sysdeps/unix/sysv/aix/init-first.c

   1 /* Initialization code run first thing by the XCOFF startup code.  AIX version.
   2    Copyright (C) 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 <stdio.h>
  21 #include <stdlib.h>
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24 #include <sysdep.h>
  25 #include <fpu_control.h>
  26 #include <sys/param.h>
  27 #include <sys/types.h>
  28 #include <libc-internal.h>
  29
  30 #ifndef SHARED
  31 # include <ldsodefs.h>
  32 # include "dl-osinfo.h"
  33 #endif
  34
  35 extern void __libc_init (int, char **, char **);
  36
  37 /* The function is called from assembly stubs the compiler can't see.  */
  38 static void init (int, char **, char **) __attribute__ ((unused));
  39
  40 /* Set nonzero if we have to be prepared for more then one libc being
  41    used in the process.  Safe assumption if initializer never runs.  */
  42 int __libc_multiple_libcs attribute_hidden = 1;
  43
  44 /* Remember the command line argument and enviroment contents for
  45    later calls of initializers for dynamic libraries.  */
  46 int __libc_argc attribute_hidden;
  47 char **__libc_argv attribute_hidden;
  48
  49
  50 static void
  51 init (int argc, char **argv, char **envp)
  52 {
  53 #ifdef USE_NONOPTION_FLAGS
  54   extern void __getopt_clean_environment (char **);
  55 #endif
  56   /* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
  57      If the address would be taken inside the expression the optimizer
  58      would try to be too smart and throws it away.  Grrr.  */
  59
  60   /* XXX disable dl for now
  61   __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; */
  62
  63   /* Save the command-line arguments.  */
  64   __libc_argc = argc;
  65   __libc_argv = argv;
  66   __environ = envp;
  67
  68 #ifndef SHARED
  69   __libc_init_secure ();
  70 #endif
  71
  72   __libc_init (argc, argv, envp);
  73
  74 #ifdef USE_NONOPTION_FLAGS
  75   /* This is a hack to make the special getopt in GNU libc working.  */
  76   __getopt_clean_environment (envp);
  77 #endif
  78
  79 #ifdef SHARED
  80   __libc_global_ctors ();
  81 #endif
  82 }
  83
  84 #ifdef SHARED
  85
  86 strong_alias (init, _init);
  87
  88 extern void __libc_init_first (void);
  89
  90 void
  91 __libc_init_first (void)
  92 {
  93 }
  94
  95 #else
  96 extern void __libc_init_first (int argc, char **argv, char **envp);
  97
  98 void
  99 __libc_init_first (int argc, char **argv, char **envp)
 100 {
 101   init (argc, argv, envp);
 102 }
 103 #endif