ref: c4cdbc4d2d64242bc19f8b666783ed32d13b6792
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