1 /* $NetBSD: bootxx.c,v 1.6 2008/04/28 20:23:29 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jonathan Stone, Michael Hitch, Simon Burge and Wayne Knowles. 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 (c) 1992, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Ralph Campbell. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * @(#)boot.c 8.1 (Berkeley) 6/10/93 64 */ 65 66 #include <sys/param.h> 67 #include <sys/exec_elf.h> 68 #include <lib/libsa/stand.h> 69 #include <machine/prom.h> 70 71 typedef void (*entrypt) __P((int, char **, int, const void *)); 72 73 int main __P((int, char **)); 74 entrypt loadfile __P((char *path, char *name)); 75 76 /* 77 * This gets arguments from the PROM, calls other routines to open 78 * and load the secondary boot loader called boot, and then transfers 79 * execution to that program. 80 */ 81 int 82 main(argc, argv) 83 int argc; 84 char **argv; 85 { 86 entrypt entry; 87 char *cp; 88 extern void prom_init __P((void)); 89 90 prom_init(); 91 92 cp = *argv; 93 94 printf("\nNetBSD/mipsco " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n"); 95 96 entry = loadfile(cp, "/boot"); 97 if ((int)entry != -1) 98 goto goodload; 99 100 entry = loadfile(cp, "/boot.mipsco"); 101 if ((int)entry != -1) 102 goto goodload; 103 104 goto bad; 105 106 goodload: 107 MIPS_PROM(flushcache)(); 108 entry(argc, argv, 0, 0); 109 110 bad: 111 return (1); 112 } 113 114 /* 115 * Open 'filename', read in program and return the entry point or -1 if error. 116 */ 117 entrypt 118 loadfile(path, name) 119 char *path, *name; 120 { 121 int fd, i; 122 char *src, *dst, bootfname[64]; 123 Elf32_Ehdr ehdr; 124 Elf32_Phdr phdr; 125 126 dst = bootfname; 127 for (src = path; *src;/**/) 128 if ((*dst++ = *src++) == ')') 129 break; 130 for (src = name; *src;/**/) 131 *dst++ = *src++; 132 *dst = (char) 0; 133 134 if ((fd = open(bootfname, 0)) < 0) { 135 printf("open %s: %d\n", bootfname, errno); 136 goto err; 137 } 138 139 /* read the exec header */ 140 i = read(fd, (char *)&ehdr, sizeof(ehdr)); 141 if ((i != sizeof(ehdr)) || 142 (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 143 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 144 printf("%s: No ELF header\n", bootfname); 145 goto cerr; 146 } 147 148 for (i = 0; i < ehdr.e_phnum; i++) { 149 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0) 150 goto cerr; 151 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr)) 152 goto cerr; 153 if (phdr.p_type != PT_LOAD) 154 continue; 155 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0) 156 goto cerr; 157 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz) 158 goto cerr; 159 } 160 return ((entrypt)ehdr.e_entry); 161 162 cerr: 163 #ifndef LIBSA_NO_FS_CLOSE 164 (void) close(fd); 165 #endif 166 err: 167 printf("Can't load '%s'\n", bootfname); 168 return ((entrypt)-1); 169 } 170