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67 lines
1.8 KiB
ArmAsm
67 lines
1.8 KiB
ArmAsm
.text
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.set linkageArea,24
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.set params,4
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.set alignment,4
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.set spaceToSave,linkageArea+params+alignment
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.set spaceToSave8,spaceToSave+8
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; Mark from machine registers that are saved by C compiler
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.globl _GC_push_regs
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_GC_push_regs:
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; PROLOG
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mflr r0 ; get return address
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stw r0,8(r1) ; save return address
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stwu r1,-spaceToSave(r1) ; skip over caller save area
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;
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mr r3,r2 ; mark from r2. Well I'm not really sure
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; that this is necessary or even the right
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; thing to do - at least it doesn't harm...
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; According to Apple's docs it points to
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; the direct data area, whatever that is...
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bl _GC_push_one
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mr r3,r13 ; mark from r13-r31
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bl _GC_push_one
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mr r3,r14
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bl _GC_push_one
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mr r3,r15
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bl _GC_push_one
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mr r3,r16
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bl _GC_push_one
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mr r3,r17
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bl _GC_push_one
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mr r3,r18
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bl _GC_push_one
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mr r3,r19
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bl _GC_push_one
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mr r3,r20
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bl _GC_push_one
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mr r3,r21
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bl _GC_push_one
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mr r3,r22
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bl _GC_push_one
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mr r3,r23
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bl _GC_push_one
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mr r3,r24
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bl _GC_push_one
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mr r3,r25
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bl _GC_push_one
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mr r3,r26
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bl _GC_push_one
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mr r3,r27
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bl _GC_push_one
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mr r3,r28
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bl _GC_push_one
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mr r3,r29
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bl _GC_push_one
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mr r3,r30
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bl _GC_push_one
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mr r3,r31
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bl _GC_push_one
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; EPILOG
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lwz r0,spaceToSave8(r1) ; get return address back
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mtlr r0 ; reset link register
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addic r1,r1,spaceToSave ; restore stack pointer
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blr
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