2022-10-10 09:30:25 +00:00
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typedef struct PTMF {
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2022-10-10 09:34:20 +00:00
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long this_delta; // delta to this pointer
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long vtbl_offset; // offset in vtable (-1: not a virtual function)
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2022-10-10 09:30:25 +00:00
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union {
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2022-10-10 09:34:20 +00:00
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void* func_addr; //nonvirtual function address
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long ventry_offset; // of virtual function entry in vtable
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2022-10-10 09:30:25 +00:00
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} func_data;
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} PTMF;
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2022-10-10 09:34:20 +00:00
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const PTMF __ptmf_null = {0, 0, 0};
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2022-10-10 09:30:25 +00:00
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2022-10-10 09:34:20 +00:00
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/* clang-format off */
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2022-10-10 09:30:25 +00:00
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asm void __ptmf_test(register PTMF* ptmf) {
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nofralloc
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lwz r5, PTMF.this_delta(ptmf)
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lwz r6, PTMF.vtbl_offset(ptmf)
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lwz r7, PTMF.func_data(ptmf)
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li r3, 1
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cmpwi cr0, r5, 0
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cmpwi cr6, r6, 0
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cmpwi cr7, r7, 0
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bnelr cr0
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bnelr cr6
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bnelr cr7
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li r3, 0
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blr
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}
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asm void __ptmf_scall(...) {
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nofralloc
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lwz r0, PTMF.this_delta(r12)
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lwz r11, PTMF.vtbl_offset(r12)
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lwz r12, PTMF.func_data(r12)
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add r3, r3, r0
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cmpwi r11, 0
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blt @1
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lwzx r12, r3, r12
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lwzx r12, r12, r11
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@1
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mtctr r12
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bctr
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}
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/* clang-format - on*/
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