xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Initialization code run first thing by the ELF startup code. Common version |
| 2 | Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 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. |
| 9 | |
| 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. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <ctype.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <fcntl.h> |
| 23 | #include <unistd.h> |
| 24 | #include <sysdep.h> |
| 25 | #include <fpu_control.h> |
| 26 | #include <sys/param.h> |
| 27 | #include <sys/types.h> |
| 28 | #include <libc-internal.h> |
| 29 | |
| 30 | #include <ldsodefs.h> |
| 31 | |
| 32 | /* Set nonzero if we have to be prepared for more than one libc being |
| 33 | used in the process. Safe assumption if initializer never runs. */ |
| 34 | int __libc_multiple_libcs attribute_hidden = 1; |
| 35 | |
| 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 | |
| 41 | |
| 42 | void |
| 43 | __libc_init_first (int argc, char **argv, char **envp) |
| 44 | { |
| 45 | #ifdef SHARED |
| 46 | /* For DSOs we do not need __libc_init_first but instead _init. */ |
| 47 | } |
| 48 | |
| 49 | void |
| 50 | attribute_hidden |
| 51 | _init (int argc, char **argv, char **envp) |
| 52 | { |
| 53 | #endif |
| 54 | #ifdef USE_NONOPTION_FLAGS |
| 55 | extern void __getopt_clean_environment (char **); |
| 56 | #endif |
| 57 | |
| 58 | __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; |
| 59 | |
| 60 | /* Make sure we don't initialize twice. */ |
| 61 | if (!__libc_multiple_libcs) |
| 62 | { |
| 63 | /* Set the FPU control word to the proper default value if the |
| 64 | kernel would use a different value. */ |
| 65 | if (__fpu_control != GLRO(dl_fpu_control)) |
| 66 | __setfpucw (__fpu_control); |
| 67 | } |
| 68 | |
| 69 | /* Save the command-line arguments. */ |
| 70 | __libc_argc = argc; |
| 71 | __libc_argv = argv; |
| 72 | __environ = envp; |
| 73 | |
| 74 | #ifndef SHARED |
| 75 | __libc_init_secure (); |
| 76 | |
| 77 | /* First the initialization which normally would be done by the |
| 78 | dynamic linker. */ |
| 79 | _dl_non_dynamic_init (); |
| 80 | #endif |
| 81 | |
| 82 | #ifdef VDSO_SETUP |
| 83 | VDSO_SETUP (); |
| 84 | #endif |
| 85 | |
| 86 | __init_misc (argc, argv, envp); |
| 87 | |
| 88 | #ifdef USE_NONOPTION_FLAGS |
| 89 | /* This is a hack to make the special getopt in GNU libc working. */ |
| 90 | __getopt_clean_environment (envp); |
| 91 | #endif |
| 92 | |
| 93 | /* Initialize ctype data. */ |
| 94 | __ctype_init (); |
| 95 | |
| 96 | #if defined SHARED && !defined NO_CTORS_DTORS_SECTIONS |
| 97 | __libc_global_ctors (); |
| 98 | #endif |
| 99 | } |
| 100 | |
| 101 | /* This function is defined here so that if this file ever gets into |
| 102 | ld.so we will get a link error. Having this file silently included |
| 103 | in ld.so causes disaster, because the _init definition above will |
| 104 | cause ld.so to gain an init function, which is not a cool thing. */ |
| 105 | |
| 106 | extern void _dl_start (void) __attribute__ ((noreturn)); |
| 107 | |
| 108 | void |
| 109 | _dl_start (void) |
| 110 | { |
| 111 | abort (); |
| 112 | } |