bootxx.c revision 1.3
1 /* $NetBSD: bootxx.c,v 1.3 2001/07/08 04:25:37 wdk 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. 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/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 /* 88 * This gets arguments from the PROM, calls other routines to open 89 * and load the secondary boot loader called boot, and then transfers 90 * execution to that program. 91 */ 92 int 93 main(argc, argv) 94 int argc; 95 char **argv; 96 { 97 entrypt entry; 98 char *cp; 99 extern void prom_init __P((void)); 100 101 prom_init(); 102 103 cp = *argv; 104 105 printf("\nNetBSD/mipsco " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n"); 106 107 entry = loadfile(cp, "/boot"); 108 if ((int)entry != -1) 109 goto goodload; 110 111 entry = loadfile(cp, "/boot.mipsco"); 112 if ((int)entry != -1) 113 goto goodload; 114 115 goto bad; 116 117 goodload: 118 MIPS_PROM(flushcache)(); 119 entry(argc, argv, 0, 0); 120 121 bad: 122 return (1); 123 } 124 125 /* 126 * Open 'filename', read in program and return the entry point or -1 if error. 127 */ 128 entrypt 129 loadfile(path, name) 130 char *path, *name; 131 { 132 int fd, i; 133 char *src, *dst, bootfname[64]; 134 Elf32_Ehdr ehdr; 135 Elf32_Phdr phdr; 136 137 dst = bootfname; 138 for (src = path; *src;/**/) 139 if ((*dst++ = *src++) == ')') 140 break; 141 for (src = name; *src;/**/) 142 *dst++ = *src++; 143 *dst = (char) 0; 144 145 if ((fd = open(bootfname, 0)) < 0) { 146 printf("open %s: %d\n", bootfname, errno); 147 goto err; 148 } 149 150 /* read the exec header */ 151 i = read(fd, (char *)&ehdr, sizeof(ehdr)); 152 if ((i != sizeof(ehdr)) || 153 (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) || 154 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) { 155 printf("%s: No ELF header\n", bootfname); 156 goto cerr; 157 } 158 159 for (i = 0; i < ehdr.e_phnum; i++) { 160 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0) 161 goto cerr; 162 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr)) 163 goto cerr; 164 if (phdr.p_type != PT_LOAD) 165 continue; 166 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0) 167 goto cerr; 168 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz) 169 goto cerr; 170 } 171 return ((entrypt)ehdr.e_entry); 172 173 cerr: 174 #ifndef LIBSA_NO_FS_CLOSE 175 (void) close(fd); 176 #endif 177 err: 178 printf("Can't load '%s'\n", bootfname); 179 return ((entrypt)-1); 180 } 181
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