https://github.com/akkartik/mu/blob/master/apps/ex2.subx
 1 # Add 1 and 1, and return the result in the exit code.
 2 #
 3 # To run:
 4 #   $ ./subx translate init.linux examples/ex2.subx -o examples/ex2
 5 #   $ ./subx run examples/ex2
 6 # Expected result:
 7 #   $ echo $?
 8 #   2
 9 
10 == code
11 
12 Entry:
13 # ebx = 1
14 bb/copy-to-ebx  1/imm32
15 # increment ebx
16 43/increment-ebx
17 # exit(ebx)
18 e8/call  syscall_exit/disp32
19 
20 # . . vim:nowrap:textwidth=0