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31 lines
650 B
ArmAsm
31 lines
650 B
ArmAsm
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# The actual start address of the code-binary loaded by the initial ROP isn't always at a fixed address / codegen+0. Load the binary from the end of this loader to codegen+0.
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bl l0
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l0:
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mflr 3
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li 4, (_end - l0)
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add 4, 4, 3 # r4 = addr of _end.
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lwz 5, 0(4)
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addi 4,4,4 # r5 = u32 value at _end, then increase r4 by 0x4.
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mr 3, 29
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li 6, 2
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srw 5, 5, 6
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mtctr 5 # ctr reg = above u32 value >> 2.
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copylp: # Copy the data from _end+4 with size *_end, to the address from r29.
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lwz 5, 0(4)
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stw 5, 0(3)
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addi 4,4,4
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addi 3,3,4
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bdnz copylp
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add 1, 1, 30 # Jump to the code-loading ROP to load the codebin which was copied above.
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lwz 3, 4(1)
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mtctr 3
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bctr
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_end:
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