exec.c revision 1.38.2.3
1 /* $NetBSD: exec.c,v 1.38.2.3 2011/03/28 23:04:46 jym 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 * 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 #include <sys/reboot.h> 106 107 #include <machine/multiboot.h> 108 #include <machine/stdarg.h> 109 110 #include <lib/libsa/stand.h> 111 #include <lib/libkern/libkern.h> 112 113 #include "loadfile.h" 114 #include "libi386.h" 115 #include "bootinfo.h" 116 #include "bootmod.h" 117 #include "vbe.h" 118 #ifdef SUPPORT_PS2 119 #include "biosmca.h" 120 #endif 121 122 #define BOOT_NARGS 6 123 124 #ifndef PAGE_SIZE 125 #define PAGE_SIZE 4096 126 #endif 127 128 #define MODULE_WARNING_DELAY 5000000 129 130 extern struct btinfo_console btinfo_console; 131 132 boot_module_t *boot_modules; 133 bool boot_modules_enabled = true; 134 bool kernel_loaded; 135 136 static struct btinfo_framebuffer btinfo_framebuffer; 137 138 static struct btinfo_modulelist *btinfo_modulelist; 139 static size_t btinfo_modulelist_size; 140 static uint32_t image_end; 141 static char module_base[64] = "/"; 142 static int howto; 143 144 static void module_init(const char *); 145 static void module_add_common(char *, uint8_t); 146 147 void 148 framebuffer_configure(struct btinfo_framebuffer *fb) 149 { 150 if (fb) 151 btinfo_framebuffer = *fb; 152 else { 153 btinfo_framebuffer.physaddr = 0; 154 btinfo_framebuffer.flags = 0; 155 } 156 } 157 158 void 159 module_add(char *name) 160 { 161 return module_add_common(name, BM_TYPE_KMOD); 162 } 163 164 void 165 splash_add(char *name) 166 { 167 return module_add_common(name, BM_TYPE_IMAGE); 168 } 169 170 static void 171 module_add_common(char *name, uint8_t type) 172 { 173 boot_module_t *bm, *bmp; 174 size_t len; 175 char *str; 176 177 while (*name == ' ' || *name == '\t') 178 ++name; 179 180 bm = alloc(sizeof(boot_module_t)); 181 len = strlen(name) + 1; 182 str = alloc(len); 183 if (bm == NULL || str == NULL) { 184 printf("couldn't allocate module\n"); 185 return; 186 } 187 memcpy(str, name, len); 188 bm->bm_path = str; 189 bm->bm_next = NULL; 190 bm->bm_type = type; 191 if (boot_modules == NULL) 192 boot_modules = bm; 193 else { 194 for (bmp = boot_modules; bmp->bm_next; 195 bmp = bmp->bm_next) 196 ; 197 bmp->bm_next = bm; 198 } 199 } 200 201 static int 202 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 203 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 204 { 205 int fd; 206 #ifdef XMS 207 u_long xmsmem; 208 physaddr_t origaddr = loadaddr; 209 #endif 210 211 *extmem = getextmem(); 212 *basemem = getbasemem(); 213 214 #ifdef XMS 215 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 216 u_long kernsize; 217 218 /* 219 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 220 * getextmem() is getextmem1(). Without, the "smart" 221 * methods could fail to report all memory as well. 222 * xmsmem is a few kB less than the actual size, but 223 * better than nothing. 224 */ 225 if (xmsmem > *extmem) 226 *extmem = xmsmem; 227 /* 228 * Get the size of the kernel 229 */ 230 marks[MARK_START] = loadaddr; 231 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 232 return EIO; 233 close(fd); 234 235 kernsize = marks[MARK_END]; 236 kernsize = (kernsize + 1023) / 1024; 237 238 loadaddr = xmsalloc(kernsize); 239 if (!loadaddr) 240 return ENOMEM; 241 } 242 #endif 243 marks[MARK_START] = loadaddr; 244 if ((fd = loadfile(file, marks, 245 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 246 return EIO; 247 248 close(fd); 249 250 /* Now we know the root fs type, load modules for it. */ 251 module_add(fsmod); 252 if (fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0) 253 module_add(fsmod2); 254 255 /* 256 * Gather some information for the kernel. Do this after the 257 * "point of no return" to avoid memory leaks. 