1 /* $NetBSD: loadfile.c,v 1.21 2002/12/11 09:55:20 pk Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center and by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * Ralph Campbell. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the University of 58 * California, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 * 75 * @(#)boot.c 8.1 (Berkeley) 6/10/93 76 */ 77 78 #ifdef _STANDALONE 79 #include <lib/libsa/stand.h> 80 #include <lib/libkern/libkern.h> 81 #else 82 #include <stdio.h> 83 #include <string.h> 84 #include <errno.h> 85 #include <stdlib.h> 86 #include <unistd.h> 87 #include <fcntl.h> 88 #include <err.h> 89 #endif 90 91 #include <sys/param.h> 92 #include <sys/exec.h> 93 94 #include "loadfile.h" 95 96 /* 97 * Open 'filename', read in program and return the opened file 98 * descriptor if ok, or -1 on error. 99 * Fill in marks 100 */ 101 int 102 loadfile(fname, marks, flags) 103 const char *fname; 104 u_long *marks; 105 int flags; 106 { 107 union { 108 #ifdef BOOT_ECOFF 109 struct ecoff_exechdr coff; 110 #endif 111 #ifdef BOOT_ELF32 112 Elf32_Ehdr elf32; 113 #endif 114 #ifdef BOOT_ELF64 115 Elf64_Ehdr elf64; 116 #endif 117 #ifdef BOOT_AOUT 118 struct exec aout; 119 #endif 120 } hdr; 121 ssize_t nr; 122 int fd, rval; 123 124 /* Open the file. */ 125 if ((fd = open(fname, 0)) < 0) { 126 WARN(("open %s", fname ? fname : "<default>")); 127 return -1; 128 } 129 130 /* Read the exec header. */ 131 if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) { 132 WARN(("read header")); 133 goto err; 134 } 135 136 #ifdef BOOT_ECOFF 137 if (!ECOFF_BADMAG(&hdr.coff)) { 138 rval = loadfile_coff(fd, &hdr.coff, marks, flags); 139 } else 140 #endif 141 #ifdef BOOT_ELF32 142 if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 && 143 hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) { 144 rval = loadfile_elf32(fd, &hdr.elf32, marks, flags); 145 } else 146 #endif 147 #ifdef BOOT_ELF64 148 if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 && 149 hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) { 150 rval = loadfile_elf64(fd, &hdr.elf64, marks, flags); 151 } else 152 #endif 153 #ifdef BOOT_AOUT 154 if (OKMAGIC(N_GETMAGIC(hdr.aout)) 155 #ifndef NO_MID_CHECK 156 && N_GETMID(hdr.aout) == MID_MACHINE 157 #endif 158 ) { 159 rval = loadfile_aout(fd, &hdr.aout, marks, flags); 160 } else 161 #endif 162 { 163 rval = 1; 164 errno = EFTYPE; 165 WARN(("%s", fname ? fname : "<default>")); 166 } 167 168 if (rval == 0) { 169 if ((flags & LOAD_ALL) != 0) 170 PROGRESS(("=0x%lx\n", 171 marks[MARK_END] - marks[MARK_START])); 172 return fd; 173 } 174 err: 175 (void)close(fd); 176 return -1; 177 } 178