loadfile.c revision 1.22
1 /* $NetBSD: loadfile.c,v 1.22 2003/02/24 10:51:05 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 int fd, error; 108 109 /* Open the file. */ 110 if ((fd = open(fname, 0)) < 0) { 111 WARN(("open %s", fname ? fname : "<default>")); 112 return (-1); 113 } 114 115 /* Load it; save the value of errno across the close() call */ 116 if ((error = fdloadfile(fd, marks, flags)) != 0) { 117 (void)close(fd); 118 errno = error; 119 return (-1); 120 } 121 122 return (fd); 123 } 124 125 /* 126 * Read in program from the given file descriptor. 127 * Return error code (0 on success). 128 * Fill in marks. 129 */ 130 int 131 fdloadfile(fd, marks, flags) 132 int fd; 133 u_long *marks; 134 int flags; 135 { 136 union { 137 #ifdef BOOT_ECOFF 138 struct ecoff_exechdr coff; 139 #endif 140 #ifdef BOOT_ELF32 141 Elf32_Ehdr elf32; 142 #endif 143 #ifdef BOOT_ELF64 144 Elf64_Ehdr elf64; 145 #endif 146 #ifdef BOOT_AOUT 147 struct exec aout; 148 #endif 149 } hdr; 150 ssize_t nr; 151 int rval; 152 153 /* Read the exec header. */ 154 if (lseek(fd, 0, SEEK_SET) == (off_t)-1) 155 goto err; 156 if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) { 157 WARN(("read header")); 158 goto err; 159 } 160 161 #ifdef BOOT_ECOFF 162 if (!ECOFF_BADMAG(&hdr.coff)) { 163 rval = loadfile_coff(fd, &hdr.coff, marks, flags); 164 } else 165 #endif 166 #ifdef BOOT_ELF32 167 if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 && 168 hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) { 169 rval = loadfile_elf32(fd, &hdr.elf32, marks, flags); 170 } else 171 #endif 172 #ifdef BOOT_ELF64 173 if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 && 174 hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) { 175 rval = loadfile_elf64(fd, &hdr.elf64, marks, flags); 176 } else 177 #endif 178 #ifdef BOOT_AOUT 179 if (OKMAGIC(N_GETMAGIC(hdr.aout)) 180 #ifndef NO_MID_CHECK 181 && N_GETMID(hdr.aout) == MID_MACHINE 182 #endif 183 ) { 184 rval = loadfile_aout(fd, &hdr.aout, marks, flags); 185 } else 186 #endif 187 { 188 rval = 1; 189 errno = EFTYPE; 190 } 191 192 if (rval == 0) { 193 if ((flags & LOAD_ALL) != 0) 194 PROGRESS(("=0x%lx\n", 195 marks[MARK_END] - marks[MARK_START])); 196 return (0); 197 } 198 err: 199 return (errno); 200 } 201
Indexes created Mon Sep 22 13:09:51 GMT 2025