exec.c revision 1.22.74.3
1 /* $NetBSD: exec.c,v 1.22.74.3 2009/01/17 13:28:05 mjf 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 <machine/multiboot.h> 107 108 #include <lib/libsa/stand.h> 109 #include <lib/libkern/libkern.h> 110 111 #include "loadfile.h" 112 #include "libi386.h" 113 #include "bootinfo.h" 114 #include "bootmod.h" 115 #ifdef SUPPORT_PS2 116 #include "biosmca.h" 117 #endif 118 119 #define BOOT_NARGS 6 120 121 #ifndef PAGE_SIZE 122 #define PAGE_SIZE 4096 123 #endif 124 125 extern struct btinfo_console btinfo_console; 126 127 boot_module_t *boot_modules; 128 bool boot_modules_enabled = true; 129 bool kernel_loaded; 130 131 static struct btinfo_modulelist *btinfo_modulelist; 132 static size_t btinfo_modulelist_size; 133 static uint32_t image_end; 134 static char module_base[64] = "/"; 135 136 static void module_init(void); 137 138 void 139 module_add(char *name) 140 { 141 boot_module_t *bm, *bmp; 142 size_t len; 143 char *str; 144 145 while (*name == ' ' || *name == '\t') 146 ++name; 147 148 bm = alloc(sizeof(boot_module_t)); 149 len = strlen(name) + 1; 150 str = alloc(len); 151 if (bm == NULL || str == NULL) { 152 printf("couldn't allocate module\n"); 153 return; 154 } 155 memcpy(str, name, len); 156 bm->bm_path = str; 157 bm->bm_next = NULL; 158 if (boot_modules == NULL) 159 boot_modules = bm; 160 else { 161 for (bmp = boot_modules; bmp->bm_next; 162 bmp = bmp->bm_next) 163 ; 164 bmp->bm_next = bm; 165 } 166 } 167 168 static int 169 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 170 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 171 { 172 int fd; 173 #ifdef XMS 174 u_long xmsmem; 175 physaddr_t origaddr = loadaddr; 176 #endif 177 178 *extmem = getextmem(); 179 *basemem = getbasemem(); 180 181 #ifdef XMS 182 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 183 u_long kernsize; 184 185 /* 186 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 187 * getextmem() is getextmem1(). Without, the "smart" 188 * methods could fail to report all memory as well. 189 * xmsmem is a few kB less than the actual size, but 190 * better than nothing. 191 */ 192 if (xmsmem > *extmem) 193 *extmem = xmsmem; 194 /* 195 * Get the size of the kernel 196 */ 197 marks[MARK_START] = loadaddr; 198 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 199 return EIO; 200 close(fd); 201 202 kernsize = marks[MARK_END]; 203 kernsize = (kernsize + 1023) / 1024; 204 205 loadaddr = xmsalloc(kernsize); 206 if (!loadaddr) 207 return ENOMEM; 208 } 209 #endif 210 marks[MARK_START] = loadaddr; 211 if ((fd = loadfile(file, marks, 212 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 213 return EIO; 214 215 close(fd); 216 217 /* Now we know the root fs type, load modules for it. */ 218 module_add(fsmod); 219 if (fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0) 220 module_add(fsmod2); 221 222 /* 223 * Gather some information for the kernel. Do this after the 224 * "point of no return" to avoid memory leaks. 225 * (but before DOS might be trashed in the XMS case) 226 */ 227 #ifdef PASS_BIOSGEOM 228 bi_getbiosgeom(); 229 #endif 230 #ifdef PASS_MEMMAP 231 bi_getmemmap(); 232 #endif 233 234 #ifdef XMS 235 if (loadaddr != origaddr) { 236 /* 237 * We now have done our last DOS IO, so we may 238 * trash the OS. Copy the data from the temporary 239 * buffer to its real address. 