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TODO.md

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TODO

General

  • Read elf object files (e.g. initialize.o).
  • Read archive files (e.g. libultra.a).
  • For the file, extract the opcode signature and precise signature
    • opcode signature is a list of top bytes & 0xFC, or more likely words & 0xFC000000
    • precise signature is a list of the entire instructions with relocations dummied out. (need to work out how to implement this, probably just store a bitmask with each one?)
  • Identify low-hanging fruit, viz. files where at least one of
    • no relocations occur
    • functions are handwritten (bcmp, bzero, bcopy, osInvalICache, etc.)
    • functions are extremely short (most of the handwritten Get and Set ones)
    • functions are very common.
  • Identify a reasonable call tree of libultra functions to make iterative search realistic. Hopefully some of this can be automated?

For N64

  • Parse entrypoint and header, obtain
    • entrypoint vram
    • boot segment size
    • bss size
  • Extract the bytes, probably to an array of some kind (should be fine, will be maximum size 1 MB).

For a general contiguous binary blob with known vram

  • Come up with a good way to carry out an iterative search to identify files

Problems/tricky files

  • parameters.o is 0x60 bytes of 0s
  • Some files are identical, and must be deduced from what other functions use them (should not be a problem here).
  • there will be more than one clique in general.