How can read the assembly code of analogWrite() and PinMode()?

Excuse me for my ignorance... but i use the arduino Java gui + avr-gcc compiler on linux. My problem is that I don't know in which folder the code is compiled and builded. I don't know where i can find the avr-objdump too. Is an executable on my system? Is another GUI program?. EDIT.. ok I found the avr-objdump on konsole. bash exec.

On the other hand. In which part of the source code can I find that? Must I download the source code for linux for example, open the tarball and look over there?

greetings to both and thank you.