240 */ 241 marks[MARK_START] -= loadaddr; 242 marks[MARK_END] -= loadaddr; 243 marks[MARK_SYM] -= loadaddr; 244 marks[MARK_END] -= loadaddr; 245 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 246 } 247 #endif 248 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 249 (-sizeof(int)); 250 image_end = marks[MARK_END]; 251 kernel_loaded = true; 252 253 return 0; 254 } 255 256 int 257 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy) 258 { 259 u_long boot_argv[BOOT_NARGS]; 260 u_long marks[MARK_MAX]; 261 struct btinfo_symtab btinfo_symtab; 262 u_long extmem; 263 u_long basemem; 264 265 #ifdef DEBUG 266 printf("exec: file=%s loadaddr=0x%lx\n", 267 file ? file : "NULL", loadaddr); 268 #endif 269 270 BI_ALLOC(32); /* ??? */ 271 272 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 273 274 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 275 goto out; 276 277 boot_argv[0] = boothowto; 278 boot_argv[1] = 0; 279 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 280 boot_argv[3] = marks[MARK_END]; 281 boot_argv[4] = extmem; 282 boot_argv[5] = basemem; 283 284 /* pull in any modules if necessary */ 285 if (boot_modules_enabled) { 286 module_init(); 287 if (btinfo_modulelist) { 288 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 289 btinfo_modulelist_size); 290 } 291 } 292 293 #ifdef DEBUG 294 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 295 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 296 #endif 297 298 btinfo_symtab.nsym = marks[MARK_NSYM]; 299 btinfo_symtab.ssym = marks[MARK_SYM]; 300 btinfo_symtab.esym = marks[MARK_END]; 301 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 302 303 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 304 x86_trunc_page(basemem*1024)); 305 panic("exec returned"); 306 307 out: 308 BI_FREE(); 309 bootinfo = 0; 310 return -1; 311 } 312 313 static const char * 314 module_path(boot_module_t *bm) 315 { 316 static char buf[256]; 317 char name_buf[256]; 318 const char *name, *name2; 319 320 name = bm->bm_path; 321 for (name2 = name; *name2; ++name2) { 322 if (*name2 == ' ' || *name2 == '\t') { 323 strlcpy(name_buf, name, sizeof(name_buf)); 324 if (name2 - name < sizeof(name_buf)) 325 name_buf[name2 - name] = '\0'; 326 name = name_buf; 327 break; 328 } 329 } 330 if (name[0] == '/') 331 snprintf(buf, sizeof(buf), "%s", name); 332 else 333 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", 334 module_base, name, name); 335 336 return buf; 337 } 338 339 static int 340 module_open(boot_module_t *bm, int mode) 341 { 342 int fd; 343 const char *path; 344 345 /* check the expanded path first */ 346 path = module_path(bm); 347 fd = open(path, mode); 348 if (fd == -1) { 349 printf("WARNING: couldn't open %s\n", path); 350 /* now attempt the raw path provided */ 351 fd = open(bm->bm_path, mode); 352 if (fd == -1) 353 printf("WARNING: couldn't open %s\n", bm->bm_path); 354 } 355 return fd; 356 } 357 358 static void 359 module_init(void) 360 { 361 struct bi_modulelist_entry *bi; 362 struct stat st; 363 const char *machine; 364 char *buf; 365 boot_module_t *bm; 366 size_t len; 367 off_t off; 368 int err, fd; 369 370 switch (netbsd_elf_class) { 371 case ELFCLASS32: 372 machine = "i386"; 373 break; 374 case ELFCLASS64: 375 machine = "amd64"; 376 break; 377 default: 378 machine = "generic"; 379 break; 380 } 381 if (netbsd_version / 1000000 % 100 == 99) { 382 /* -current */ 383 snprintf(module_base, sizeof(module_base), 384 "/stand/%s/%d.%d.%d/modules", machine, 385 netbsd_version / 100000000, 386 netbsd_version / 1000000 % 100, 387 netbsd_version / 100 % 100); 388 } else if (netbsd_version != 0) { 389 /* release */ 390 snprintf(module_base, sizeof(module_base), 391 "/stand/%s/%d.