exec.c revision 1.22.78.2
1 /* $NetBSD: exec.c,v 1.22.78.2 2009/05/04 08:11:19 yamt 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 #ifdef SUPPORT_PS2 118 #include "biosmca.h" 119 #endif 120 121 #define BOOT_NARGS 6 122 123 #ifndef PAGE_SIZE 124 #define PAGE_SIZE 4096 125 #endif 126 127 extern struct btinfo_console btinfo_console; 128 129 boot_module_t *boot_modules; 130 bool boot_modules_enabled = true; 131 bool kernel_loaded; 132 133 static struct btinfo_framebuffer btinfo_framebuffer; 134 135 static struct btinfo_modulelist *btinfo_modulelist; 136 static size_t btinfo_modulelist_size; 137 static uint32_t image_end; 138 static char module_base[64] = "/"; 139 static int howto; 140 141 static void module_init(void); 142 143 void 144 framebuffer_configure(struct btinfo_framebuffer *fb) 145 { 146 if (fb) 147 btinfo_framebuffer = *fb; 148 else { 149 btinfo_framebuffer.physaddr = 0; 150 btinfo_framebuffer.flags = 0; 151 } 152 } 153 154 void 155 module_add(char *name) 156 { 157 boot_module_t *bm, *bmp; 158 size_t len; 159 char *str; 160 161 while (*name == ' ' || *name == '\t') 162 ++name; 163 164 bm = alloc(sizeof(boot_module_t)); 165 len = strlen(name) + 1; 166 str = alloc(len); 167 if (bm == NULL || str == NULL) { 168 printf("couldn't allocate module\n"); 169 return; 170 } 171 memcpy(str, name, len); 172 bm->bm_path = str; 173 bm->bm_next = NULL; 174 if (boot_modules == NULL) 175 boot_modules = bm; 176 else { 177 for (bmp = boot_modules; bmp->bm_next; 178 bmp = bmp->bm_next) 179 ; 180 bmp->bm_next = bm; 181 } 182 } 183 184 static int 185 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 186 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 187 { 188 int fd; 189 #ifdef XMS 190 u_long xmsmem; 191 physaddr_t origaddr = loadaddr; 192 #endif 193 194 *extmem = getextmem(); 195 *basemem = getbasemem(); 196 197 #ifdef XMS 198 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 199 u_long kernsize; 200 201 /* 202 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 203 * getextmem() is getextmem1(). Without, the "smart" 204 * methods could fail to report all memory as well. 205 * xmsmem is a few kB less than the actual size, but 206 * better than nothing. 207 */ 208 if (xmsmem > *extmem) 209 *extmem = xmsmem; 210 /* 211 * Get the size of the kernel 212 */ 213 marks[MARK_START] = loadaddr; 214 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 215 return EIO; 216 close(fd); 217 218 kernsize = marks[MARK_END]; 219 kernsize = (kernsize + 1023) / 1024; 220 221 loadaddr = xmsalloc(kernsize); 222 if (!loadaddr) 223 return ENOMEM; 224 } 225 #endif 226 marks[MARK_START] = loadaddr; 227 if ((fd = loadfile(file, marks, 228 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 229 return EIO; 230 231 close(fd); 232 233 /* Now we know the root fs type, load modules for it. */ 234 module_add(fsmod); 235 if (fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0) 236 module_add(fsmod2); 237 238 /* 239 * Gather some information for the kernel. Do this after the 240 * "point of no return" to avoid memory leaks. 241 * (but before DOS might be trashed in the XMS case) 242 */ 243 #ifdef PASS_BIOSGEOM 244 bi_getbiosgeom(); 245 #endif 246 #ifdef PASS_MEMMAP 247 bi_getmemmap(); 248 #endif 249 250 #ifdef XMS 251 if (loadaddr != origaddr) { 252 /* 253 * We now have done our last DOS IO, so we may 254 * trash the OS. Copy the data from the temporary 255 * buffer to its real address. 