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nmichaels.org

I write embedded software for a living. Nothing on this site represents the views or opinions of anyone but me. My interests are in geekiness, sailing, cycling, and music. If there's something for you to like here, it's almost certainly on the scripts page.

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D4D4

A co-worker of mine (the incomparable Yohei Manabe) was looking at some disassembled ARM code the other day, and discovered something weird. Lots of d4d4 instructions, scattered about. LLVM’s objdump says this is a relative branch to -0x58 . The weird part is that they were always unreachable.