30 lines
645 B
ArmAsm
30 lines
645 B
ArmAsm
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.set gpApplication, 0x803e6000 # TODO version
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.set dst, 0x817fb000
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## TODO prevent softlock: check app state >= 4
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lis r5, gpApplication+8@ha
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lbz r5, gpApplication+8@l(r5)
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cmplwi r5, 4
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bltlr
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## r5 = 00D0C0DE
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lis r5, 0x00D0
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ori r5, r5, 0xC0DE
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## check if code is loaded (check header)
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lis r3, dst@ha
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### first 00D0C0DE
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### r3 = &dst
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lwzu r0, dst@l(r3)
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cmplw r0, r5
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bnelr
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### second 00D0C0DE
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lwz r0, 4(r3)
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cmplw r0, r5
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bnelr
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## backup r15 (pointer to current gecko instruction) at dst-4
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add r0, r15, r4
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stw r0, -4(r3)
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## update r15 = dst + 8(header) - r4(this C0 code size)
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addi r15, r3, 8
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sub r15, r15, r4
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blr
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