bootxx.c revision 1.24
1 /* $NetBSD: bootxx.c,v 1.24 2001/07/07 14:21:01 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 89 /* 90 * This gets arguments from the PROM, calls other routines to open 91 * and load the secondary boot loader called boot, and then transfers 92 * execution to that program. 93 * 94 * Argv[0] should be something like "rz(0,0,0)netbsd" on a DECstation 3100. 95 * Argv[0,1] should be something like "boot 5/rz0/netbsd" on a DECstation 5000. 96 * The argument "-a" means netbsd should do an automatic reboot. 97 */ 98 int 99 main(argc, argv) 100 int argc; 101 char **argv; 102 { 103 char *cp; 104 entrypt entry; 105 106 /* check for DS5000 boot */ 107 if (strcmp(argv[0], "boot") == 0) { 108 argc--; 109 argv++; 110 } 111 cp = *argv; 112 113 printf("\nNetBSD/pmax " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n"); 114 115 entry = loadfile(cp, "/boot.pmax"); 116 if ((int)entry != -1) 117 goto goodload; 118 119 /* Give old /boot a go... */ 120 entry = loadfile(cp, "/boot"); 121 if ((int)entry != -1) 122 goto goodload; 123 124 /* Booting off an 8.3 filesystem? */ 125 entry = loadfile(cp, "/boot.pma"); 126 if ((int)entry != -1) 127 goto goodload; 128 129 goto bad; 130 goodload: 131 132 clear_cache((char *)PRIMARY_LOAD_ADDRESS, 1024 * 1024); 133 if (callv == &callvec) 134 entry(argc, argv, 0, 0); 135 else 136 entry(argc, argv, DEC_PROM_MAGIC, callv); 137 bad: 138 /* XXX would calling prom_halt here be cleaner? */ 139 return (1); 140 } 141 142 /* 143 * Open 'filename', read in program and return the entry point or -1 if error. 144 */ 145 entrypt 146 loadfile(path, name) 147 char *path, *name; 148 { 149 int fd, i; 150 char c, *buf, bootfname[64]; 151 Elf32_Ehdr ehdr; 152 Elf32_Phdr phdr; 153 154 strcpy(bootfname, path); 155 buf = bootfname; 156 while ((c = *buf++) != '\0') { 157 if (c == ')') 158 break; 159 if (c != '/') 160 continue; 161 while ((c = *buf++) != '\0') 162 if (c == '/') 163 break; 164 /* 165 * Make "N/rzY" with no trailing '/' valid by adding 166 * the extra '/' before appending 'bootpmax' to the path. 167 */ 168 if (c != '/') { 169 buf--; 170 *buf++ = '/'; 171 *buf = '\0'; 172 } 173 break; 174 } 175 strcpy(buf, name); 176 if ((fd = open(bootfname, 0)) < 0) { 177 printf("open %s: %d\n", bootfname, errno); 178 goto err; 179 } 180 181 /* read the exec header */ 182 i = read(fd, (char *)&ehdr, sizeof(ehdr)); 183 if ((i != sizeof(ehdr)) || 184 (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 185 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 186 printf("%s: No ELF header\n", bootfname); 187 goto cerr; 188 } 189 190 for (i = 0; i < ehdr.e_phnum; i++) { 191 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0) 192 goto cerr; 193 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr)) 194 goto cerr; 195 if (phdr.p_type != PT_LOAD) 196 continue; 197 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0) 198 goto cerr; 199 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz) 200 goto cerr; 201 } 202 return ((entrypt)ehdr.e_entry); 203 204 cerr: 205 #ifndef LIBSA_NO_FS_CLOSE 206 (void) close(fd); 207 #endif 208 err: 209 printf("Can't load '%s'\n", bootfname); 210 return ((entrypt)-1); 211 } 212
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