exec.c revision 1.26
1 /* $NetBSD: exec.c,v 1.26 2008/05/20 14:46:54 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 1982, 1986, 1990, 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. Neither the name of the University nor the names of its contributors 42 * may be used to endorse or promote products derived from this software 43 * without specific prior written permission. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 * 57 * @(#)boot.c 8.1 (Berkeley) 6/10/93 58 */ 59 60 /* 61 * Copyright (c) 1996 62 * Matthias Drochner. All rights reserved. 63 * Copyright (c) 1996 64 * Perry E. Metzger. All rights reserved. 65 * 66 * Redistribution and use in source and binary forms, with or without 67 * modification, are permitted provided that the following conditions 68 * are met: 69 * 1. Redistributions of source code must retain the above copyright 70 * notice, this list of conditions and the following disclaimer. 71 * 2. Redistributions in binary form must reproduce the above copyright 72 * notice, this list of conditions and the following disclaimer in the 73 * documentation and/or other materials provided with the distribution. 74 * 3. All advertising materials mentioning features or use of this software 75 * must display the following acknowledgement: 76 * This product includes software developed by the University of 77 * California, Berkeley and its contributors. 78 * 4. Neither the name of the University nor the names of its contributors 79 * may be used to endorse or promote products derived from this software 80 * without specific prior written permission. 81 * 82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 92 * SUCH DAMAGE. 93 * 94 * @(#)boot.c 8.1 (Berkeley) 6/10/93 95 */ 96 97 /* 98 * starts NetBSD a.out kernel 99 * needs lowlevel startup from startprog.S 100 * This is a special version of exec.c to support use of XMS. 101 */ 102 103 #include <sys/param.h> 104 #include <sys/reboot.h> 105 106 #include <lib/libsa/stand.h> 107 #include <lib/libkern/libkern.h> 108 109 #include "loadfile.h" 110 #include "libi386.h" 111 #include "bootinfo.h" 112 #include "bootmod.h" 113 #ifdef SUPPORT_PS2 114 #include "biosmca.h" 115 #endif 116 117 #define BOOT_NARGS 6 118 119 #ifndef PAGE_SIZE 120 #define PAGE_SIZE 4096 121 #endif 122 123 extern struct btinfo_console btinfo_console; 124 125 boot_module_t *boot_modules; 126 bool boot_modules_enabled = true; 127 bool kernel_loaded; 128 129 static struct btinfo_modulelist *btinfo_modulelist; 130 static size_t btinfo_modulelist_size; 131 static uint32_t image_end; 132 static char module_base[64] = "/"; 133 134 static void module_init(void); 135 136 int 137 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto) 138 { 139 u_long boot_argv[BOOT_NARGS]; 140 int fd; 141 u_long marks[MARK_MAX]; 142 struct btinfo_symtab btinfo_symtab; 143 u_long extmem; 144 u_long basemem; 145 #ifdef XMS 146 u_long xmsmem; 147 physaddr_t origaddr = loadaddr; 148 #endif 149 150 #ifdef DEBUG 151 printf("exec: file=%s loadaddr=0x%lx\n", 152 file ? file : "NULL", loadaddr); 153 #endif 154 155 BI_ALLOC(32); /* ??? */ 156 157 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 158 159 extmem = getextmem(); 160 basemem = getbasemem(); 161 162 #ifdef XMS 163 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 164 u_long kernsize; 165 166 /* 167 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 168 * getextmem() is getextmem1(). Without, the "smart" 169 * methods could fail to report all memory as well. 170 * xmsmem is a few kB less than the actual size, but 171 * better than nothing. 172 */ 173 if (xmsmem > extmem) 174 extmem = xmsmem; 175 /* 176 * Get the size of the kernel 177 */ 178 marks[MARK_START] = loadaddr; 179 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 180 goto out; 181 close(fd); 182 183 kernsize = marks[MARK_END]; 184 kernsize = (kernsize + 1023) / 1024; 185 186 loadaddr = xmsalloc(kernsize); 187 if (!loadaddr) 188 return ENOMEM; 189 } 190 #endif 191 marks[MARK_START] = loadaddr; 192 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 193 goto out; 194 195 boot_argv[0] = boothowto; 196 boot_argv[1] = 0; 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 address. 