258 * (but before DOS might be trashed in the XMS case) 259 */ 260 #ifdef PASS_BIOSGEOM 261 bi_getbiosgeom(); 262 #endif 263 #ifdef PASS_MEMMAP 264 bi_getmemmap(); 265 #endif 266 267 #ifdef XMS 268 if (loadaddr != origaddr) { 269 /* 270 * We now have done our last DOS IO, so we may 271 * trash the OS. Copy the data from the temporary 272 * buffer to its real address. 273 */ 274 marks[MARK_START] -= loadaddr; 275 marks[MARK_END] -= loadaddr; 276 marks[MARK_SYM] -= loadaddr; 277 marks[MARK_END] -= loadaddr; 278 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 279 } 280 #endif 281 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 282 (-sizeof(int)); 283 image_end = marks[MARK_END]; 284 kernel_loaded = true; 285 286 return 0; 287 } 288 289 int 290 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy, 291 void (*callback)(void)) 292 { 293 u_long boot_argv[BOOT_NARGS]; 294 u_long marks[MARK_MAX]; 295 struct btinfo_symtab btinfo_symtab; 296 u_long extmem; 297 u_long basemem; 298 299 #ifdef DEBUG 300 printf("exec: file=%s loadaddr=0x%lx\n", 301 file ? file : "NULL", loadaddr); 302 #endif 303 304 BI_ALLOC(32); /* ??? */ 305 306 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 307 308 howto = boothowto; 309 310 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 311 goto out; 312 313 boot_argv[0] = boothowto; 314 boot_argv[1] = 0; 315 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 316 boot_argv[3] = marks[MARK_END]; 317 boot_argv[4] = extmem; 318 boot_argv[5] = basemem; 319 320 /* pull in any modules if necessary */ 321 if (boot_modules_enabled) { 322 module_init(file); 323 if (btinfo_modulelist) { 324 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 325 btinfo_modulelist_size); 326 } 327 } 328 329 #ifdef DEBUG 330 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 331 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 332 #endif 333 334 btinfo_symtab.nsym = marks[MARK_NSYM]; 335 btinfo_symtab.ssym = marks[MARK_SYM]; 336 btinfo_symtab.esym = marks[MARK_END]; 337 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 338 339 /* set new video mode if necessary */ 340 vbe_commit(); 341 BI_ADD(&btinfo_framebuffer, BTINFO_FRAMEBUFFER, 342 sizeof(struct btinfo_framebuffer)); 343 344 if (callback != NULL) 345 (*callback)(); 346 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 347 x86_trunc_page(basemem*1024)); 348 panic("exec returned"); 349 350 out: 351 BI_FREE(); 352 bootinfo = 0; 353 return -1; 354 } 355 356 static void 357 extract_device(const char *path, char *buf, size_t buflen) 358 { 359 int i; 360 361 if (strchr(path, ':') != NULL) { 362 for (i = 0; i < buflen - 2 && path[i] != ':'; i++) 363 buf[i] = path[i]; 364 buf[i++] = ':'; 365 buf[i] = '\0'; 366 } else 367 buf[0] = '\0'; 368 } 369 370 static const char * 371 module_path(boot_module_t *bm, const char *kdev) 372 { 373 static char buf[256]; 374 char name_buf[256], dev_buf[64]; 375 const char *name, *name2, *p; 376 377 name = bm->bm_path; 378 for (name2 = name; *name2; ++name2) { 379 if (*name2 == ' ' || *name2 == '\t') { 380 strlcpy(name_buf, name, sizeof(name_buf)); 381 