Breakdown of ESIL

What A, R, W, N means

A denotes all registers
R denotes registers being read
W denotes registers being written to
N denotes registers not being used
Example:

[0x08048460]> aea A: esp eip edx # all registers being used R: esp eip edx # registers being read W: esp eip # registers being written to N: edx # registers not being used L0: 0xfffffffc