sysdeps/generic/init-first.c

   1 /* Initialization code run first thing by the ELF startup code.  Stub version.
   2    Copyright (C) 1995, 1997, 1998 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <unistd.h>
  21 #include <sys/types.h>
  22
  23 int __libc_multiple_libcs = 1;
  24
  25 extern void __libc_init (int, char **, char **);
  26 extern void __getopt_clean_environment (char **);
  27
  28 #ifdef PIC
  29 void
  30 __libc_init_first (void)
  31 {
  32 }
  33 #endif
  34
  35 #ifdef PIC
  36 /* NOTE!  The linker notices the magical name `_init' and sets the DT_INIT
  37    pointer in the dynamic section based solely on that.  It is convention
  38    for this function to be in the `.init' section, but the symbol name is
  39    the only thing that really matters!!  */
  40 void _init
  41 #else
  42 void __libc_init_first
  43 #endif
  44 (int argc, char *arg0, ...)
  45 {
  46   char **argv = &arg0, **envp = &argv[argc + 1];
  47
  48   __environ = envp;
  49   __libc_init (argc, argv, envp);
  50
  51   /* This is a hack to make the special getopt in GNU libc working.  */
  52   __getopt_clean_environment (envp);
  53 }