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InfluxDB
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extension [1]. It's a bit finicky to get it right (toolchains assume that object files are valid and don't have much in the way of diagnostics), but these are fairly simple under the hood. Section bytes, symbols and relocations, with some headers and metadata to wrap these up...
It's a bit of a shame that object files aren't more of a lingua franca of toolchains in practice. Embedding binary blobs inside a program in a portable way is still a mess today.
[1] https://github.com/boricj/ghidra-delinker-extension/tree/mas...
Low-level programming is one of my favourite subjects. I've written a simple ELF parser in Nim (with the help of an amazing binary parsing library) among other things: https://github.com/khaledh/elfdump
Always quality content in that blog. We used MaskRay's article[1] on stack unwinding to improve our debuginfo (DWARF) support[2] in the past. If someone wants to have a more hands-on approach to executable file formats, e.g., XCOFF or GOFF, they can check Rizin's ideas for new formats[3] to support.
[1] https://maskray.me/blog/2020-11-08-stack-unwinding
[2] https://rizin.re/posts/gsoc-2023-dwarf/
[3] https://github.com/rizinorg/ideas/issues?q=is%3Aissue+is%3Ao...