newlib/libc/misc/init.c

   1 /*
   2  * Copyright (C) 2004 CodeSourcery, LLC
   3  *
   4  * Permission to use, copy, modify, and distribute this file
   5  * for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice and this notice appears in all
   7  * copies.
   8  *
   9  * This file is distributed WITHOUT ANY WARRANTY; without even the implied
  10  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  */
  12
  13 /* Handle ELF .{pre_init,init,fini}_array sections.  */
  14 #include <sys/types.h>
  15
  16 #ifdef _HAVE_INITFINI_ARRAY
  17
  18 /* These magic symbols are provided by the linker.  */
  19 extern void (*__preinit_array_start []) (void) __attribute__((weak));
  20 extern void (*__preinit_array_end []) (void) __attribute__((weak));
  21 extern void (*__init_array_start []) (void) __attribute__((weak));
  22 extern void (*__init_array_end []) (void) __attribute__((weak));
  23
  24 #ifdef _HAVE_INIT_FINI
  25 extern void _init (void);
  26 #endif
  27
  28 /* Iterate over all the init routines.  */
  29 void
  30 __libc_init_array (void)
  31 {
  32   size_t count;
  33   size_t i;
  34
  35   count = __preinit_array_end - __preinit_array_start;
  36   for (i = 0; i < count; i++)
  37     __preinit_array_start[i] ();
  38
  39 #ifdef _HAVE_INIT_FINI
  40   _init ();
  41 #endif
  42
  43   count = __init_array_end - __init_array_start;
  44   for (i = 0; i < count; i++)
  45     __init_array_start[i] ();
  46 }
  47 #endif