7.3.2.4 Segment Listing
The class listing in the map file is followed by a listing of segments. Typically this section of the map file can be ignored by the user.
A segment is a conceptual grouping of contiguous psects in the same memory space, and is used by the linker as an aid in psect placement. There is no segment assembler directive and segments cannot be controlled in any way.
This section is heralded by the line that contains the headings:
SEGMENTS Name Load Length Top Selector Space Class
The name of a segment is derived from the psect in the contiguous group with the lowest link address. This can lead to confusion with the psect with the same name. Do not read psect information from this section of the map file.
Again, this section of the map file can be ignored.