mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 08:11:08 +00:00
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/* Initialization code run first thing by the ELF startup code. Linux version.
|
|
Copyright (C) 1995-2004, 2005, 2007, 2011 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <ctype.h>
|
|
#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>
|
|
|
|
#include <ldsodefs.h>
|
|
|
|
/* 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;
|
|
|
|
|
|
void
|
|
__libc_init_first (int argc, char **argv, char **envp)
|
|
{
|
|
#ifdef SHARED
|
|
/* For DSOs we do not need __libc_init_first but instead _init. */
|
|
}
|
|
|
|
void
|
|
attribute_hidden
|
|
_init (int argc, char **argv, char **envp)
|
|
{
|
|
#endif
|
|
#ifdef USE_NONOPTION_FLAGS
|
|
extern void __getopt_clean_environment (char **);
|
|
#endif
|
|
|
|
__libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up;
|
|
|
|
/* Make sure we don't initialize twice. */
|
|
if (!__libc_multiple_libcs)
|
|
{
|
|
/* 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 != GLRO(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 ();
|
|
|
|
/* First the initialization which normally would be done by the
|
|
dynamic linker. */
|
|
_dl_non_dynamic_init ();
|
|
#endif
|
|
|
|
#ifdef VDSO_SETUP
|
|
VDSO_SETUP ();
|
|
#endif
|
|
|
|
__init_misc (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
|
|
|
|
/* Initialize ctype data. */
|
|
__ctype_init ();
|
|
|
|
#if defined SHARED && !defined NO_CTORS_DTORS_SECTIONS
|
|
__libc_global_ctors ();
|
|
#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 ();
|
|
}
|