exec.c revision 1.16
1 /* $NetBSD: exec.c,v 1.16 2001/05/19 18:15:14 jdolecek 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 #ifdef SUPPORT_PS2 62 #include "biosmca.h" 63 #endif 64 65 #ifdef COMPAT_OLDBOOT 66 static int dev2major __P((char *, int *)); 67 68 static int 69 dev2major(devname, major) 70 char *devname; 71 int *major; 72 { 73 static const struct { 74 const char *name; 75 int maj; 76 } devices[] = { 77 { "wd", 0 }, 78 { "fd", 2 }, 79 { "sd", 4 }, 80 #ifdef SUPPORT_PS2 81 { "ed", 20 }, 82 #endif 83 }; 84 #define NUMDEVICES (sizeof(devices)/sizeof(devices[0])) 85 int i; 86 87 for (i = 0; i < NUMDEVICES; i++) 88 if (!strcmp(devname, devices[i].name)) { 89 *major = devices[i].maj; 90 return (0); 91 } 92 return (-1); 93 } 94 #endif 95 #define BOOT_NARGS 6 96 97 extern struct btinfo_console btinfo_console; 98 99 int 100 exec_netbsd(file, loadaddr, boothowto) 101 const char *file; 102 physaddr_t loadaddr; 103 int boothowto; 104 { 105 u_long boot_argv[BOOT_NARGS]; 106 int fd; 107 u_long marks[MARK_MAX]; 108 struct btinfo_symtab btinfo_symtab; 109 u_long extmem; 110 u_long basemem; 111 #ifdef XMS 112 u_long xmsmem; 113 physaddr_t origaddr = loadaddr; 114 #endif 115 116 #ifdef COMPAT_OLDBOOT 117 char *fsname, *devname; 118 int unit, part; 119 const char *filename; 120 int bootdevnr; 121 #endif 122 123 #ifdef DEBUG 124 printf("exec: file=%s loadaddr=0x%lx\n", 125 file ? file : "NULL", loadaddr); 126 #endif 127 128 BI_ALLOC(6); /* ??? */ 129 130 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 131 132 extmem = getextmem(); 133 basemem = getbasemem(); 134 135 #ifdef XMS 136 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 137 u_long kernsize; 138 139 /* 140 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 141 * getextmem() is getextmem1(). Without, the "smart" 142 * methods could fail to report all memory as well. 143 * xmsmem is a few kB less than the actual size, but 144 * better than nothing. 145 */ 146 if (xmsmem > extmem) 147 extmem = xmsmem; 148 /* 149 * Get the size of the kernel 150 */ 151 marks[MARK_START] = loadaddr; 152 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 153 goto out; 154 close(fd); 155 156 kernsize = marks[MARK_END]; 157 kernsize = (kernsize + 1023) / 1024; 158 159 loadaddr = xmsalloc(kernsize); 160 if (!loadaddr) 161 return(ENOMEM); 162 } 163 #endif 164 marks[MARK_START] = loadaddr; 165 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 166 goto out; 167 168 boot_argv[0] = boothowto; 169 170 #ifdef COMPAT_OLDBOOT 171 /* prepare boot device information for kernel */ 172 if (parsebootfile(file, &fsname, &devname, &unit, &part, &filename) 173 || strcmp(fsname, "ufs")) 174 bootdevnr = 0; /* XXX error out if parse error??? */ 175 else { 176 int major; 177 178 if (strcmp(devname, "hd") == 0) { 179 /* generic BIOS disk, have to guess type */ 180 struct open_file *f = &files[fd]; /* XXX */ 181 182 switch (biosdisk_gettype(f)) { 183 case DTYPE_SCSI: 184 devname = "sd"; 185 break; 186 #ifdef SUPPORT_PS2 187 case DTYPE_ESDI: 188 if (biosmca_ps2model) { 189 devname = "ed"; 190 break; 191 } 192 #endif 193 default: 194 devname = "wd"; 195 break; 196 } 197 198 /* 199 * The old boot block performed the following 200 * conversion: 201 * 202 * hdN -> Xd0 203 * 204 * where X is the type specified by the label. 205 * We mimmick that here, for lack of any better 206 * way of doing things. 207 */ 208 unit = 0; 209 } 210 211 if (dev2major(devname, &major)) 212 bootdevnr = 0; /* XXX error out??? */ 213 else 214 bootdevnr = MAKEBOOTDEV(major, 0, 0, unit, part); 215 } 216 217 boot_argv[1] = bootdevnr; 218 #else 219 boot_argv[1] = 0; 220 #endif 221 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 222 /* argv[3] below */ 223 boot_argv[4] = extmem; 224 boot_argv[5] = basemem; 225 226 close(fd); 227 228 /* 229 * Gather some information for the kernel. Do this after the 230 * "point of no return" to avoid memory leaks. 231 * (but before DOS might be trashed in the XMS case) 232 */ 233 #ifdef PASS_BIOSGEOM 234 bi_getbiosgeom(); 235 #endif 236 #ifdef PASS_MEMMAP 237 bi_getmemmap(); 238 #endif 239 240 #ifdef XMS 241 if (loadaddr != origaddr) { 242 /* 243 * We now have done our last DOS IO, so we may 244 * trash the OS. Copy the data from the temporary 245 * buffer to its real adress. 246 */ 247 marks[MARK_START] -= loadaddr; 248 marks[MARK_END] -= loadaddr; 249 marks[MARK_SYM] -= loadaddr; 250 marks[MARK_END] -= loadaddr; 251 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 252 } 253 #endif 254 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 255 (-sizeof(int)); 256 257 boot_argv[3] = marks[MARK_END]; 258 259 260 #ifdef DEBUG 261 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 262 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 263 #endif 264 265 btinfo_symtab.nsym = marks[MARK_NSYM]; 266 btinfo_symtab.ssym = marks[MARK_SYM]; 267 btinfo_symtab.esym = marks[MARK_END]; 268 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 269 270 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 271 i386_trunc_page(basemem*1024)); 272 panic("exec returned"); 273 274 out: 275 BI_FREE(); 276 bootinfo = 0; 277 return (-1); 278 } 279
Indexes created Mon Sep 22 10:09:38 GMT 2025