if (name2 - name < sizeof(name_buf)) 382 name_buf[name2 - name] = '\0'; 383 name = name_buf; 384 break; 385 } 386 } 387 if ((p = strchr(name, ':')) != NULL) { 388 /* device specified, use it */ 389 if (p[1] == '/') 390 snprintf(buf, sizeof(buf), "%s", name); 391 else { 392 p++; 393 extract_device(name, dev_buf, sizeof(dev_buf)); 394 snprintf(buf, sizeof(buf), "%s%s/%s/%s.kmod", 395 dev_buf, module_base, p, p); 396 } 397 } else { 398 /* device not specified; load from kernel device if known */ 399 if (name[0] == '/') 400 snprintf(buf, sizeof(buf), "%s%s", kdev, name); 401 else 402 snprintf(buf, sizeof(buf), "%s%s/%s/%s.kmod", 403 kdev, module_base, name, name); 404 } 405 406 return buf; 407 } 408 409 static int 410 module_open(boot_module_t *bm, int mode, const char *kdev, bool doload) 411 { 412 int fd; 413 const char *path; 414 415 /* check the expanded path first */ 416 path = module_path(bm, kdev); 417 fd = open(path, mode); 418 if (fd != -1) { 419 if ((howto & AB_SILENT) == 0 && doload) 420 printf("Loading %s ", path); 421 } else { 422 /* now attempt the raw path provided */ 423 fd = open(bm->bm_path, mode); 424 if (fd != -1 && (howto & AB_SILENT) == 0 && doload) 425 printf("Loading %s ", bm->bm_path); 426 } 427 if (!doload && fd == -1) { 428 printf("WARNING: couldn't open %s", bm->bm_path); 429 if (strcmp(bm->bm_path, path) != 0) 430 printf(" (%s)", path); 431 printf("\n"); 432 } 433 return fd; 434 } 435 436 static void 437 module_init(const char *kernel_path) 438 { 439 struct bi_modulelist_entry *bi; 440 struct stat st; 441 const char *machine; 442 char kdev[64]; 443 char *buf; 444 boot_module_t *bm; 445 size_t len; 446 off_t off; 447 int err, fd, nfail = 0; 448 449 extract_device(kernel_path, kdev, sizeof(kdev)); 450 451 switch (netbsd_elf_class) { 452 case ELFCLASS32: 453 machine = "i386"; 454 break; 455 case ELFCLASS64: 456 machine = "amd64"; 457 break; 458 default: 459 machine = "generic"; 460 break; 461 } 462 if (netbsd_version / 1000000 % 100 == 99) { 463 /* -current */ 464 snprintf(module_base, sizeof(module_base), 465 "/stand/%s/%d.%d.%d/modules", machine, 466 netbsd_version / 100000000, 467 netbsd_version / 1000000 % 100, 468 netbsd_version / 100 % 100); 469 } else if (netbsd_version != 0) { 470 /* release */ 471 snprintf(module_base, sizeof(module_base), 472 "/stand/%s/%d.%d/modules", machine, 473 netbsd_version / 100000000, 474 netbsd_version / 1000000 % 100); 475 } 476 477 /* First, see which modules are valid and calculate btinfo size */ 478 len = sizeof(struct btinfo_modulelist); 479 for (bm = boot_modules; bm; bm = bm->bm_next) { 480 fd = module_open(bm, 0, kdev, false); 481 if (fd == -1) { 482 bm->bm_len = -1; 483 ++nfail; 484 continue; 485 } 486 err = fstat(fd, &st); 487 if (err == -1 || st.st_size == -1) { 488 printf("WARNING: couldn't stat %s\n", bm->bm_path); 489 close(fd); 490 bm->bm_len = -1; 491 ++nfail; 492 continue; 493 } 494 bm->bm_len = st.st_size; 495 close(fd); 496 len += sizeof(struct bi_modulelist_entry); 497 } 498 499 /* Allocate the module list */ 500 btinfo_modulelist = alloc(len); 501 if (btinfo_modulelist == NULL) { 502 printf("WARNING: couldn't allocate module list\n"); 503 delay(MODULE_WARNING_DELAY); 504 return; 505 } 506 memset(btinfo_modulelist, 0, len); 507 btinfo_modulelist_size = len; 508 509 /* Fill in btinfo structure */ 510 buf = (char *)btinfo_modulelist; 511 btinfo_modulelist->num = 0; 512 off = sizeof(struct btinfo_modulelist); 