Currently we're relying on the order of unknown output section to frame certain sections (minfo, deh) with runtime accessibly brackets. A cleaner solution would be to use PROVIDE_HIDDEN(_mingo_beg) in a linker script.
It's possible to extend the default linker scripts using -T and the INSERT command, see http://sourceware.org/binutils/docs/ld/Miscellaneous-Commands.html#Miscellaneous-Commands