exec.c revision 1.42
1 /* $NetBSD: exec.c,v 1.42 2009/09/14 11:56:27 jmcneill 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 *); 145 146 void 147 framebuffer_configure(struct btinfo_framebuffer *fb) 148 { 149 if (fb) 150 btinfo_framebuffer = *fb; 151 else { 152 btinfo_framebuffer.physaddr = 0; 153 btinfo_framebuffer.flags = 0; 154 } 155 } 156 157 void 158 module_add(char *name) 159 { 160 boot_module_t *bm, *bmp; 161 size_t len; 162 char *str; 163 164 while (*name == ' ' || *name == '\t') 165 ++name; 166 167 bm = alloc(sizeof(boot_module_t)); 168 len = strlen(name) + 1; 169 str = alloc(len); 170 if (bm == NULL || str == NULL) { 171 printf("couldn't allocate module\n"); 172 return; 173 } 174 memcpy(str, name, len); 175 bm->bm_path = str; 176 bm->bm_next = NULL; 177 if (boot_modules == NULL) 178 boot_modules = bm; 179 else { 180 for (bmp = boot_modules; bmp->bm_next; 181 bmp = bmp->bm_next) 182 ; 183 bmp->bm_next = bm; 184 } 185 } 186 187 static int 188 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 189 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 190 { 191 int fd; 192 #ifdef XMS 193 u_long xmsmem; 194 physaddr_t origaddr = loadaddr; 195 #endif 196 197 *extmem = getextmem(); 198 *basemem = getbasemem(); 199 200 #ifdef XMS 201 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 202 u_long kernsize; 203 204 /* 205 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 206 * getextmem() is getextmem1(). Without, the "smart" 207 * methods could fail to report all memory as well. 208 * xmsmem is a few kB less than the actual size, but 209 * better than nothing. 210 */ 211 if (xmsmem > *extmem) 212 *extmem = xmsmem; 213 /* 214 * Get the size of the kernel 215 */ 216 marks[MARK_START] = loadaddr; 217 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 218 return EIO; 219 close(fd); 220 221 kernsize = marks[MARK_END]; 222 kernsize = (kernsize + 1023) / 1024; 223 224 loadaddr = xmsalloc(kernsize); 225 if (!loadaddr) 226 return ENOMEM; 227 } 228 #endif 229 marks[MARK_START] = loadaddr; 230 if ((fd = loadfile(file, marks, 231 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 232 return EIO; 233 234 close(fd); 235 236 /* Now we know the root fs type, load modules for it. */ 237 module_add(fsmod); 238 if (fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0) 239 module_add(fsmod2); 240 241 /* 242 * Gather some information for the kernel. Do this after the 243 * "point of no return" to avoid memory leaks. 244 * (but before DOS might be trashed in the XMS case) 245 */ 246 #ifdef PASS_BIOSGEOM 247 bi_getbiosgeom(); 248 #endif 249 #ifdef PASS_MEMMAP 250 bi_getmemmap(); 251 #endif 252 253 #ifdef XMS 254 if (loadaddr != origaddr) { 255 /* 256 * We now have done our last DOS IO, so we may 257 * trash the OS. Copy the data from the temporary 258 * buffer to its real address. 259 */ 260 marks[MARK_START] -= loadaddr; 261 marks[MARK_END] -= loadaddr; 262 marks[MARK_SYM] -= loadaddr; 263 marks[MARK_END] -= loadaddr; 264 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 265 } 266 #endif 267 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 268 (-sizeof(int)); 269 image_end = marks[MARK_END]; 270 kernel_loaded = true; 271 272 return 0; 273 } 274 275 int 276 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy, 277 void (*callback)(void)) 278 { 279 u_long boot_argv[BOOT_NARGS]; 280 u_long marks[MARK_MAX]; 281 struct btinfo_symtab btinfo_symtab; 282 u_long extmem; 283 u_long basemem; 284 285 #ifdef DEBUG 286 printf("exec: file=%s loadaddr=0x%lx\n", 287 file ? file : "NULL", loadaddr); 288 #endif 289 290 BI_ALLOC(32); /* ??? */ 291 292 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 293 294 howto = boothowto; 295 296 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 297 goto out; 298 299 boot_argv[0] = boothowto; 300 boot_argv[1] = 0; 301 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 302 boot_argv[3] = marks[MARK_END]; 303 boot_argv[4] = extmem; 304 boot_argv[5] = basemem; 305 306 /* pull in any modules if necessary */ 307 if (boot_modules_enabled) { 308 module_init(file); 309 if (btinfo_modulelist) { 310 