1 /* $NetBSD: exec.c,v 1.45 2010/10/30 08:12:43 jnemeth Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 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 * 75 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 76 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 77 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 78 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 79 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 80 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 81 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 82 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 83 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 84 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 85 * SUCH DAMAGE. 86 * 87 * @(#)boot.c 8.1 (Berkeley) 6/10/93 88 */ 89 90 /* 91 * starts NetBSD a.out kernel 92 * needs lowlevel startup from startprog.S 93 * This is a special version of exec.c to support use of XMS. 94 */ 95 96 #include <sys/param.h> 97 #include <sys/reboot.h> 98 #include <sys/reboot.h> 99 100 #include <machine/multiboot.h> 101 #include <machine/stdarg.h> 102 103 #include <lib/libsa/stand.h> 104 #include <lib/libkern/libkern.h> 105 106 #include "loadfile.h" 107 #include "libi386.h" 108 #include "bootinfo.h" 109 #include "bootmod.h" 110 #include "vbe.h" 111 #ifdef SUPPORT_PS2 112 #include "biosmca.h" 113 #endif 114 115 #define BOOT_NARGS 6 116 117 #ifndef PAGE_SIZE 118 #define PAGE_SIZE 4096 119 #endif 120 121 #define MODULE_WARNING_SEC 5 122 123 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_framebuffer btinfo_framebuffer; 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 static int howto; 136 137 static void module_init(const char *); 138 139 void 140 framebuffer_configure(struct btinfo_framebuffer *fb) 141 { 142 if (fb) 143 btinfo_framebuffer = *fb; 144 else { 145 btinfo_framebuffer.physaddr = 0; 146 btinfo_framebuffer.flags = 0; 147 } 148 } 149 150 void 151 module_add(char *name) 152 { 153 boot_module_t *bm, *bmp; 154 size_t len; 155 char *str; 156 157 while (*name == ' ' || *name == '\t') 158 ++name; 159 160 bm = alloc(sizeof(boot_module_t)); 161 len = strlen(name) + 1; 162 str = alloc(len); 163 if (bm == NULL || str == NULL) { 164 printf("couldn't allocate module\n"); 165 return; 166 } 167 memcpy(str, name, len); 168 bm->bm_path = str; 169 bm->bm_next = NULL; 170 if (boot_modules == NULL) 171 boot_modules = bm; 172 else { 173 for (bmp = boot_modules; bmp->bm_next; 174 bmp = bmp->bm_next) 175 ; 176 bmp->bm_next = bm; 177 } 178 } 179 180 static int 181 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 182 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 183 { 184 int fd; 185 #ifdef XMS 186 u_long xmsmem; 187 physaddr_t origaddr = loadaddr; 188 #endif 189 190 *extmem = getextmem(); 191 *basemem = getbasemem(); 192 193 #ifdef XMS 194 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 195 u_long kernsize; 196 197 /* 198 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 199 * getextmem() is getextmem1(). Without, the "smart" 200 * methods could fail to report all memory as well. 201 * xmsmem is a few kB less than the actual size, but 202 * better than nothing. 