exit.c raw

   1  #include <stdlib.h>
   2  #include <stdint.h>
   3  #include "libc.h"
   4  
   5  static void dummy()
   6  {
   7  }
   8  
   9  /* atexit.c and __stdio_exit.c override these. the latter is linked
  10   * as a consequence of linking either __toread.c or __towrite.c. */
  11  weak_alias(dummy, __funcs_on_exit);
  12  weak_alias(dummy, __stdio_exit);
  13  weak_alias(dummy, _fini);
  14  
  15  extern weak hidden void (*const __fini_array_start)(void), (*const __fini_array_end)(void);
  16  
  17  static void libc_exit_fini(void)
  18  {
  19  	uintptr_t a = (uintptr_t)&__fini_array_end;
  20  	for (; a>(uintptr_t)&__fini_array_start; a-=sizeof(void(*)()))
  21  		(*(void (**)())(a-sizeof(void(*)())))();
  22  	_fini();
  23  }
  24  
  25  weak_alias(libc_exit_fini, __libc_exit_fini);
  26  
  27  _Noreturn void exit(int code)
  28  {
  29  	__funcs_on_exit();
  30  	__libc_exit_fini();
  31  	__stdio_exit();
  32  	_Exit(code);
  33  }
  34