Loaded programs must be under the ELF64 format, other formats may be supported in the future. Loaded programs can be static or relocatable.
When loading a static executable, no sections of the executable will be loaded below 2M in memory. This is done as to ensure NULL remains unmapped.
ld.so, or any other linker program detailed on the interpreter segment
of the ELF executable will be a special case, it is assumed to be relocatable.