ldd_elfxx.c revision 1.2
1 /* $NetBSD: ldd_elfxx.c,v 1.2 2009/02/03 03:01:02 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright 1996 John D. Polstra. 34 * Copyright 1996 Matt Thomas <matt (at) 3am-software.com> 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by John Polstra. 48 * 4. The name of the author may not be used to endorse or promote products 49 * derived from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 60 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 #ifndef lint 65 __RCSID("$NetBSD: ldd_elfxx.c,v 1.2 2009/02/03 03:01:02 mrg Exp $"); 66 #endif /* not lint */ 67 68 #include <sys/types.h> 69 #include <sys/mman.h> 70 #include <sys/wait.h> 71 72 #include <a.out.h> 73 #include <dirent.h> 74 #include <err.h> 75 #include <errno.h> 76 #include <fcntl.h> 77 #include <stdarg.h> 78 #include <stdio.h> 79 #include <stdlib.h> 80 #include <string.h> 81 #include <unistd.h> 82 #include <ctype.h> 83 84 #include "debug.h" 85 #include "rtld.h" 86 #include "ldd.h" 87 88 /* 89 * elfxx_ldd() - bit-size independant ELF ldd implementation. 90 * returns 0 on success and -1 on failure. 91 */ 92 int 93 ELFNAME(ldd)(int fd, char *path, char *fmt1, char *fmt2) 94 { 95 struct stat st; 96 97 if (lseek(fd, 0, SEEK_SET) < 0 || 98 fstat(fd, &st) < 0) { 99 _rtld_error("%s: %s", path, strerror(errno)); 100 return -1; 101 } 102 103 _rtld_pagesz = sysconf(_SC_PAGESIZE); 104 105 #ifdef RTLD_ARCH_SUBDIR 106 _rtld_add_paths(path, &_rtld_default_paths, 107 RTLD_DEFAULT_LIBRARY_PATH "/" RTLD_ARCH_SUBDIR); 108 #endif 109 _rtld_add_paths(path, &_rtld_default_paths, RTLD_DEFAULT_LIBRARY_PATH); 110 111 _rtld_paths = NULL; 112 _rtld_trust = (st.st_mode & (S_ISUID | S_ISGID)) == 0; 113 if (_rtld_trust) 114 _rtld_add_paths(path, &_rtld_paths, getenv("LD_LIBRARY_PATH")); 115 116 _rtld_process_hints(path, &_rtld_paths, &_rtld_xforms, _PATH_LD_HINTS); 117 _rtld_objmain = _rtld_map_object(xstrdup(path), fd, &st); 118 if (_rtld_objmain == NULL) 119 return -1; 120 121 _rtld_objmain->path = xstrdup(path); 122 _rtld_digest_dynamic(path, _rtld_objmain); 123 124 /* Link the main program into the list of objects. */ 125 *_rtld_objtail = _rtld_objmain; 126 _rtld_objtail = &_rtld_objmain->next; 127 ++_rtld_objmain->refcount; 128 129 (void) _rtld_load_needed_objects(_rtld_objmain, 0); 130 131 if (fmt1 == NULL) 132 printf("%s:\n", _rtld_objmain->path); 133 main_local = path; 134 main_progname = _rtld_objmain->path; 135 print_needed(_rtld_objmain, fmt1, fmt2); 136 137 while (_rtld_objlist != NULL) { 138 Obj_Entry *obj = _rtld_objlist; 139 _rtld_objlist = obj->next; 140 while (obj->rpaths != NULL) { 141 const Search_Path *rpath = obj->rpaths; 142 obj->rpaths = rpath->sp_next; 143 xfree(__UNCONST(rpath->sp_path)); 144 xfree(__UNCONST(rpath)); 145 } 146 while (obj->needed != NULL) { 147 const Needed_Entry *needed = obj->needed; 148 obj->needed = needed->next; 149 xfree(__UNCONST(needed)); 150 } 151 (void) munmap(obj->mapbase, obj->mapsize); 152 xfree(obj->path); 153 xfree(obj); 154 } 155 156 _rtld_objmain = NULL; 157 _rtld_objtail = &_rtld_objlist; 158 /* Need to free _rtld_paths? */ 159 160 return 0; 161 } 162
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