x64/start.s

   1 format ELF64
   2
   3 extrn environ
   4
   5 extrn main
   6 extrn __neatlibc_exit
   7 public _start
   8 _start:
   9         xor     rbp, rbp
  10         pop     rdi                     ; argc
  11         mov     rsi, rsp                ; argv
  12         push    rdi
  13         lea     rdx, [rsi + rdi * 8 + 8]; envp
  14         mov     [environ], rdx
  15         and     rsp, -16                ; align rsp
  16
  17         call    main
  18         mov     rbx, rax
  19         call    __neatlibc_exit
  20         mov     rdi, rbx
  21         mov     rax, 60
  22         syscall