1 /* $NetBSD: loadfile.c,v 1.33 2021/05/21 21:52:15 jmcneill 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 u_int netbsd_elf_data; 88 89 /* 90 * Open 'filename', read in program and return the opened file 91 * descriptor if ok, or -1 on error. 92 * Fill in marks 93 */ 94 int 95 loadfile(const char *fname, u_long *marks, int flags) 96 { 97 int fd, error; 98 99 /* Open the file. */ 100 if ((fd = open(fname, 0)) < 0) { 101 WARN(("open %s", fname ? fname : "<default>")); 102 return -1; 103 } 104 105 /* Load it; save the value of errno across the close() call */ 106 if ((error = fdloadfile(fd, marks, flags)) != 0) { 107 (void)close(fd); 108 errno = error; 109 return -1; 110 } 111 112 return fd; 113 } 114 115 /* 116 * Read in program from the given file descriptor. 117 * Return error code (0 on success). 118 * Fill in marks. 119 */ 120 int 121 fdloadfile(int fd, u_long *marks, int flags) 122 { 123 union { 124 #ifdef BOOT_ECOFF 125 struct ecoff_exechdr coff; 126 #endif 127 #ifdef BOOT_ELF32 128 Elf32_Ehdr elf32; 129 #endif 130 #ifdef BOOT_ELF64 131 Elf64_Ehdr elf64; 132 #endif 133 #ifdef BOOT_AOUT 134 struct exec aout; 135 #endif 136 } hdr; 137 ssize_t nr; 138 int rval; 139 140 /* Read the exec header. */ 141 if (lseek(fd, 0, SEEK_SET) == (off_t)-1) 142 goto err; 143 nr = read(fd, &hdr, sizeof(hdr)); 144 if (nr == -1) { 145 WARN(("read header failed")); 146 goto err; 147 } 148 if (nr != sizeof(hdr)) { 149 WARN(("read header short")); 150 errno = EFTYPE; 151 goto err; 152 } 153 154 #ifdef BOOT_ECOFF 155 if (!ECOFF_BADMAG(&hdr.coff)) { 156 rval = loadfile_coff(fd, &hdr.coff, marks, flags); 157 } else 158 #endif 159 #ifdef BOOT_ELF32 160 if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 && 161 hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) { 162 netbsd_elf_class = ELFCLASS32; 163 netbsd_elf_data = hdr.elf32.e_ident[EI_DATA]; 164 rval = loadfile_elf32(fd, &hdr.elf32, marks, flags); 165 } else 166 #endif 167 #ifdef BOOT_ELF64 168 if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 && 169 hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) { 170 netbsd_elf_class = ELFCLASS64; 171 netbsd_elf_data = hdr.elf64.e_ident[EI_DATA]; 172 rval = loadfile_elf64(fd, &hdr.elf64, marks, flags); 173 } else 174 #endif 175 #ifdef BOOT_AOUT 176 if (OKMAGIC(N_GETMAGIC(hdr.aout)) 177 #ifndef NO_MID_CHECK 178 && N_GETMID(hdr.aout) == MID_MACHINE 179 #endif 180 ) { 181 rval = loadfile_aout(fd, &hdr.aout, marks, flags); 182 } else 183 #endif 184 { 185 rval = 1; 186 errno = EFTYPE; 187 } 188 189 if (rval == 0) { 190 if ((flags & LOAD_ALL) != 0) 191 PROGRESS(("=0x%lx\n", 192 marks[MARK_END] - marks[MARK_START])); 193 return 0; 194 } 195 err: 196 return errno; 197 } 198
Indexes created Sun Sep 21 20:09:37 GMT 2025