| 1 | /* Initialization code run first thing by the ELF startup code. Common version |
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| 2 | Copyright (C) 1995-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <stdio.h> |
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| 20 | #include <stdlib.h> |
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| 21 | #include <fcntl.h> |
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| 22 | #include <unistd.h> |
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| 23 | #include <sysdep.h> |
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| 24 | #include <fpu_control.h> |
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| 25 | #include <sys/param.h> |
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| 26 | #include <sys/types.h> |
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| 27 | #include <libc-internal.h> |
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| 28 | |
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| 29 | #include <ldsodefs.h> |
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| 30 | |
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| 31 | /* Remember the command line argument and environment contents for |
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| 32 | later calls of initializers for dynamic libraries. */ |
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| 33 | int __libc_argc attribute_hidden; |
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| 34 | char **__libc_argv attribute_hidden; |
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| 35 | |
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| 36 | |
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| 37 | void |
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| 38 | __libc_init_first (int argc, char **argv, char **envp) |
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| 39 | { |
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| 40 | #ifdef SHARED |
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| 41 | /* For DSOs we do not need __libc_init_first but an ELF constructor. */ |
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| 42 | } |
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| 43 | |
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| 44 | static void __attribute__ ((constructor)) |
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| 45 | _init_first (int argc, char **argv, char **envp) |
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| 46 | { |
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| 47 | #endif |
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| 48 | |
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| 49 | /* Make sure we don't initialize twice. */ |
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| 50 | #ifdef SHARED |
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| 51 | if (__libc_initial) |
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| 52 | { |
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| 53 | /* Set the FPU control word to the proper default value if the |
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| 54 | kernel would use a different value. */ |
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| 55 | if (__fpu_control != GLRO(dl_fpu_control)) |
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| 56 | __setfpucw (__fpu_control); |
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| 57 | } |
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| 58 | #endif |
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| 59 | |
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| 60 | /* Save the command-line arguments. */ |
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| 61 | __libc_argc = argc; |
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| 62 | __libc_argv = argv; |
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| 63 | __environ = envp; |
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| 64 | |
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| 65 | #ifndef SHARED |
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| 66 | /* First the initialization which normally would be done by the |
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| 67 | dynamic linker. */ |
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| 68 | _dl_non_dynamic_init (); |
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| 69 | #endif |
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| 70 | |
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| 71 | __init_misc (argc, argv, envp); |
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| 72 | } |
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| 73 | |
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| 74 | /* This function is defined here so that if this file ever gets into |
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| 75 | ld.so we will get a link error. Having this file silently included |
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| 76 | in ld.so causes disaster, because the _init_first definition above |
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| 77 | will cause ld.so to gain an ELF constructor, which is not a cool |
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| 78 | thing. */ |
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| 79 | |
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| 80 | extern void _dl_start (void) __attribute__ ((noreturn)); |
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| 81 | |
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| 82 | void |
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| 83 | _dl_start (void) |
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| 84 | { |
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| 85 | abort (); |
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| 86 | } |
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| 87 | |
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