256 */ 257 marks[MARK_START] -= loadaddr; 258 marks[MARK_END] -= loadaddr; 259 marks[MARK_SYM] -= loadaddr; 260 marks[MARK_END] -= loadaddr; 261 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 262 } 263 #endif 264 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 265 (-sizeof(int)); 266 image_end = marks[MARK_END]; 267 kernel_loaded = true; 268 269 return 0; 270 } 271 272 int 273 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy, 274 void (*callback)(void)) 275 { 276 u_long boot_argv[BOOT_NARGS]; 277 u_long marks[MARK_MAX]; 278 struct btinfo_symtab btinfo_symtab; 279 u_long extmem; 280 u_long basemem; 281 282 #ifdef DEBUG 283 printf("exec: file=%s loadaddr=0x%lx\n", 284 file ? file : "NULL", loadaddr); 285 #endif 286 287 BI_ALLOC(32); /* ??? */ 288 289 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 290 BI_ADD(&btinfo_framebuffer, BTINFO_FRAMEBUFFER, 291 sizeof(struct btinfo_framebuffer)); 292 293 howto = boothowto; 294 295 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 296 goto out; 297 298 boot_argv[0] = boothowto; 299 boot_argv[1] = 0; 300 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 301 boot_argv[3] = marks[MARK_END]; 302 boot_argv[4] = extmem; 303 boot_argv[5] = basemem; 304 305 /* pull in any modules if necessary */ 306 if (boot_modules_enabled) { 307 module_init(); 308 if (btinfo_modulelist) { 309 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 310 btinfo_modulelist_size); 311 } 312 } 313 314 #ifdef DEBUG 315 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 316 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 317 #endif 318 319 btinfo_symtab.nsym = marks[MARK_NSYM]; 320 btinfo_symtab.ssym = marks[MARK_SYM]; 321 btinfo_symtab.esym = marks[MARK_END]; 322 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 323 324 if (callback != NULL) 325 (*callback)(); 326 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 327 x86_trunc_page(basemem*1024)); 328 panic("exec returned"); 329 330 out: 331 BI_FREE(); 332 bootinfo = 0; 333 return -1; 334 } 335 336 static const char * 337 module_path(boot_module_t *bm) 338 { 339 static char buf[256]; 340 char name_buf[256]; 341 const char *name, *name2; 342 343 name = bm->bm_path; 344 for (name2 = name; *name2; ++name2) { 345 if (*name2 == ' ' || *name2 == '\t') { 346 strlcpy(name_buf, name, sizeof(name_buf)); 347 if (name2 - name < sizeof(name_buf)) 348 name_buf[name2 - name] = '\0'; 349 name = name_buf; 350 break; 351 } 352 } 353 if (name[0] == '/') 354 snprintf(buf, sizeof(buf), "%s", name); 355 else 356 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", 357 module_base, name, name); 358 359 return buf; 360 } 361 362 static int 363 module_open(boot_module_t *bm, int mode) 364 { 365 int fd; 366 const char *path; 367 368 /* check the expanded path first */ 369 path = module_path(bm); 370 fd = open(path, mode); 371 if (fd == -1) { 372 printf("WARNING: couldn't open %s\n", path); 373 /* now attempt the raw path provided */ 374 fd = open(bm->bm_path, mode); 375 if (fd == -1) 376 printf("WARNING: couldn't open %s\n", bm->bm_path); 377 } 378 return fd; 379 } 380 381 static void 382 module_init(void) 383 { 384 struct bi_modulelist_entry *bi; 385 struct stat st; 386 const char *machine; 387 char *buf; 388 boot_module_t *bm; 389 size_t len; 390 off_t off; 391 int err, fd; 392 393 switch (netbsd_elf_class) { 394 case ELFCLASS32: 395 machine = "i386"; 396 break; 397 case ELFCLASS64: 398 machine = "amd64"; 399 break; 400 default: 401 machine = "generic"; 402 break; 403 } 404 if (netbsd_version / 1000000 % 100 == 99) { 405 /* -current */ 406 snprintf(module_base, sizeof(module_base), 407 "/stand/%s/%d.%d.%d/modules", machine, 408 netbsd_version / 100000000, 409 netbsd_version / 1000000 % 100, 410 netbsd_version / 100 % 100); 411 } else if (netbsd_version != 0) { 412 /* release */ 413 snprintf(module_base, sizeof(module_base), 414 "/stand/%s/%d.