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/* Initialization code run first thing by the ELF startup code. Linux version.
Copyright (C) 1995-1999, 2000, 2001 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 "kernel-features.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));
extern int _dl_starting_up;
weak_extern (_dl_starting_up)
extern fpu_control_t _dl_fpu_control;
extern int _dl_fpu_control_set;
/* 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 = 1;
/* Remember the command line argument and enviroment contents for
later calls of initializers for dynamic libraries. */
int __libc_argc;
char **__libc_argv;
static void
init (int argc, char **argv, char **envp)
{
extern void __getopt_clean_environment (char **);
/* 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. */
int *dummy_addr = &_dl_starting_up;
__libc_multiple_libcs = dummy_addr && !_dl_starting_up;
/* Make sure we don't initialize twice. */
if (!__libc_multiple_libcs)
{
#ifndef SHARED
DL_SYSDEP_OSCHECK (__libc_fatal);
#endif
/* Set the FPU control word to the proper default value if the
kernel would use a different value. (In a static program we
don't have this information.) */
#ifdef SHARED
if (__fpu_control != _dl_fpu_control)
#endif
__setfpucw (__fpu_control);
}
/* Save the command-line arguments. */
__libc_argc = argc;
__libc_argv = argv;
__environ = envp;
#ifndef SHARED
__libc_init_secure ();
#endif
__libc_init (argc, argv, envp);
/* This is a hack to make the special getopt in GNU libc working. */
__getopt_clean_environment (envp);
#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
/* This function is defined here so that if this file ever gets into
ld.so we will get a link error. Having this file silently included
in ld.so causes disaster, because the _init definition above will
cause ld.so to gain an init function, which is not a cool thing. */
extern void _dl_start (void) __attribute__ ((noreturn));
void
_dl_start (void)
{
abort ();
}
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