Here is the sample of MAP file from my test project...
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0001:001EFC14 00000020 C=CODE S=.text G=(none) M=Vcl.CategoryButtons A
The format is:
SegmentId:StartAddress Length C=SegmentClass S=SegmentName G=SegmentGroup M=ModuleName
The ACBP has something to do with alignment but I can't tell you what the hex numbers mean.
C=CODE: Code-Segment
C=ICODE: Initialization Code-Segment
C=DATA: (initialized) Data-Segment
C=BSS: (uninitialized) Data-Segment
C=TLS: Thread Local Storage
G=(none): No Segment-Group