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 boot_argv[3] = marks[MARK_END]; 233 image_end = marks[MARK_END]; 234 kernel_loaded = true; 235 236 /* pull in any modules if necessary */ 237 if (boot_modules_enabled) { 238 if (netbsd_version / 1000000 % 100 == 99) { 239 /* -current */ 240 snprintf(module_base, sizeof(module_base), 241 "/stand/modules/%d.%d.%d", 242 netbsd_version / 100000000, 243 netbsd_version / 1000000 % 100, 244 netbsd_version / 100 % 100); 245 } else if (netbsd_version != 0) { 246 /* release */ 247 snprintf(module_base, sizeof(module_base), 248 "/stand/modules/%d.%d", 249 netbsd_version / 100000000, 250 netbsd_version / 1000000 % 100); 251 } 252 module_init(); 253 if (btinfo_modulelist) { 254 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 255 btinfo_modulelist_size); 256 } 257 } 258 259 #ifdef DEBUG 260 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 261 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 262 #endif 263 264 btinfo_symtab.nsym = marks[MARK_NSYM]; 265 btinfo_symtab.ssym = marks[MARK_SYM]; 266 btinfo_symtab.esym = marks[MARK_END]; 267 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 268 269 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 270 x86_trunc_page(basemem*1024)); 271 panic("exec returned"); 272 273 out: 274 BI_FREE(); 275 bootinfo = 0; 276 return -1; 277 } 278 279 static const char * 280 module_path(boot_module_t *bm) 281 { 282 static char buf[256]; 283 const char *name; 284 285 name = bm->bm_path; 286 if (name[0] == '/') 287 return name; 288 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", module_base, bm->bm_path, 289 bm->bm_path); 290 return buf; 291 } 292 293 static void 294 module_init(void) 295 { 296 struct bi_modulelist_entry *bi; 297 struct stat st; 298 const char *path; 299 char *buf; 300 boot_module_t *bm; 301 size_t len; 302 off_t off; 303 int err, fd; 304 305 /* First, see which modules are valid and calculate btinfo size */ 306 len = sizeof(struct btinfo_modulelist); 307 for (bm = boot_modules; bm; bm = bm->bm_next) { 308 path = module_path(bm); 309 fd = open(path, 0); 310 if (fd == -1) { 311 printf("WARNING: couldn't open %s\n", path); 312 bm->bm_len = -1; 313 continue; 314 } 315 err = fstat(fd, &st); 316 if (err == -1 || st.st_size == -1) { 317 printf("WARNING: couldn't stat %s\n", path); 318 close(fd); 319 bm->bm_len = -1; 320 continue; 321 } 322 bm->bm_len = st.st_size; 323 close(fd); 324 len += sizeof(struct bi_modulelist_entry); 325 } 326 327 /* Allocate the module list */ 328 btinfo_modulelist = alloc(len); 329 if (btinfo_modulelist == NULL) { 330 printf("WARNING: couldn't allocate module list\n"); 331 return; 332 } 333 memset(btinfo_modulelist, 0, len); 334 btinfo_modulelist_size = len; 335 336 /* Fill in btinfo structure */ 337 buf = (char *)btinfo_modulelist; 338 btinfo_modulelist->num = 0; 339 off = sizeof(struct btinfo_modulelist); 340 341 for (bm = boot_modules; bm; bm = bm->bm_next) { 342 if (bm->bm_len == -1) 343 continue; 344 path = module_path(bm); 345 printf("Loading %s ", path); 346 fd = open(path, 0); 347 if (fd == -1) { 348 printf("ERROR: couldn't open %s\n", path); 349 continue; 350 } 351 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 352 len = pread(fd, (void *)image_end, SSIZE_MAX); 353 if (len < bm->bm_len) { 354 printf(" FAILED\n"); 355 } else { 356 btinfo_modulelist->num++; 357 bi = (struct bi_modulelist_entry *)(buf + off); 358 off += sizeof(struct bi_modulelist_entry); 359 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 360 bi->base = image_end; 361 bi->len = len; 362 bi->type = BI_MODULE_ELF; 363 printf(" \n"); 364 } 365 if (len > 0) 366 image_end += len; 367 close(fd); 368 } 369 btinfo_modulelist->endpa = image_end; 370 } 371
Indexes created Thu Sep 25 02:09:54 GMT 2025