Section names and contents in GCC output files

[Jurgis Armanavichius]

Hi,
 
I have very simple question: how are 
named all
sections (.text, .rodata etc) in GCC compiled 
file?
And what information is located in this sections?
(.text - program code, .bss - uninit data?, .rodata - 

constants?)
Where I can read about this?
Thank you.
 
Jurgis Armanavichius Firma MEDELKOM, http://www.medelkom.com