ cmpdi %r3, 0
|
|
|
|
+ beq use_entry_arg
|
|
|
|
+#endif
|
|
|
|
+
|
|
|
|
+return_to_ctx:
|
|
|
|
+ # restore LR
|
|
|
|
+ ld %r0, 168(%r1)
|
|
|
|
+ mtlr %r0
|
|
|
|
+
|
|
|
|
+ # adjust stack
|
|
|
|
+ addi %r1, %r1, 184
|
|
|
|
+
|
|
|
|
+ # jump to context
|
|
|
|
+ bctr
|
|
|
|
+
|
|
|
|
+#if _CALL_ELF == 2
|
|
|
|
+ .size ontop_fcontext, .-ontop_fcontext
|
|
|
|
+#else
|
|
|
|
+use_entry_arg:
|
|
|
|
+ # compute return-value struct address
|
|
|
|
+ # (passed has hidden arg to ontop_fn)
|
|
|
|
+ addi %r3, %r1, 8
|
|
|
|
+
|
|
|
|
+ # jump to context and update LR
|
|
|
|
+ bctrl
|
|
|
|
+
|
|
|
|
+ # restore CTR
|
|
|
|
+ ld %r7, 176(%r1)
|
|
|
|
+ mtctr %r7
|
|
|
|
+#if _CALL_ELF != 2
|
|
|
|
+ # restore TOC
|
|
|
|
+ ld %r2, 0(%r1)
|
|
|
|
+#endif
|
|
|
|
+
|
|
|
|
+ # copy returned transfer_t into entry_fn arg registers
|
|
|
|
+ ld %r3, 8(%r1)
|
|
|
|
+ ld %r4, 16(%r1)
|
|
|
|
+
|
|
|
|
+ b return_to_ctx
|
|
|
|
+# ifdef _CALL_LINUX
|
|
|
|
+ .size .ontop_fcontext, .-.L.ontop_fcontext
|
|
|
|
+# else
|
|
|
|
+ .size .ontop_fcontext, .-.ontop_fcontext
|
|
|
|
+# endif
|
|
|
|
+#endif
|
|
|
|
+
|
|
|
|
+
|
|
|
|
+/* Mark that we don't need executable stack. */
|
|
|
|
+.section .note.GNU-stack,"",%progbits
|