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 311 btinfo_modulelist_size); 312 } 313 } 314 315 #ifdef DEBUG 316 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 317 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 318 #endif 319 320 btinfo_symtab.nsym = marks[MARK_NSYM]; 321 btinfo_symtab.ssym = marks[MARK_SYM]; 322 btinfo_symtab.esym = marks[MARK_END]; 323 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 324 325 /* set new video mode if necessary */ 326 vbe_commit(); 327 BI_ADD(&btinfo_framebuffer, BTINFO_FRAMEBUFFER, 328 sizeof(struct btinfo_framebuffer)); 329 330 if (callback != NULL) 331 (*callback)(); 332 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 333 x86_trunc_page(basemem*1024)); 334 panic("exec returned"); 335 336 out: 337 BI_FREE(); 338 bootinfo = 0; 339 return -1; 340 } 341 342 static void 343 extract_device(const char *path, char *buf, size_t buflen) 344 { 345 int i; 346 347 if (strchr(path, ':') != NULL) { 348 for (i = 0; i < buflen - 2 && path[i] != ':'; i++) 349 buf[i] = path[i]; 350 buf[i++] = ':'; 351 buf[i] = '\0'; 352 } else 353 buf[0] = '\0'; 354 } 355 356 static const char * 357 module_path(boot_module_t *bm, const char *kdev) 358 { 359 static char buf[256]; 360 char name_buf[256], dev_buf[64]; 361 const char *name, *name2, *p; 362 363 name = bm->bm_path; 364 for (name2 = name; *name2; ++name2) { 365 if (*name2 == ' ' || *name2 == '\t') { 366 strlcpy(name_buf, name, sizeof(name_buf)); 367 if (name2 - name < sizeof(name_buf)) 368 name_buf[name2 - name] = '\0'; 369 name = name_buf; 370 break; 371 } 372 } 373 if ((p = strchr(name, ':')) != NULL) { 374 /* device specified, use it */ 375 if (p[1] == '/') 376 snprintf(buf, sizeof(buf), "%s", name); 377 else { 378 p++; 379 extract_device(name, dev_buf, sizeof(dev_buf)); 380 snprintf(buf, sizeof(buf), "%s%s/%s/%s.kmod", 381 dev_buf, module_base, p, p); 382 } 383 } else { 384 /* device not specified; load from kernel device if known */ 385 if (name[0] == '/') 386 snprintf(buf, sizeof(buf), "%s%s", kdev, name); 387 else 388 snprintf(buf, sizeof(buf), "%s%s/%s/%s.kmod", 389 kdev, module_base, name, name); 390 } 391 392 return buf; 393 } 394 395 static int 396 module_open(boot_module_t *bm, int mode, const char *kdev, bool doload) 397 { 398 int fd; 399 const char *path; 400 401 /* check the expanded path first */ 402 path = module_path(bm, kdev); 403 fd = open(path, mode); 404 if (fd != -1) { 405 if ((howto & AB_SILENT) == 0 && doload) 406 printf("Loading %s ", path); 407 } else { 408 /* now attempt the raw path provided */ 409 fd = open(bm->bm_path, mode); 410 if (fd != -1 && (howto & AB_SILENT) == 0 && doload) 411 printf("Loading %s ", bm->bm_path); 412 } 413 if (!doload && fd == -1) { 414 printf("WARNING: couldn't open %s", bm->bm_path); 415 if (strcmp(bm->bm_path, path) != 0) 416 printf(" (%s)", path); 417 printf("\n"); 418 } 419 return fd; 420 } 421 422 static void 423 module_init(const char *kernel_path) 424 { 425 struct bi_modulelist_entry *bi; 426 struct stat st; 427 const char *machine; 428 char kdev[64]; 429 char *buf; 430 boot_module_t *bm; 431 size_t len; 432 off_t off; 433 int err, fd, nfail = 0; 434 435 extract_device(kernel_path, kdev, sizeof(kdev)); 436 437 switch (netbsd_elf_class) { 438 case ELFCLASS32: 439 machine = "i386"; 440 break; 441 case ELFCLASS64: 442 machine = "amd64"; 443 break; 444 default: 445 machine = "generic"; 446 break; 447 } 448 if (netbsd_version / 1000000 % 100 == 99) { 449 /* -current */ 450 snprintf(module_base, sizeof(module_base), 451 "/stand/%s/%d.%d.%d/modules", machine, 452 netbsd_version / 100000000, 453 netbsd_version / 1000000 % 100, 454 netbsd_version / 100 % 100); 455 } else if (netbsd_version != 0) { 456 /* release */ 457 snprintf(module_base, sizeof(module_base), 458 "/stand/%s/%d.