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 "notes.h" 27 28 extern int main(int, char **, char **); 29 30 extern void (*__preinit_array_start []) (int, char **, char **) __dso_hidden; 31 extern void (*__preinit_array_end []) (int, char **, char **) __dso_hidden; 32 extern void (*__init_array_start []) (int, char **, char **) __dso_hidden; 33 extern void (*__init_array_end []) (int, char **, char **) __dso_hidden; 34 extern void (*__fini_array_start []) (void) __dso_hidden; 35 extern void (*__fini_array_end []) (void) __dso_hidden; 36 extern void _fini(void); 37 extern void _init(void); 38 39 extern int _DYNAMIC; 40 #pragma weak _DYNAMIC 41 42 char **environ; 43 const char *__progname = ""; 44 45 static void 46 finalizer(void) 47 { 48 void (*fn)(void); 49 size_t array_size, n; 50 51 array_size = __fini_array_end - __fini_array_start; 52 for (n = array_size; n > 0; n--) { 53 fn = __fini_array_start[n - 1]; 54 if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1) 55 (fn)(); 56 } 57 _fini(); 58 } 59 60 static inline void 61 handle_static_init(int argc, char **argv, char **env) 62 { 63 void (*fn)(int, char **, char **); 64 size_t array_size, n; 65 66 if (&_DYNAMIC != NULL) 67 return; 68 69 atexit(finalizer); 70 71 array_size = __preinit_array_end - __preinit_array_start; 72 for (n = 0; n < array_size; n++) { 73 fn = __preinit_array_start[n]; 74 if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1) 75 fn(argc, argv, env); 76 } 77 _init(); 78 array_size = __init_array_end - __init_array_start; 79 for (n = 0; n < array_size; n++) { 80 fn = __init_array_start[n]; 81 if ((uintptr_t)fn != 0 && (uintptr_t)fn != 1) 82 fn(argc, argv, env); 83 } 84 } 85 86 static inline void 87 handle_argv(int argc, char *argv[], char **env) 88 { 89 const char *s; 90 91 if (environ == NULL) 92 environ = env; 93 if (argc > 0 && argv[0] != NULL) { 94 __progname = argv[0]; 95 for (s = __progname; *s != '\0'; s++) { 96 if (*s == '/') 97 __progname = s + 1; 98 } 99 } 100 } 101 102 static const struct { 103 int32_t namesz; 104 int32_t descsz; 105 int32_t type; 106 char name[sizeof(NOTE_VENDOR)]; 107 uint32_t desc; 108 } crt_noinit_tag __attribute__ ((section (NOTE_SECTION), 109 aligned(4))) __attribute__ ((used)) = { 110 .namesz = sizeof(NOTE_VENDOR), 111 .descsz = sizeof(uint32_t), 112 .type = CRT_NOINIT_NOTETYPE, 113 .name = NOTE_VENDOR, 114 .desc = 0 115 }; 116