1 /* $NetBSD: bootxx.c,v 1.4 2003/08/07 16:28:38 agc 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * Ralph Campbell. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)boot.c 8.1 (Berkeley) 6/10/93 71 */ 72 73 #include <sys/param.h> 74 #include <sys/exec_elf.h> 75 #include <lib/libsa/stand.h> 76 #include <machine/prom.h> 77 78 typedef void (*entrypt) __P((int, char **, int, const void *)); 79 80 int main __P((int, char **)); 81 entrypt loadfile __P((char *path, char *name)); 82 83 /* 84 * This gets arguments from the PROM, calls other routines to open 85 * and load the secondary boot loader called boot, and then transfers 86 * execution to that program. 87 */ 88 int 89 main(argc, argv) 90 int argc; 91 char **argv; 92 { 93 entrypt entry; 94 char *cp; 95 extern void prom_init __P((void)); 96 97 prom_init(); 98 99 cp = *argv; 100 101 printf("\nNetBSD/mipsco " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n"); 102 103 entry = loadfile(cp, "/boot"); 104 if ((int)entry != -1) 105 goto goodload; 106 107 entry = loadfile(cp, "/boot.mipsco"); 108 if ((int)entry != -1) 109 goto goodload; 110 111 goto bad; 112 113 goodload: 114 MIPS_PROM(flushcache)(); 115 entry(argc, argv, 0, 0); 116 117 bad: 118 return (1); 119 } 120 121 /* 122 * Open 'filename', read in program and return the entry point or -1 if error. 123 */ 124 entrypt 125 loadfile(path, name) 126 char *path, *name; 127 { 128 int fd, i; 129 char *src, *dst, bootfname[64]; 130 Elf32_Ehdr ehdr; 131 Elf32_Phdr phdr; 132 133 dst = bootfname; 134 for (src = path; *src;/**/) 135 if ((*dst++ = *src++) == ')') 136 break; 137 for (src = name; *src;/**/) 138 *dst++ = *src++; 139 *dst = (char) 0; 140 141 if ((fd = open(bootfname, 0)) < 0) { 142 printf("open %s: %d\n", bootfname, errno); 143 goto err; 144 } 145 146 /* read the exec header */ 147 i = read(fd, (char *)&ehdr, sizeof(ehdr)); 148 if ((i != sizeof(ehdr)) || 149 (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 150 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 151 printf("%s: No ELF header\n", bootfname); 152 goto cerr; 153 } 154 155 for (i = 0; i < ehdr.e_phnum; i++) { 156 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0) 157 goto cerr; 158 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr)) 159 goto cerr; 160 if (phdr.p_type != PT_LOAD) 161 continue; 162 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0) 163 goto cerr; 164 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz) 165 goto cerr; 166 } 167 return ((entrypt)ehdr.e_entry); 168 169 cerr: 170 #ifndef LIBSA_NO_FS_CLOSE 171 (void) close(fd); 172 #endif 173 err: 174 printf("Can't load '%s'\n", bootfname); 175 return ((entrypt)-1); 176 } 177