https://github.com/akkartik/mu/blob/main/linux/ex1.subx
 1 # First program: same as https://www.muppetlabs.com/~breadbox/software/tiny/teensy.html
 2 # Just return 42.
 3 #
 4 # To run:
 5 #   $ bootstrap/bootstrap translate ex1.subx -o ex1
 6 #   $ bootstrap/bootstrap run ex1
 7 # Expected result:
 8 #   $ echo $?
 9 #   42
10 
11 == code
12 
13 Entry:
14 # exit(42)
15 bb/copy-to-ebx  0x2a/imm32  # 42 in hex
16 e8/call  syscall_exit/disp32
17 
18 # . . vim:nowrap:textwidth=0