The boundaries aren't important during delinking, as long as you do not cut across a variable or function. To the linker, sections are just arrays of bytes. It

The boundaries aren't important during delinking, as long as you do not cut across a variable or function. To the linker, sections are just arrays of bytes. It doesn't care what's inside those, all it has to do is lay them out in memory and apply relocations. How you decide to slice up the original program is up to you. It doesn't have to follow the boundaries from the original object files.