Why objdump can recognize the PE file

[mobile.parmenides]

Hi,

   Within cygwin, the binutil of objdump is able to recognize PE format
file.  But, objdump is ported from linux, why it can do like this?
Futhermore, does it mean that objdump can recognize any type of
executable file? just curiostioy.

 				
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mobile.parmenides
2008-12-27