L251 map file symbol table

Above are found under the "SYMBOL TABLE OF MODULE" section of my generated map file. 

Question 1

From the L251 user guide it is said that "the first 32 bytes of DATA memory (0x00-0x1F) is grouped into 4 banks of 8 registers each"

Is it safe to assume then that REGSYM symbols above are in the DATA memory area?

If yes, then how come it isnt explicitly written in the mapfile
If no, should I consider it a "linker symbol" then?

Question 2
What are LINE symbols? why some of it are in the ECODE memory class, why some are not indicated in the mapfile?

Question 3
How about BLOCK and BLOCKEND symbol? Could you explain what are these symbols? 

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