ref: 294f81566ec7b4d9c4b544b27f2446573be4c7eb
dir: /libstd/start-osx.s/
.globl start
start:
/* turn args into a slice */
/* TODO */
/* enter the main program */
call _main
/* exit */
movq %rax,%rdi
movq $0x2000001,%rax
syscall