513 514 for (bm = boot_modules; bm; bm = bm->bm_next) { 515 if (bm->bm_len == -1) 516 continue; 517 fd = module_open(bm, 0, kdev, true); 518 if (fd == -1) 519 continue; 520 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 521 len = pread(fd, (void *)image_end, SSIZE_MAX); 522 if (len < bm->bm_len) { 523 if ((howto & AB_SILENT) != 0) 524 printf("Loading %s ", bm->bm_path); 525 printf(" FAILED\n"); 526 } else { 527 btinfo_modulelist->num++; 528 bi = (struct bi_modulelist_entry *)(buf + off); 529 off += sizeof(struct bi_modulelist_entry); 530 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 531 bi->base = image_end; 532 bi->len = len; 533 bi->type = bm->bm_type == BM_TYPE_KMOD ? 534 BI_MODULE_ELF : BI_MODULE_IMAGE; 535 if ((howto & AB_SILENT) == 0) 536 printf(" \n"); 537 } 538 if (len > 0) 539 image_end += len; 540 close(fd); 541 } 542 btinfo_modulelist->endpa = image_end; 543 544 if (nfail > 0) { 545 printf("WARNING: %d module%s failed to load\n", 546 nfail, nfail == 1 ? "" : "s"); 547 #if notyet 548 delay(MODULE_WARNING_DELAY); 549 #endif 550 } 551 } 552 553 int 554 exec_multiboot(const char *file, char *args) 555 { 556 struct multiboot_info *mbi; 557 struct multiboot_module *mbm; 558 struct bi_modulelist_entry *bim; 559 int i, len; 560 u_long marks[MARK_MAX]; 561 u_long extmem; 562 u_long basemem; 563 char *cmdline; 564 565 mbi = alloc(sizeof(struct multiboot_info)); 566 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 567 568 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 569 goto out; 570 571 mbi->mi_mem_upper = extmem; 572 mbi->mi_mem_lower = basemem; 573 574 if (args) { 575 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 576 len = strlen(file) + 1 + strlen(args) + 1; 577 cmdline = alloc(len); 578 snprintf(cmdline, len, "%s %s", file, args); 579 mbi->mi_cmdline = (char *) vtophys(cmdline); 580 } 581 582 /* pull in any modules if necessary */ 583 if (boot_modules_enabled) { 584 module_init(file); 585 if (btinfo_modulelist) { 586 mbm = alloc(sizeof(struct multiboot_module) * 587 btinfo_modulelist->num); 588 589 bim = (struct bi_modulelist_entry *) 590 (((char *) btinfo_modulelist) + 591 sizeof(struct btinfo_modulelist)); 592 for (i = 0; i < btinfo_modulelist->num; i++) { 593 mbm[i].mmo_start = bim->base; 594 mbm[i].mmo_end = bim->base + bim->len; 595 mbm[i].mmo_string = (char *)vtophys(bim->path); 596 mbm[i].mmo_reserved = 0; 597 bim++; 598 } 599 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 600 mbi->mi_mods_count = btinfo_modulelist->num; 601 mbi->mi_mods_addr = vtophys(mbm); 602 } 603 } 604 605 #ifdef DEBUG 606 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 607 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 608 #endif 609 610 611 #if 0 612 if (btinfo_symtab.nsym) { 613 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 614 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 615 btinfo_symtab.nsym = marks[MARK_NSYM]; 616 btinfo_symtab.ssym = marks[MARK_SYM]; 617 btinfo_symtab.esym = marks[MARK_END]; 618 #endif 619 620 multiboot(marks[MARK_ENTRY], vtophys(mbi), 621 x86_trunc_page(mbi->mi_mem_lower*1024)); 622 panic("exec returned"); 623 624 out: 625 dealloc(mbi, 0); 626 return -1; 627 } 628 629 void 630 x86_progress(const char *fmt, ...) 631 { 632 va_list ap; 633 634 if ((howto & AB_SILENT) != 0) 635 return; 636 va_start(ap, fmt); 637 vprintf(fmt, ap); 638 va_end(ap); 639 } 640
Indexes created Thu Oct 02 14:10:14 GMT 2025