sysdeps/generic/init-first.c

   1 /* Initialization code run first thing by the ELF startup code.  Stub version.
   2    Copyright (C) 1995, 1997, 1998, 2001, 2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <unistd.h>
  21 #include <sys/types.h>
  22
  23 int __libc_multiple_libcs attribute_hidden = 1;
  24
  25 extern void __libc_init (int, char **, char **);
  26 #ifdef USE_NONOPTION_FLAGS
  27 extern void __getopt_clean_environment (char **);
  28 #endif
  29
  30 #ifdef SHARED
  31 void
  32 __libc_init_first (void)
  33 {
  34 }
  35 #endif
  36
  37 #ifdef SHARED
  38 /* NOTE!  The linker notices the magical name `_init' and sets the DT_INIT
  39    pointer in the dynamic section based solely on that.  It is convention
  40    for this function to be in the `.init' section, but the symbol name is
  41    the only thing that really matters!!  */
  42 void _init
  43 #else
  44 void __libc_init_first
  45 #endif
  46 (int argc, char *arg0, ...)
  47 {
  48   char **argv = &arg0, **envp = &argv[argc + 1];
  49
  50   __environ = envp;
  51   __libc_init (argc, argv, envp);
  52
  53 #ifdef USE_NONOPTION_FLAGS
  54   /* This is a hack to make the special getopt in GNU libc working.  */
  55   __getopt_clean_environment (envp);
  56 #endif
  57 }