1/*- 2 * Copyright 2012 Konstantin Belousov <kib@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD: stable/11/lib/csu/common/ignore_init.c 339300 2018-10-11 00:26:15Z emaste $"); 28 29#include <sys/param.h> 30#include <sys/elf_common.h> 31#include "notes.h" 32 33extern int main(int, char **, char **); 34 35extern void (*__preinit_array_start[])(int, char **, char **) __hidden; 36extern void (*__preinit_array_end[])(int, char **, char **) __hidden; 37extern void (*__init_array_start[])(int, char **, char **) __hidden; 38extern void (*__init_array_end[])(int, char **, char **) __hidden; 39extern void (*__fini_array_start[])(void) __hidden; 40extern void (*__fini_array_end[])(void) __hidden; 41extern void _fini(void) __hidden; 42extern void _init(void) __hidden; 43 44extern int _DYNAMIC; 45#pragma weak _DYNAMIC 46 47char **environ; 48const char *__progname = ""; 49 50static void 51finalizer(void) 52{ 53 void (*fn)(void); 54 size_t array_size, n; 55 56 array_size = __fini_array_end - __fini_array_start; 57 for (n = array_size; n > 0; n--) { 58 fn = __fini_array_start[n - 1]; 59 if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1) 60 (fn)(); 61 } 62 _fini(); 63} 64 65static inline void 66handle_static_init(int argc, char **argv, char **env) 67{ 68 void (*fn)(int, char **, char **); 69 size_t array_size, n; 70 71 if (&_DYNAMIC != NULL) 72 return; 73 74 atexit(finalizer); 75 76 array_size = __preinit_array_end - __preinit_array_start; 77 for (n = 0; n < array_size; n++) { 78 fn = __preinit_array_start[n]; 79 if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1) 80 fn(argc, argv, env); 81 } 82 _init(); 83 array_size = __init_array_end - __init_array_start; 84 for (n = 0; n < array_size; n++) { 85 fn = __init_array_start[n]; 86 if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1) 87 fn(argc, argv, env); 88 } 89} 90 91static inline void 92handle_argv(int argc, char *argv[], char **env) 93{ 94 const char *s; 95 96 if (environ == NULL) 97 environ = env; 98 if (argc > 0 && argv[0] != NULL) { 99 __progname = argv[0]; 100 for (s = __progname; *s != '\0'; s++) { 101 if (*s == '/') 102 __progname = s + 1; 103 } 104 } 105} 106 107static const struct { 108 int32_t namesz; 109 int32_t descsz; 110 int32_t type; 111 char name[sizeof(NOTE_FREEBSD_VENDOR)]; 112 uint32_t desc; 113} crt_noinit_tag __attribute__ ((section (NOTE_SECTION), 114 aligned(4))) __used = { 115 .namesz = sizeof(NOTE_FREEBSD_VENDOR), 116 .descsz = sizeof(uint32_t), 117 .type = NT_FREEBSD_NOINIT_TAG, 118 .name = NOTE_FREEBSD_VENDOR, 119 .desc = 0 120}; 121