1/* $OpenBSD: crt0.c,v 1.18 2023/07/27 18:17:14 kettenis Exp $ */ 2 3/* 4 * Copyright (c) 1995 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou 18 * for the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#include <sys/syscall.h> 35#include <stdlib.h> 36#include <limits.h> 37 38#include "md_init.h" 39#ifdef RCRT0 40# include BOOT_H 41#endif 42#include "extern.h" 43 44#define STR(x) __STRING(x) /* shorter macro name for MD_RCRT0_START */ 45 46/* some defaults */ 47#ifndef MD_START_ARGS 48#define MD_START_ARGS \ 49 int argc, char **argv, char **envp, void (*cleanup)(void) 50#endif 51static void ___start(MD_START_ARGS) __used; 52#ifndef MD_EPROL_LABEL 53#define MD_EPROL_LABEL __asm(" .text\n_eprol:") 54#endif 55#ifndef RCRT0_RELRO 56#define RCRT0_RELRO() do {} while (0) 57#endif 58 59char ***_csu_finish(char **_argv, char **_envp, void (*_cleanup)(void)); 60 61#ifdef MCRT0 62#include <sys/gmon.h> 63extern __dso_hidden unsigned char _etext, _eprol; 64#endif /* MCRT0 */ 65 66#ifdef RCRT0 67#ifdef MD_RCRT0_START 68MD_RCRT0_START; 69#endif 70#else 71#ifdef MD_CRT0_START 72MD_CRT0_START; 73#endif 74#endif 75 76extern __dso_hidden initarray_f __preinit_array_start[], 77 __preinit_array_end[], __init_array_start[], __init_array_end[]; 78 79extern char __csu_do_fini_array __dso_hidden; 80 81static void 82___start(MD_START_ARGS) 83{ 84 size_t size, i; 85 char ***environp; 86#ifdef MD_START_SETUP 87 MD_START_SETUP 88#endif 89 90 environp = _csu_finish(argv, envp, cleanup); 91 92#ifndef RCRT0 93 if (cleanup == NULL) { 94#endif 95 size = __preinit_array_end - __preinit_array_start; 96 for (i = 0; i < size; i++) 97 __preinit_array_start[i](argc, argv, envp, NULL); 98 RCRT0_RELRO(); 99 size = __init_array_end - __init_array_start; 100 for (i = 0; i < size; i++) 101 __init_array_start[i](argc, argv, envp, NULL); 102 __csu_do_fini_array = 1; 103#ifndef RCRT0 104 } 105#endif 106 107#ifdef MCRT0 108 atexit(_mcleanup); 109 _monstartup((u_long)&_eprol, (u_long)&_etext); 110#endif 111 112 __init(); 113 114 exit(main(argc, argv, *environp)); 115} 116 117#ifdef MCRT0 118MD_EPROL_LABEL; 119#endif 120