%d/modules", machine, 392 netbsd_version / 100000000, 393 netbsd_version / 1000000 % 100); 394 } 395 396 /* First, see which modules are valid and calculate btinfo size */ 397 len = sizeof(struct btinfo_modulelist); 398 for (bm = boot_modules; bm; bm = bm->bm_next) { 399 fd = module_open(bm, 0); 400 if (fd == -1) { 401 bm->bm_len = -1; 402 continue; 403 } 404 err = fstat(fd, &st); 405 if (err == -1 || st.st_size == -1) { 406 printf("WARNING: couldn't stat %s\n", bm->bm_path); 407 close(fd); 408 bm->bm_len = -1; 409 continue; 410 } 411 bm->bm_len = st.st_size; 412 close(fd); 413 len += sizeof(struct bi_modulelist_entry); 414 } 415 416 /* Allocate the module list */ 417 btinfo_modulelist = alloc(len); 418 if (btinfo_modulelist == NULL) { 419 printf("WARNING: couldn't allocate module list\n"); 420 return; 421 } 422 memset(btinfo_modulelist, 0, len); 423 btinfo_modulelist_size = len; 424 425 /* Fill in btinfo structure */ 426 buf = (char *)btinfo_modulelist; 427 btinfo_modulelist->num = 0; 428 off = sizeof(struct btinfo_modulelist); 429 430 for (bm = boot_modules; bm; bm = bm->bm_next) { 431 if (bm->bm_len == -1) 432 continue; 433 printf("Loading %s ", bm->bm_path); 434 fd = module_open(bm, 0); 435 if (fd == -1) { 436 printf("ERROR: couldn't open %s\n", bm->bm_path); 437 continue; 438 } 439 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 440 len = pread(fd, (void *)image_end, SSIZE_MAX); 441 if (len < bm->bm_len) { 442 printf(" FAILED\n"); 443 } else { 444 btinfo_modulelist->num++; 445 bi = (struct bi_modulelist_entry *)(buf + off); 446 off += sizeof(struct bi_modulelist_entry); 447 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 448 bi->base = image_end; 449 bi->len = len; 450 bi->type = BI_MODULE_ELF; 451 printf(" \n"); 452 } 453 if (len > 0) 454 image_end += len; 455 close(fd); 456 } 457 btinfo_modulelist->endpa = image_end; 458 } 459 460 int 461 exec_multiboot(const char *file, char *args) 462 { 463 struct multiboot_info *mbi; 464 struct multiboot_module *mbm; 465 struct bi_modulelist_entry *bim; 466 int i, len; 467 u_long marks[MARK_MAX]; 468 u_long extmem; 469 u_long basemem; 470 char *cmdline; 471 472 mbi = alloc(sizeof(struct multiboot_info)); 473 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 474 475 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 476 goto out; 477 478 mbi->mi_mem_upper = extmem; 479 mbi->mi_mem_lower = basemem; 480 481 if (args) { 482 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 483 len = strlen(file) + 1 + strlen(args) + 1; 484 cmdline = alloc(len); 485 snprintf(cmdline, len, "%s %s", file, args); 486 mbi->mi_cmdline = (char *) vtophys(cmdline); 487 } 488 489 /* pull in any modules if necessary */ 490 if (boot_modules_enabled) { 491 module_init(); 492 if (btinfo_modulelist) { 493 mbm = alloc(sizeof(struct multiboot_module) * 494 btinfo_modulelist->num); 495 496 bim = (struct bi_modulelist_entry *) 497 (((char *) btinfo_modulelist) + 498 sizeof(struct btinfo_modulelist)); 499 for (i = 0; i < btinfo_modulelist->num; i++) { 500 mbm[i].mmo_start = bim->base; 501 mbm[i].mmo_end = bim->base + bim->len; 502 mbm[i].mmo_string = (char *)vtophys(bim->path); 503 mbm[i].mmo_reserved = 0; 504 bim++; 505 } 506 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 507 mbi->mi_mods_count = btinfo_modulelist->num; 508 mbi->mi_mods_addr = vtophys(mbm); 509 } 510 } 511 512 #ifdef DEBUG 513 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 514 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 515 #endif 516 517 518 #if 0 519 if (btinfo_symtab.nsym) { 520 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 521 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 522 btinfo_symtab.nsym = marks[MARK_NSYM]; 523 btinfo_symtab.ssym = marks[MARK_SYM]; 524 btinfo_symtab.esym = marks[MARK_END]; 525 #endif 526 527 multiboot(marks[MARK_ENTRY], vtophys(mbi), 528 x86_trunc_page(mbi->mi_mem_lower*1024)); 529 panic("exec returned"); 530 531 out: 532 dealloc(mbi, 0); 533 return -1; 534 } 535
Indexes created Thu Oct 02 14:10:14 GMT 2025