exec.c revision 1.15
1 /* $NetBSD: exec.c,v 1.15 2000/02/22 07:45:04 dbj Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1996 7 * Matthias Drochner. All rights reserved. 8 * Copyright (c) 1996 9 * Perry E. Metzger. All rights reserved. 10 * Copyright (c) 1997 11 * Martin Husemann. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)boot.c 8.1 (Berkeley) 6/10/93 42 */ 43 44 /* 45 * starts NetBSD a.out kernel 46 * needs lowlevel startup from startprog.S 47 * This is a special version of exec.c to support use of XMS. 48 */ 49 50 #include <sys/param.h> 51 #include <sys/reboot.h> 52 #ifdef COMPAT_OLDBOOT 53 #include <sys/disklabel.h> 54 #endif 55 56 #include <lib/libsa/stand.h> 57 58 #include "loadfile.h" 59 #include "libi386.h" 60 #include "bootinfo.h" 61 62 #ifdef COMPAT_OLDBOOT 63 static int dev2major __P((char *, int *)); 64 65 static int 66 dev2major(devname, major) 67 char *devname; 68 int *major; 69 { 70 static char *devices[] = {"wd", "", "fd", "", "sd"}; 71 #define NUMDEVICES (sizeof(devices)/sizeof(char *)) 72 int i; 73 74 for (i = 0; i < NUMDEVICES; i++) 75 if (!strcmp(devname, devices[i])) { 76 *major = i; 77 return (0); 78 } 79 return (-1); 80 } 81 #endif 82 #define BOOT_NARGS 6 83 84 extern struct btinfo_console btinfo_console; 85 86 int 87 exec_netbsd(file, loadaddr, boothowto) 88 const char *file; 89 physaddr_t loadaddr; 90 int boothowto; 91 { 92 u_long boot_argv[BOOT_NARGS]; 93 int fd; 94 u_long marks[MARK_MAX]; 95 struct btinfo_symtab btinfo_symtab; 96 u_long extmem; 97 u_long basemem; 98 #ifdef XMS 99 u_long xmsmem; 100 physaddr_t origaddr = loadaddr; 101 #endif 102 103 #ifdef COMPAT_OLDBOOT 104 char *fsname, *devname; 105 int unit, part; 106 const char *filename; 107 int bootdevnr; 108 #endif 109 110 #ifdef DEBUG 111 printf("exec: file=%s loadaddr=0x%lx\n", 112 file ? file : "NULL", loadaddr); 113 #endif 114 115 BI_ALLOC(6); /* ??? */ 116 117 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 118 119 extmem = getextmem(); 120 basemem = getbasemem(); 121 122 #ifdef XMS 123 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 124 u_long kernsize; 125 126 /* 127 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 128 * getextmem() is getextmem1(). Without, the "smart" 129 * methods could fail to report all memory as well. 130 * xmsmem is a few kB less than the actual size, but 131 * better than nothing. 132 */ 133 if (xmsmem > extmem) 134 extmem = xmsmem; 135 /* 136 * Get the size of the kernel 137 */ 138 marks[MARK_START] = loadaddr; 139 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 140 goto out; 141 close(fd); 142 143 kernsize = marks[MARK_END]; 144 kernsize = (kernsize + 1023) / 1024; 145 146 loadaddr = xmsalloc(kernsize); 147 if (!loadaddr) 148 return(ENOMEM); 149 } 150 #endif 151 marks[MARK_START] = loadaddr; 152 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 153 goto out; 154 155 boot_argv[0] = boothowto; 156 157 #ifdef COMPAT_OLDBOOT 158 /* prepare boot device information for kernel */ 159 if (parsebootfile(file, &fsname, &devname, &unit, &part, &filename) 160 || strcmp(fsname, "ufs")) 161 bootdevnr = 0; /* XXX error out if parse error??? */ 162 else { 163 int major; 164 165 if (strcmp(devname, "hd") == 0) { 166 /* generic BIOS disk, have to guess type */ 167 struct open_file *f = &files[fd]; /* XXX */ 168 169 if (biosdisk_gettype(f) == DTYPE_SCSI) 170 devname = "sd"; 171 else 172 devname = "wd"; 173 174 /* 175 * The old boot block performed the following 176 * conversion: 177 * 178 * hdN -> Xd0 179 * 180 * where X is the type specified by the label. 181 * We mimmick that here, for lack of any better 182 * way of doing things. 183 */ 184 unit = 0; 185 } 186 187 if (dev2major(devname, &major)) 188 bootdevnr = 0; /* XXX error out??? */ 189 else 190 bootdevnr = MAKEBOOTDEV(major, 0, 0, unit, part); 191 } 192 193 boot_argv[1] = bootdevnr; 194 #else 195 boot_argv[1] = 0; 196 #endif 197 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 198 /* argv[3] below */ 199 boot_argv[4] = extmem; 200 boot_argv[5] = basemem; 201 202 close(fd); 203 204 /* 205 * Gather some information for the kernel. Do this after the 206 * "point of no return" to avoid memory leaks. 207 * (but before DOS might be trashed in the XMS case) 208 */ 209 #ifdef PASS_BIOSGEOM 210 bi_getbiosgeom(); 211 #endif 212 #ifdef PASS_MEMMAP 213 bi_getmemmap(); 214 #endif 215 216 #ifdef XMS 217 if (loadaddr != origaddr) { 218 /* 219 * We now have done our last DOS IO, so we may 220 * trash the OS. Copy the data from the temporary 221 * buffer to its real adress. 222 */ 223 marks[MARK_START] -= loadaddr; 224 marks[MARK_END] -= loadaddr; 225 marks[MARK_SYM] -= loadaddr; 226 marks[MARK_END] -= loadaddr; 227 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 228 } 229 #endif 230 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 231 (-sizeof(int)); 232 233 boot_argv[3] = marks[MARK_END]; 234 235 236 #ifdef DEBUG 237 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 238 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 239 #endif 240 241 btinfo_symtab.nsym = marks[MARK_NSYM]; 242 btinfo_symtab.ssym = marks[MARK_SYM]; 243 btinfo_symtab.esym = marks[MARK_END]; 244 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 245 246 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 247 i386_trunc_page(basemem*1024)); 248 panic("exec returned"); 249 250 out: 251 BI_FREE(); 252 bootinfo = 0; 253 return (-1); 254 } 255
Indexes created Tue Sep 23 07:09:52 GMT 2025