It's just not that complex as object files go, and the headers are relatively simple from a loader's perspective, you don't have to pull and process the symbols, unless you want too, and no fixup/relocation are involved in these static ARM variants.
Sometimes it helps to have a basic understanding of data representations and objects, but then I grew up with a better foundation in micro-controllers, because that's what the micro-processors of the day were.
FROMELF (KEIL / MDK / REALVIEW) can decompose multiple .BIN into a directory, so you don't need to get 2-4GB binaries..