203 */ 204 if (xmsmem > *extmem) 205 *extmem = xmsmem; 206 /* 207 * Get the size of the kernel 208 */ 209 marks[MARK_START] = loadaddr; 210 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 211 return EIO; 212 close(fd); 213 214 kernsize = marks[MARK_END]; 215 kernsize = (kernsize + 1023) / 1024; 216 217 loadaddr = xmsalloc(kernsize); 218 if (!loadaddr) 219 return ENOMEM; 220 } 221 #endif 222 marks[MARK_START] = loadaddr; 223 if ((fd = loadfile(file, marks, 224 LOAD_KERNEL & ~(floppy ? LOAD_BACKWARDS : 0))) == -1) 225 return EIO; 226 227 close(fd); 228 229 /* Now we know the root fs type, load modules for it. */ 230 module_add(fsmod); 231 if (fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0) 232 module_add(fsmod2); 233 234 /* 235 * Gather some information for the kernel. Do this after the 236 * "point of no return" to avoid memory leaks. 237 * (but before DOS might be trashed in the XMS case) 238 */ 239 #ifdef PASS_BIOSGEOM 240 bi_getbiosgeom(); 241 #endif 242 #ifdef PASS_MEMMAP 243 bi_getmemmap(); 244 #endif 245 246 #ifdef XMS 247 if (loadaddr != origaddr) { 248 /* 249 * We now have done our last DOS IO, so we may 250 * trash the OS. Copy the data from the temporary 251 * buffer to its real address. 252 */ 253 marks[MARK_START] -= loadaddr; 254 marks[MARK_END] -= loadaddr; 255 marks[MARK_SYM] -= loadaddr; 256 marks[MARK_END] -= loadaddr; 257 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 258 } 259 #endif 260 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 261 (-sizeof(int)); 262 image_end = marks[MARK_END]; 263 kernel_loaded = true; 264 265 return 0; 266 } 267 268 int 269 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy, 270 void (*callback)(void)) 271 { 272 u_long boot_argv[BOOT_NARGS]; 273 u_long marks[MARK_MAX]; 274 struct btinfo_symtab btinfo_symtab; 275 u_long extmem; 276 u_long basemem; 277 278 #ifdef DEBUG 279 printf("exec: file=%s loadaddr=0x%lx\n", 280 file ? file : "NULL", loadaddr); 281 #endif 282 283 BI_ALLOC(32); /* ??? */ 284 285 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 286 287 howto = boothowto; 288 289 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 290 goto out; 291 292 boot_argv[0] = boothowto; 293 boot_argv[1] = 0; 294 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 295 boot_argv[3] = marks[MARK_END]; 296 boot_argv[4] = extmem; 297 boot_argv[5] = basemem; 298 299 /* pull in any modules if necessary */ 300 if (boot_modules_enabled) { 301 module_init(file); 302 if (btinfo_modulelist) { 303 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 304 btinfo_modulelist_size); 305 } 306 } 307 308 #ifdef DEBUG 309 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 310 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 311 #endif 312 313 btinfo_symtab.nsym = marks[MARK_NSYM]; 314 btinfo_symtab.ssym = marks[MARK_SYM]; 315 btinfo_symtab.esym = marks[MARK_END]; 316 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 317 318 /* set new video mode if necessary */ 319 vbe_commit(); 320 BI_ADD(&btinfo_framebuffer, BTINFO_FRAMEBUFFER, 321 sizeof(struct btinfo_framebuffer)); 322 323 if (callback != NULL) 324 (*callback)(); 325 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 326 x86_trunc_page(basemem*1024)); 327 panic("exec returned"); 328 329 out: 330 BI_FREE(); 331 bootinfo = 0; 332 return -1; 333 } 334 335 static void 336 extract_device(const char *path, char *buf, size_t buflen) 337 { 338 int i; 339 340 if (strchr(path, ':') != NULL) { 341 for (i = 0; i < buflen - 2 && path[i] != ':'; i++) 342 buf[i] = path[i]; 343 buf[i++] = ':'; 344 buf[i] = '\0'; 345 } else 346 buf[0] = '\0'; 347 } 348 349 static const char * 350 module_path(boot_module_t *bm, const char *kdev) 351 { 352 static char buf[256]; 353 char name_buf[256], dev_buf[64]; 354 const char *name, *name2, *p; 355 356 name = bm->bm_path; 357 for (name2 = name; *name2; ++name2) { 358 if (*name2 == ' ' || *name2 == '\t') { 359 strlcpy(name_buf, name, sizeof(name_buf)); 360 if (name2 - name < sizeof(name_buf)) 361 name_buf[name2 - name] = '\0'; 362 name = name_buf; 363 break; 364 } 365 } 366 if ((p = strchr(name, ':')) != NULL) { 367 /* device specified, use it */ 368 if (p[1] == '/') 369 snprintf(buf, sizeof(buf), "%s", name); 370 else { 371 p++; 372 extract_device(name, dev_buf, sizeof(dev_buf)); 373 snprintf(buf, sizeof(buf), "%s%s/%s/%s.kmod", 374 dev_buf, module_base, p, p); 375 } 376 } else { 377 /* device not specified; load from kernel device if known */ 378 if (name[0] == '/') 379 snprintf(buf, sizeof(buf), "%s%s", kdev, name); 380 else 381 snprintf(buf, sizeof(buf), "%s%s/%s/%s.kmod", 382 kdev, module_base, name, name); 383 } 384 385 return buf; 386 } 387 388 static int 389 module_open(boot_module_t *bm, int mode, const char *kdev, bool doload) 390 { 391 int fd; 392 const char *path; 393 394 /* check the expanded path first */ 395 path = module_path(bm, kdev); 396 fd = open(path, mode); 397 if (fd != -1) { 398 if ((howto & AB_SILENT) == 0 && doload) 399 printf("Loading %s ", path); 400 } else { 401 /* now attempt the raw path provided */ 402 fd = open(bm->bm_path, mode); 403 if (fd != -1 && (howto & AB_SILENT) == 0 && doload) 404 printf("Loading %s ", bm->bm_path); 405 } 406 if (!doload && fd == -1) { 407 printf("WARNING: couldn't open %s", bm->bm_path); 408 if (strcmp(bm->bm_path, path) != 0) 409 printf(" (%s)", path); 410 printf("\n"); 411 } 412 return fd; 413 } 414 415 static void 416 module_init(const char *kernel_path) 417 { 418 struct bi_modulelist_entry *bi; 419 struct stat st; 420 const char *machine; 421 char kdev[64]; 422 char *buf; 423 boot_module_t *bm; 424 size_t len; 425 off_t off; 426 int err, fd, nfail = 0; 427 428 extract_device(kernel_path, kdev, sizeof(kdev)); 429 430 switch (netbsd_elf_class) { 431 case ELFCLASS32: 432 machine = "i386"; 433 break; 434 case ELFCLASS64: 435 machine = "amd64"; 436 break; 437 default: 438 machine = "generic"; 439 break; 440 } 441 if (netbsd_version / 1000000 % 100 == 99) { 442 /* -current */ 443 snprintf(module_base, sizeof(module_base), 444 "/stand/%s/%d.%d.%d/modules", machine, 445 netbsd_version / 100000000, 446 netbsd_version / 1000000 % 100, 447 netbsd_version / 100 % 100); 448 } else if (netbsd_version != 0) { 449 /* release */ 450 snprintf(module_base, sizeof(module_base), 451 "/stand/%s/%d.%d/modules", machine, 452 netbsd_version / 100000000, 453 netbsd_version / 1000000 % 100); 454 } 455 456 /* First, see which modules are valid and calculate btinfo size */ 457 len = sizeof(struct btinfo_modulelist); 458 for (bm = boot_modules; bm; bm = bm->bm_next) { 459 fd = module_open(bm, 0, kdev, false); 460 if (fd == -1) { 461 bm->bm_len = -1; 462 ++nfail; 463 continue; 464 } 465 err = fstat(fd, &st); 466 if (err == -1 || st.st_size == -1) { 467 printf("WARNING: couldn't stat %s\n", bm->bm_path); 468 close(fd); 469 bm->bm_len = -1; 470 ++nfail; 471 continue; 472 } 473 bm->bm_len = st.st_size; 474 close(fd); 475 len += sizeof(struct bi_modulelist_entry); 476 } 477 478 /* Allocate the module list */ 479 btinfo_modulelist = alloc(len); 480 if (btinfo_modulelist == NULL) { 481 printf("WARNING: couldn't allocate module list\n"); 482 wait_sec(MODULE_WARNING_SEC); 483 return; 484 } 485 memset(btinfo_modulelist, 0, len); 486 btinfo_modulelist_size = len; 487 488 /* Fill in btinfo structure */ 489 buf = (char *)btinfo_modulelist; 490 btinfo_modulelist->num = 0; 491 off = sizeof(struct btinfo_modulelist); 492 493 for (bm = boot_modules; bm; bm = bm->bm_next) { 494 if (bm->bm_len == -1) 495 continue; 496 fd = module_open(bm, 0, kdev, true); 497 if (fd == -1) 498 continue; 499 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 500 len = pread(fd, (void *)image_end, SSIZE_MAX); 501 if (len < bm->bm_len) { 502 if ((howto & AB_SILENT) != 0) 503 printf("Loading %s ", bm->bm_path); 504 printf(" FAILED\n"); 505 } else { 506 btinfo_modulelist->num++; 507 bi = (struct bi_modulelist_entry *)(buf + off); 508 off += sizeof(struct bi_modulelist_entry); 509 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 510 bi->base = image_end; 511 bi->len = len; 512 bi->type = BI_MODULE_ELF; 513 if ((howto & AB_SILENT) == 0) 514 printf(" \n"); 515 } 516 if (len > 0) 517 image_end += len; 518 close(fd); 519 } 520 btinfo_modulelist->endpa = image_end; 521 522 if (nfail > 0) { 523 printf("WARNING: %d module%s failed to load\n", 524 nfail, nfail == 1 ? "" : "s"); 525 #if notyet 526 wait_sec(MODULE_WARNING_SEC); 527 #endif 528 } 529 } 530 531 int 532 exec_multiboot(const char *file, char *args) 533 { 534 struct multiboot_info *mbi; 535 struct multiboot_module *mbm; 536 struct bi_modulelist_entry *bim; 537 int i, len; 538 u_long marks[MARK_MAX]; 539 u_long extmem; 540 u_long basemem; 541 char *cmdline; 542 543 mbi = alloc(sizeof(struct multiboot_info)); 544 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 545 546 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 547 goto out; 548 549 mbi->mi_mem_upper = extmem; 550 mbi->mi_mem_lower = basemem; 551 552 if (args) { 553 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 554 len = strlen(file) + 1 + strlen(args) + 1; 555 cmdline = alloc(len); 556 snprintf(cmdline, len, "%s %s", file, args); 557 mbi->mi_cmdline = (char *) vtophys(cmdline); 558 } 559 560 /* pull in any modules if necessary */ 561 if (boot_modules_enabled) { 562 module_init(file); 563 if (btinfo_modulelist) { 564 mbm = alloc(sizeof(struct multiboot_module) * 565 btinfo_modulelist->num); 566 567 bim = (struct bi_modulelist_entry *) 568 (((char *) btinfo_modulelist) + 569 sizeof(struct btinfo_modulelist)); 570 for (i = 0; i < btinfo_modulelist->num; i++) { 571 mbm[i].mmo_start = bim->base; 572 mbm[i].mmo_end = bim->base + bim->len; 573 mbm[i].mmo_string = (char *)vtophys(bim->path); 574 mbm[i].mmo_reserved = 0; 575 bim++; 576 } 577 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 578 mbi->mi_mods_count = btinfo_modulelist->num; 579 mbi->mi_mods_addr = vtophys(mbm); 580 } 581 } 582 583 #ifdef DEBUG 584 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 585 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 586 #endif 587 588 589 #if 0 590 if (btinfo_symtab.nsym) { 591 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 592 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 593 btinfo_symtab.nsym = marks[MARK_NSYM]; 594 btinfo_symtab.ssym = marks[MARK_SYM]; 595 btinfo_symtab.esym = marks[MARK_END]; 596 #endif 597 598 multiboot(marks[MARK_ENTRY], vtophys(mbi), 599 x86_trunc_page(mbi->mi_mem_lower*1024)); 600 panic("exec returned"); 601 602 out: 603 dealloc(mbi, 0); 604 return -1; 605 } 606 607 void 608 x86_progress(const char *fmt, ...) 609 { 610 va_list ap; 611 612 if ((howto & AB_SILENT) != 0) 613 return; 614 va_start(ap, fmt); 615 vprintf(fmt, ap); 616 va_end(ap); 617 } 618