ref: b7bebb290854fb4aeff7f7112fda09d04818534f
dir: /src/libcrt/crt-amd64-darwin.s/
.bss .globl __environ __environ: .quad 0 .text .global start start: movq %rsp,%rbp /* load argc, argv, envp from stack */ movq (%rbp),%rdi /* argc */ leaq 8(%rbp),%rsi /* argv */ leaq 16(%rbp,%rdi,8),%rdx /* envp = argv + 8*argc + 8 */ movq %rdx,__environ(%rip) call _main movl %eax,%edi jmp _exit