sysdeps/mips/init-first.c

   1 /* Initialization code run first thing by the ELF startup code.  For mips/Unix.
   2    Copyright (C) 1996, 1997 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
  22 extern void __libc_init (int, char **, char **);
  23 extern void __libc_global_ctors (void);
  24
  25
  26 static void
  27 init (int *data)
  28 {
  29   int argc = *data;
  30   char **argv = (void *) (data + 1);
  31   char **envp = &argv[argc + 1];
  32
  33   __environ = envp;
  34   __libc_init (argc, argv, envp);
  35 }
  36
  37 #ifdef PIC
  38 /* This function is called to initialize the shared C library.
  39    It is called just before the user _start code from mips/elf/start.S,
  40    with the stack set up as that code gets it.  */
  41
  42 /* NOTE!  The linker notices the magical name `_init' and sets the DT_INIT
  43    pointer in the dynamic section based solely on that.  It is convention
  44    for this function to be in the `.init' section, but the symbol name is
  45    the only thing that really matters!!  */
  46 /*void _init (int argc, ...) __attribute__ ((unused, section (".init")));*/
  47
  48 void
  49 _init (int argc, ...)
  50 {
  51   init (&argc);
  52
  53   __libc_global_ctors ();
  54 }
  55 #endif
  56
  57
  58 void
  59 __libc_init_first (int argc __attribute__ ((unused)), ...)
  60 {
  61 #ifndef PIC
  62   init (&argc);
  63 #endif
  64 }