Difference between /proc/ksyms and System.map

["Ahmed M" <ahmedh11@hotmail.com>]

Greetings,

Would appreciate it if anyone can shed some light on the differences between 
the following:

1) $ cat /proc/ksyms

2) $ /sbin/ksyms

3) $ cat /boot/System.map     // The map file for the running kernel

I am getting different output for all three.

Q1. I was expeting that 1 & 2 should be some, but were not?  Why?

Q2. I was expecting 3 to be different from  1&2 , because it does not 
contain moudule symbols.  Is that true assumption.

Q3. Is 1 or 2  a superset of the contents of System.map file?  If so, what 
else info does it contain?

Thanks in advance,
Ahmed.


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