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93c65d43 | 1 | /* Initialization code run first thing by the ELF startup code. Common version |
04277e02 | 2 | Copyright (C) 1995-2019 Free Software Foundation, Inc. |
7cc27f44 | 3 | This file is part of the GNU C Library. |
e4448b6f | 4 | |
7cc27f44 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
e4448b6f | 9 | |
7cc27f44 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
e4448b6f | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
e4448b6f | 18 | |
228c019e | 19 | #include <ctype.h> |
93c65d43 RM |
20 | #include <stdio.h> |
21 | #include <stdlib.h> | |
22 | #include <fcntl.h> | |
e4448b6f | 23 | #include <unistd.h> |
93c65d43 RM |
24 | #include <sysdep.h> |
25 | #include <fpu_control.h> | |
26 | #include <sys/param.h> | |
0413b54c | 27 | #include <sys/types.h> |
93c65d43 RM |
28 | #include <libc-internal.h> |
29 | ||
30 | #include <ldsodefs.h> | |
e4448b6f | 31 | |
f24a6d08 | 32 | /* Set nonzero if we have to be prepared for more than one libc being |
9ae10332 | 33 | used in the process. Safe assumption if initializer never runs. */ |
ab26a24a | 34 | int __libc_multiple_libcs attribute_hidden = 1; |
548330d3 | 35 | |
93c65d43 RM |
36 | /* Remember the command line argument and enviroment contents for |
37 | later calls of initializers for dynamic libraries. */ | |
38 | int __libc_argc attribute_hidden; | |
39 | char **__libc_argv attribute_hidden; | |
40 | ||
e4448b6f | 41 | |
e4448b6f | 42 | void |
93c65d43 | 43 | __libc_init_first (int argc, char **argv, char **envp) |
e4448b6f | 44 | { |
93c65d43 RM |
45 | #ifdef SHARED |
46 | /* For DSOs we do not need __libc_init_first but instead _init. */ | |
e4448b6f | 47 | } |
93c65d43 RM |
48 | |
49 | void | |
50 | attribute_hidden | |
51 | _init (int argc, char **argv, char **envp) | |
52 | { | |
e4448b6f RM |
53 | #endif |
54 | ||
93c65d43 RM |
55 | __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; |
56 | ||
57 | /* Make sure we don't initialize twice. */ | |
58 | if (!__libc_multiple_libcs) | |
59 | { | |
60 | /* Set the FPU control word to the proper default value if the | |
95e7cf29 | 61 | kernel would use a different value. */ |
93c65d43 | 62 | if (__fpu_control != GLRO(dl_fpu_control)) |
93c65d43 RM |
63 | __setfpucw (__fpu_control); |
64 | } | |
e4448b6f | 65 | |
93c65d43 RM |
66 | /* Save the command-line arguments. */ |
67 | __libc_argc = argc; | |
68 | __libc_argv = argv; | |
e4448b6f | 69 | __environ = envp; |
93c65d43 RM |
70 | |
71 | #ifndef SHARED | |
93c65d43 RM |
72 | /* First the initialization which normally would be done by the |
73 | dynamic linker. */ | |
74 | _dl_non_dynamic_init (); | |
75 | #endif | |
76 | ||
77 | #ifdef VDSO_SETUP | |
78 | VDSO_SETUP (); | |
79 | #endif | |
80 | ||
81 | __init_misc (argc, argv, envp); | |
7cc27f44 | 82 | |
228c019e TS |
83 | /* Initialize ctype data. */ |
84 | __ctype_init (); | |
93c65d43 RM |
85 | |
86 | #if defined SHARED && !defined NO_CTORS_DTORS_SECTIONS | |
87 | __libc_global_ctors (); | |
88 | #endif | |
89 | } | |
90 | ||
91 | /* This function is defined here so that if this file ever gets into | |
92 | ld.so we will get a link error. Having this file silently included | |
93 | in ld.so causes disaster, because the _init definition above will | |
94 | cause ld.so to gain an init function, which is not a cool thing. */ | |
95 | ||
96 | extern void _dl_start (void) __attribute__ ((noreturn)); | |
97 | ||
98 | void | |
99 | _dl_start (void) | |
100 | { | |
101 | abort (); | |
e4448b6f | 102 | } |