1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* Initialization code run first thing by the ELF startup code. Linux version.
Copyright (C) 1995-1999, 2000, 2001, 2002 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>
#include <ldsodefs.h>
#ifndef SHARED
# 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 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)
{
#ifdef USE_NONOPTION_FLAGS
extern void __getopt_clean_environment (char **);
#endif
/* 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 != GL(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);
#ifdef USE_NONOPTION_FLAGS
/* This is a hack to make the special getopt in GNU libc working. */
__getopt_clean_environment (envp);
#endif
#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 ();
}
|
