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/* Initialization code run first thing by the ELF startup code. Common version
Copyright (C) 1995-2020 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
<https://www.gnu.org/licenses/>. */
#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 than 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 an ELF constructor. */
}
static void __attribute__ ((constructor))
_init_first (int argc, char **argv, char **envp)
{
#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. */
if (__fpu_control != GLRO(dl_fpu_control))
__setfpucw (__fpu_control);
}
/* Save the command-line arguments. */
__libc_argc = argc;
__libc_argv = argv;
__environ = envp;
#ifndef SHARED
/* First the initialization which normally would be done by the
dynamic linker. */
_dl_non_dynamic_init ();
#endif
__init_misc (argc, argv, envp);
#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_first definition above
will cause ld.so to gain an ELF constructor, which is not a cool
thing. */
extern void _dl_start (void) __attribute__ ((noreturn));
void
_dl_start (void)
{
abort ();
}
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