init-first.c

Glibc 2.3.2源代码(解压后有100多M)

/* Initialization code run first thing by the XCOFF startup code.  AIX version.
   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sysdep.h>
#include <fpu_control.h>
#include <sys/param.h>
#include <sys/types.h>
#include <libc-internal.h>

#ifndef SHARED
# include <ldsodefs.h>
# include "dl-osinfo.h"
#endif

extern void __libc_init (int, char **, char **);

/* The function is called from assembly stubs the compiler can't see.  */
static void init (int, char **, char **) __attribute__ ((unused));

/* Set nonzero if we have to be prepared for more then one libc being
   used in the process.  Safe assumption if initializer never runs.  */
int __libc_multiple_libcs attribute_hidden = 1;

/* Remember the command line argument and enviroment contents for
   later calls of initializers for dynamic libraries.  */
int __libc_argc attribute_hidden;
char **__libc_argv attribute_hidden;


static void
init (int argc, char **argv, char **envp)
{
#ifdef USE_NONOPTION_FLAGS
  extern void __getopt_clean_environment (char **);
#endif
  /* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
     If the address would be taken inside the expression the optimizer
     would try to be too smart and throws it away.  Grrr.  */

  /* XXX disable dl for now
  __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; */

  /* Save the command-line arguments.  */
  __libc_argc = argc;
  __libc_argv = argv;
  __environ = envp;

#ifndef SHARED
  __libc_init_secure ();
#endif

  __libc_init (argc, argv, envp);

#ifdef USE_NONOPTION_FLAGS
  /* This is a hack to make the special getopt in GNU libc working.  */
  __getopt_clean_environment (envp);
#endif

#ifdef SHARED
  __libc_global_ctors ();
#endif
}

#ifdef SHARED

strong_alias (init, _init);

extern void __libc_init_first (void);

void
__libc_init_first (void)
{
}

#else
extern void __libc_init_first (int argc, char **argv, char **envp);

void
__libc_init_first (int argc, char **argv, char **envp)
{
  init (argc, argv, envp);
}
#endif