%d/modules", machine, 459 netbsd_version / 100000000, 460 netbsd_version / 1000000 % 100); 461 } 462 463 /* First, see which modules are valid and calculate btinfo size */ 464 len = sizeof(struct btinfo_modulelist); 465 for (bm = boot_modules; bm; bm = bm->bm_next) { 466 fd = module_open(bm, 0, kdev, false); 467 if (fd == -1) { 468 bm->bm_len = -1; 469 ++nfail; 470 continue; 471 } 472 err = fstat(fd, &st); 473 if (err == -1 || st.st_size == -1) { 474 printf("WARNING: couldn't stat %s\n", bm->bm_path); 475 close(fd); 476 bm->bm_len = -1; 477 ++nfail; 478 continue; 479 } 480 bm->bm_len = st.st_size; 481 close(fd); 482 len += sizeof(struct bi_modulelist_entry); 483 } 484 485 /* Allocate the module list */ 486 btinfo_modulelist = alloc(len); 487 if (btinfo_modulelist == NULL) { 488 printf("WARNING: couldn't allocate module list\n"); 489 delay(MODULE_WARNING_DELAY); 490 return; 491 } 492 memset(btinfo_modulelist, 0, len); 493 btinfo_modulelist_size = len; 494 495 /* Fill in btinfo structure */ 496 buf = (char *)btinfo_modulelist; 497 btinfo_modulelist->num = 0; 498 off = sizeof(struct btinfo_modulelist); 499 500 for (bm = boot_modules; bm; bm = bm->bm_next) { 501 if (bm->bm_len == -1) 502 continue; 503 fd = module_open(bm, 0, kdev, true); 504 if (fd == -1) 505 continue; 506 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 507 len = pread(fd, (void *)image_end, SSIZE_MAX); 508 if (len < bm->bm_len) { 509 if ((howto & AB_SILENT) != 0) 510 printf("Loading %s ", bm->bm_path); 511 printf(" FAILED\n"); 512 } else { 513 btinfo_modulelist->num++; 514 bi = (struct bi_modulelist_entry *)(buf + off); 515 off += sizeof(struct bi_modulelist_entry); 516 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 517 bi->base = image_end; 518 bi->len = len; 519 bi->type = BI_MODULE_ELF; 520 if ((howto & AB_SILENT) == 0) 521 printf(" \n"); 522 } 523 if (len > 0) 524 image_end += len; 525 close(fd); 526 } 527 btinfo_modulelist->endpa = image_end; 528 529 if (nfail > 0) { 530 printf("WARNING: %d module%s failed to load\n", 531 nfail, nfail == 1 ? "" : "s"); 532 #if notyet 533 delay(MODULE_WARNING_DELAY); 534 #endif 535 } 536 } 537 538 int 539 exec_multiboot(const char *file, char *args) 540 { 541 struct multiboot_info *mbi; 542 struct multiboot_module *mbm; 543 struct bi_modulelist_entry *bim; 544 int i, len; 545 u_long marks[MARK_MAX]; 546 u_long extmem; 547 u_long basemem; 548 char *cmdline; 549 550 mbi = alloc(sizeof(struct multiboot_info)); 551 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 552 553 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 554 goto out; 555 556 mbi->mi_mem_upper = extmem; 557 mbi->mi_mem_lower = basemem; 558 559 if (args) { 560 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 561 len = strlen(file) + 1 + strlen(args) + 1; 562 cmdline = alloc(len); 563 snprintf(cmdline, len, "%s %s", file, args); 564 mbi->mi_cmdline = (char *) vtophys(cmdline); 565 } 566 567 /* pull in any modules if necessary */ 568 if (boot_modules_enabled) { 569 module_init(file); 570 if (btinfo_modulelist) { 571 mbm = alloc(sizeof(struct multiboot_module) * 572 btinfo_modulelist->num); 573 574 bim = (struct bi_modulelist_entry *) 575 (((char *) btinfo_modulelist) + 576 sizeof(struct btinfo_modulelist)); 577 for (i = 0; i < btinfo_modulelist->num; i++) { 578 mbm[i].mmo_start = bim->base; 579 mbm[i].mmo_end = bim->base + bim->len; 580 mbm[i].mmo_string = (char *)vtophys(bim->path); 581 mbm[i].mmo_reserved = 0; 582 bim++; 583 } 584 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 585 mbi->mi_mods_count = btinfo_modulelist->num; 586 mbi->mi_mods_addr = vtophys(mbm); 587 } 588 } 589 590 #ifdef DEBUG 591 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 592 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 593 #endif 594 595 596 #if 0 597 if (btinfo_symtab.nsym) { 598 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 599 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 600 btinfo_symtab.nsym = marks[MARK_NSYM]; 601 btinfo_symtab.ssym = marks[MARK_SYM]; 602 btinfo_symtab.esym = marks[MARK_END]; 603 #endif 604 605 multiboot(marks[MARK_ENTRY], vtophys(mbi), 606 x86_trunc_page(mbi->mi_mem_lower*1024)); 607 panic("exec returned"); 608 609 out: 610 dealloc(mbi, 0); 611 return -1; 612 } 613 614 void 615 x86_progress(const char *fmt, ...) 616 { 617 va_list ap; 618 619 if ((howto & AB_SILENT) != 0) 620 return; 621 va_start(ap, fmt); 622 vprintf(fmt, ap); 623 va_end(ap); 624 } 625
Indexes created Mon Sep 22 21:09:42 GMT 2025