extracting shellcode from a execve binary.

[KF <dotslash () snosoft com>]

Attached is the asm code for execve of /bin/sh in PowerPC linux
The code compiles and executes fine, however I am having trouble
extracting the shellcode from the binary... does anyone have any tips
for getting the shellcode in \x41\x41\x41\x41 format. 

I have tried doing x/bx main however I don't really know where to begin,
I have seen people start at x/bx main+4 and I have seen people 
start at just x/bx main...which is correct? The next question is where
to stop? 
-KF

Attachment: execve.s
Description: