1 /* $NetBSD: loadfile.c,v 1.32 2019/04/05 20:09:29 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 2008 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * Ralph Campbell. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)boot.c 8.1 (Berkeley) 6/10/93 65 */ 66 67 #ifdef _STANDALONE 68 #include <lib/libsa/stand.h> 69 #include <lib/libkern/libkern.h> 70 #else 71 #include <stdio.h> 72 #include <string.h> 73 #include <errno.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <fcntl.h> 77 #include <err.h> 78 #endif 79 80 #include <sys/param.h> 81 #include <sys/exec.h> 82 83 #include "loadfile.h" 84 85 uint32_t netbsd_version; 86 u_int netbsd_elf_class; 87 88 /* 89 * Open 'filename', read in program and return the opened file 90 * descriptor if ok, or -1 on error. 91 * Fill in marks 92 */ 93 int 94 loadfile(const char *fname, u_long *marks, int flags) 95 { 96 int fd, error; 97 98 /* Open the file. */ 99 if ((fd = open(fname, 0)) < 0) { 100 WARN(("open %s", fname ? fname : "<default>")); 101 return -1; 102 } 103 104 /* Load it; save the value of errno across the close() call */ 105 if ((error = fdloadfile(fd, marks, flags)) != 0) { 106 (void)close(fd); 107 errno = error; 108 return -1; 109 } 110 111 return fd; 112 } 113 114 /* 115 * Read in program from the given file descriptor. 116 * Return error code (0 on success). 117 * Fill in marks. 118 */ 119 int 120 fdloadfile(int fd, u_long *marks, int flags) 121 { 122 union { 123 #ifdef BOOT_ECOFF 124 struct ecoff_exechdr coff; 125 #endif 126 #ifdef BOOT_ELF32 127 Elf32_Ehdr elf32; 128 #endif 129 #ifdef BOOT_ELF64 130 Elf64_Ehdr elf64; 131 #endif 132 #ifdef BOOT_AOUT 133 struct exec aout; 134 #endif 135 } hdr; 136 ssize_t nr; 137 int rval; 138 139 /* Read the exec header. */ 140 if (lseek(fd, 0, SEEK_SET) == (off_t)-1) 141 goto err; 142 nr = read(fd, &hdr, sizeof(hdr)); 143 if (nr == -1) { 144 WARN(("read header failed")); 145 goto err; 146 } 147 if (nr != sizeof(hdr)) { 148 WARN(("read header short")); 149 errno = EFTYPE; 150 goto err; 151 } 152 153 #ifdef BOOT_ECOFF 154 if (!ECOFF_BADMAG(&hdr.coff)) { 155 rval = loadfile_coff(fd, &hdr.coff, marks, flags); 156 } else 157 #endif 158 #ifdef BOOT_ELF32 159 if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 && 160 hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) { 161 netbsd_elf_class = ELFCLASS32; 162 rval = loadfile_elf32(fd, &hdr.elf32, marks, flags); 163 } else 164 #endif 165 #ifdef BOOT_ELF64 166 if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 && 167 hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) { 168 netbsd_elf_class = ELFCLASS64; 169 rval = loadfile_elf64(fd, &hdr.elf64, marks, flags); 170 } else 171 #endif 172 #ifdef BOOT_AOUT 173 if (OKMAGIC(N_GETMAGIC(hdr.aout)) 174 #ifndef NO_MID_CHECK 175 && N_GETMID(hdr.aout) == MID_MACHINE 176 #endif 177 ) { 178 rval = loadfile_aout(fd, &hdr.aout, marks, flags); 179 } else 180 #endif 181 { 182 rval = 1; 183 errno = EFTYPE; 184 } 185 186 if (rval == 0) { 187 if ((flags & LOAD_ALL) != 0) 188 PROGRESS(("=0x%lx\n", 189 marks[MARK_END] - marks[MARK_START])); 190 return 0; 191 } 192 err: 193 return errno; 194 } 195