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Using the nm command in Linux to see the symbols in my program, I see a symbol by the name _GLOBAL_OFFSET_TABLE_ as shown below. Can somebody elaborate what is _GLOBAL_OFFSET_TABLE_ used for?
0000000000614018 d _GLOBAL_OFFSET_TABLE_
704
_GLOBAL_OFFSET_TABLE_ is used to locate the real addresses of globals (functions, variables etc) for PIC (Position-Independent Code), its commonly referred to as the GOT, you can read up on it here and a more in-depth one here.
The Global Offset Table (or GOT) is a section inside of programs that holds addresses of functions that are dynamically linked. As mentioned in the page on calling conventions, most programs don't include every function they use to reduce binary size.
_GLOBAL_OFFSET_TABLE_ is used to locate the real addresses of globals (functions, variables etc) for PIC (Position-Independent Code), its commonly referred to as the GOT, you can read up on it here and a more indepth one here.
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