bootxx.c revision 1.23
1 /* $NetBSD: bootxx.c,v 1.23 1999/11/27 06:34:06 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 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 and Simon Burge. 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. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * @(#)boot.c 8.1 (Berkeley) 6/10/93 75 */ 76 77 #include <sys/param.h> 78 #include <sys/exec_elf.h> 79 #include <lib/libsa/stand.h> 80 #include <machine/dec_prom.h> 81 82 typedef void (*entrypt) __P((int, char **, int, const void *)); 83 84 int main __P((int, char **)); 85 entrypt loadfile __P((char *path, char *name)); 86 87 extern int clear_cache __P((char *addr, int len)); 88 extern int bcmp __P((const void *, const void *, size_t)); /* XXX */ 89 90 /* 91 * This gets arguments from the PROM, calls other routines to open 92 * and load the secondary boot loader called boot, and then transfers 93 * execution to that program. 94 * 95 * Argv[0] should be something like "rz(0,0,0)netbsd" on a DECstation 3100. 96 * Argv[0,1] should be something like "boot 5/rz0/netbsd" on a DECstation 5000. 97 * The argument "-a" means netbsd should do an automatic reboot. 98 */ 99 int 100 main(argc, argv) 101 int argc; 102 char **argv; 103 { 104 char *cp; 105 entrypt entry; 106 107 /* check for DS5000 boot */ 108 if (strcmp(argv[0], "boot") == 0) { 109 argc--; 110 argv++; 111 } 112 cp = *argv; 113 114 printf("\nNetBSD/pmax " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n"); 115 116 entry = loadfile(cp, "/boot.pmax"); 117 if ((int)entry != -1) 118 goto goodload; 119 120 /* Give old /boot a go... */ 121 entry = loadfile(cp, "/boot"); 122 if ((int)entry != -1) 123 goto goodload; 124 125 /* Booting off an 8.3 filesystem? */ 126 entry = loadfile(cp, "/boot.pma"); 127 if ((int)entry != -1) 128 goto goodload; 129 130 goto bad; 131 goodload: 132 133 clear_cache((char *)PRIMARY_LOAD_ADDRESS, 1024 * 1024); 134 if (callv == &callvec) 135 entry(argc, argv, 0, 0); 136 else 137 entry(argc, argv, DEC_PROM_MAGIC, callv); 138 bad: 139 /* XXX would calling prom_halt here be cleaner? */ 140 return (1); 141 } 142 143 /* 144 * Open 'filename', read in program and return the entry point or -1 if error. 145 */ 146 entrypt 147 loadfile(path, name) 148 char *path, *name; 149 { 150 int fd, i; 151 char c, *buf, bootfname[64]; 152 Elf32_Ehdr ehdr; 153 Elf32_Phdr phdr; 154 155 strcpy(bootfname, path); 156 buf = bootfname; 157 while ((c = *buf++) != '\0') { 158 if (c == ')') 159 break; 160 if (c != '/') 161 continue; 162 while ((c = *buf++) != '\0') 163 if (c == '/') 164 break; 165 /* 166 * Make "N/rzY" with no trailing '/' valid by adding 167 * the extra '/' before appending 'bootpmax' to the path. 168 */ 169 if (c != '/') { 170 buf--; 171 *buf++ = '/'; 172 *buf = '\0'; 173 } 174 break; 175 } 176 strcpy(buf, name); 177 if ((fd = open(bootfname, 0)) < 0) { 178 printf("open %s: %d\n", bootfname, errno); 179 goto err; 180 } 181 182 /* read the exec header */ 183 i = read(fd, (char *)&ehdr, sizeof(ehdr)); 184 if ((i != sizeof(ehdr)) || 185 (bcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 186 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 187 printf("%s: No ELF header\n", bootfname); 188 goto cerr; 189 } 190 191 for (i = 0; i < ehdr.e_phnum; i++) { 192 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0) 193 goto cerr; 194 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr)) 195 goto cerr; 196 if (phdr.p_type != PT_LOAD) 197 continue; 198 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0) 199 goto cerr; 200 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz) 201 goto cerr; 202 } 203 return ((entrypt)ehdr.e_entry); 204 205 cerr: 206 #ifndef LIBSA_NO_FS_CLOSE 207 (void) close(fd); 208 #endif 209 err: 210 printf("Can't load '%s'\n", bootfname); 211 return ((entrypt)-1); 212 } 213
Indexes created Tue Sep 23 14:10:03 GMT 2025