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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/* Initialization code run first thing by the ELF startup code. Linux version.
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Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sysdep.h>
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#include <fpu_control.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include "kernel-features.h"
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#include <libc-internal.h>
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#ifndef SHARED
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# include <ldsodefs.h>
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# include "dl-osinfo.h"
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#endif
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extern void __libc_init (int, char **, char **);
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/* The function is called from assembly stubs the compiler can't see. */
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static void init (int, char **, char **) __attribute__ ((unused));
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extern int _dl_starting_up;
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weak_extern (_dl_starting_up)
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extern fpu_control_t _dl_fpu_control;
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extern int _dl_fpu_control_set;
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/* Set nonzero if we have to be prepared for more then one libc being
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used in the process. Safe assumption if initializer never runs. */
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int __libc_multiple_libcs = 1;
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/* Remember the command line argument and enviroment contents for
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later calls of initializers for dynamic libraries. */
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int __libc_argc;
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char **__libc_argv;
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static void
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init (int argc, char **argv, char **envp)
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{
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extern void __getopt_clean_environment (char **);
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/* The next variable is only here to work around a bug in gcc <= 2.7.2.2.
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If the address would be taken inside the expression the optimizer
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would try to be too smart and throws it away. Grrr. */
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int *dummy_addr = &_dl_starting_up;
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__libc_multiple_libcs = dummy_addr && !_dl_starting_up;
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/* Make sure we don't initialize twice. */
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if (!__libc_multiple_libcs)
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{
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#ifndef SHARED
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DL_SYSDEP_OSCHECK (__libc_fatal);
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#endif
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/* Set the FPU control word to the proper default value if the
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kernel would use a different value. (In a static program we
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don't have this information.) */
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#ifdef SHARED
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if (__fpu_control != _dl_fpu_control)
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#endif
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__setfpucw (__fpu_control);
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}
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/* Save the command-line arguments. */
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__libc_argc = argc;
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__libc_argv = argv;
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__environ = envp;
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#ifndef SHARED
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__libc_init_secure ();
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#endif
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__libc_init (argc, argv, envp);
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/* This is a hack to make the special getopt in GNU libc working. */
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__getopt_clean_environment (envp);
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#ifdef SHARED
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__libc_global_ctors ();
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#endif
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}
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#ifdef SHARED
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strong_alias (init, _init);
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extern void __libc_init_first (void);
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void
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__libc_init_first (void)
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{
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}
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#else
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extern void __libc_init_first (int argc, char **argv, char **envp);
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void
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__libc_init_first (int argc, char **argv, char **envp)
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{
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init (argc, argv, envp);
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}
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#endif
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/* This function is defined here so that if this file ever gets into
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ld.so we will get a link error. Having this file silently included
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in ld.so causes disaster, because the _init definition above will
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cause ld.so to gain an init function, which is not a cool thing. */
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extern void _dl_start (void) __attribute__ ((noreturn));
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void
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_dl_start (void)
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{
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abort ();
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}
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