Rough outline of commands used for gdb demo on mov.s:

> gcc -o mov mov.s
> gdb mov
> break main
> run
> stepi 3
> disas main
> print $rax
> print /x $rax
> print /x $eax
> print /x $al
> print /x $rbx
> print /x $rcx
> stepi
> print /x $rbx
> stepi
> print /x $rbx
> disas main
> stepi
> print /x $rax
> x $rax
> x /gx $rax
> x /bx $rax+4
> stepi
> print /x $rbx
> kill
> y
> quit