basics/libc/crt1.c

   1 extern void __wasm_call_ctors(void);
   2 extern int main(int, char *[]);
   3 extern void __prepare_for_exit(void);
   4 void _Exit(int) __attribute__((noreturn));
   5
   6 void _start(void) {
   7     /* The linker synthesizes this to call constructors. */
   8     __wasm_call_ctors();
   9
  10     /* Call main with no arguments. */
  11     int r = main(0, 0);
  12
  13     /* Call atexit functions, destructors, stdio cleanup, etc. */
  14     __prepare_for_exit();
  15
  16     /* If main exited successfully, just return, otherwise call _Exit. */
  17     if (r != 0) {
  18         _Exit(r);
  19     }
  20 }