1 /* Initialization code run first thing by the ELF startup code. Linux version.
2 Copyright (C) 1995-1999,2000,01,02 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
25 #include <fpu_control.h>
26 #include <sys/param.h>
27 #include <sys/types.h>
28 #include <libc-internal.h>
32 /* The function is called from assembly stubs the compiler can't see. */
33 static void init (int, char **, char **) __attribute__ ((unused));
35 /* Set nonzero if we have to be prepared for more then one libc being
36 used in the process. Safe assumption if initializer never runs. */
37 int __libc_multiple_libcs attribute_hidden = 1;
39 /* Remember the command line argument and enviroment contents for
40 later calls of initializers for dynamic libraries. */
41 int __libc_argc attribute_hidden;
42 char **__libc_argv attribute_hidden;
46 init (int argc, char **argv, char **envp)
48 #ifdef USE_NONOPTION_FLAGS
49 extern void __getopt_clean_environment (char **);
52 __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up;
54 /* Make sure we don't initialize twice. */
55 if (!__libc_multiple_libcs)
57 /* Set the FPU control word to the proper default value if the
58 kernel would use a different value. (In a static program we
59 don't have this information.) */
61 if (__fpu_control != GL(dl_fpu_control))
63 __setfpucw (__fpu_control);
66 /* Save the command-line arguments. */
72 __libc_init_secure ();
74 /* First the initialization which normally would be done by the
76 _dl_non_dynamic_init ();
79 __init_misc (argc, argv, envp);
81 #ifdef USE_NONOPTION_FLAGS
82 /* This is a hack to make the special getopt in GNU libc working. */
83 __getopt_clean_environment (envp);
87 __libc_global_ctors ();
93 strong_alias (init, _init);
95 extern void __libc_init_first (void);
98 __libc_init_first (void)
103 extern void __libc_init_first (int argc, char **argv, char **envp);
106 __libc_init_first (int argc, char **argv, char **envp)
108 init (argc, argv, envp);
113 /* This function is defined here so that if this file ever gets into
114 ld.so we will get a link error. Having this file silently included
115 in ld.so causes disaster, because the _init definition above will
116 cause ld.so to gain an init function, which is not a cool thing. */
118 extern void _dl_start (void) __attribute__ ((noreturn));