%d/modules", machine, 415 netbsd_version / 100000000, 416 netbsd_version / 1000000 % 100); 417 } 418 419 /* First, see which modules are valid and calculate btinfo size */ 420 len = sizeof(struct btinfo_modulelist); 421 for (bm = boot_modules; bm; bm = bm->bm_next) { 422 fd = module_open(bm, 0); 423 if (fd == -1) { 424 bm->bm_len = -1; 425 continue; 426 } 427 err = fstat(fd, &st); 428 if (err == -1 || st.st_size == -1) { 429 printf("WARNING: couldn't stat %s\n", bm->bm_path); 430 close(fd); 431 bm->bm_len = -1; 432 continue; 433 } 434 bm->bm_len = st.st_size; 435 close(fd); 436 len += sizeof(struct bi_modulelist_entry); 437 } 438 439 /* Allocate the module list */ 440 btinfo_modulelist = alloc(len); 441 if (btinfo_modulelist == NULL) { 442 printf("WARNING: couldn't allocate module list\n"); 443 return; 444 } 445 memset(btinfo_modulelist, 0, len); 446 btinfo_modulelist_size = len; 447 448 /* Fill in btinfo structure */ 449 buf = (char *)btinfo_modulelist; 450 btinfo_modulelist->num = 0; 451 off = sizeof(struct btinfo_modulelist); 452 453 for (bm = boot_modules; bm; bm = bm->bm_next) { 454 if (bm->bm_len == -1) 455 continue; 456 if ((howto & AB_SILENT) == 0) 457 printf("Loading %s ", bm->bm_path); 458 fd = module_open(bm, 0); 459 if (fd == -1) { 460 printf("ERROR: couldn't open %s\n", bm->bm_path); 461 continue; 462 } 463 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 464 len = pread(fd, (void *)image_end, SSIZE_MAX); 465 if (len < bm->bm_len) { 466 if ((howto & AB_SILENT) != 0) 467 printf("Loading %s ", bm->bm_path); 468 printf(" FAILED\n"); 469 } else { 470 btinfo_modulelist->num++; 471 bi = (struct bi_modulelist_entry *)(buf + off); 472 off += sizeof(struct bi_modulelist_entry); 473 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 474 bi->base = image_end; 475 bi->len = len; 476 bi->type = BI_MODULE_ELF; 477 if ((howto & AB_SILENT) == 0) 478 printf(" \n"); 479 } 480 if (len > 0) 481 image_end += len; 482 close(fd); 483 } 484 btinfo_modulelist->endpa = image_end; 485 } 486 487 int 488 exec_multiboot(const char *file, char *args) 489 { 490 struct multiboot_info *mbi; 491 struct multiboot_module *mbm; 492 struct bi_modulelist_entry *bim; 493 int i, len; 494 u_long marks[MARK_MAX]; 495 u_long extmem; 496 u_long basemem; 497 char *cmdline; 498 499 mbi = alloc(sizeof(struct multiboot_info)); 500 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 501 502 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 503 goto out; 504 505 mbi->mi_mem_upper = extmem; 506 mbi->mi_mem_lower = basemem; 507 508 if (args) { 509 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 510 len = strlen(file) + 1 + strlen(args) + 1; 511 cmdline = alloc(len); 512 snprintf(cmdline, len, "%s %s", file, args); 513 mbi->mi_cmdline = (char *) vtophys(cmdline); 514 } 515 516 /* pull in any modules if necessary */ 517 if (boot_modules_enabled) { 518 module_init(); 519 if (btinfo_modulelist) { 520 mbm = alloc(sizeof(struct multiboot_module) * 521 btinfo_modulelist->num); 522 523 bim = (struct bi_modulelist_entry *) 524 (((char *) btinfo_modulelist) + 525 sizeof(struct btinfo_modulelist)); 526 for (i = 0; i < btinfo_modulelist->num; i++) { 527 mbm[i].mmo_start = bim->base; 528 mbm[i].mmo_end = bim->base + bim->len; 529 mbm[i].mmo_string = (char *)vtophys(bim->path); 530 mbm[i].mmo_reserved = 0; 531 bim++; 532 } 533 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 534 mbi->mi_mods_count = btinfo_modulelist->num; 535 mbi->mi_mods_addr = vtophys(mbm); 536 } 537 } 538 539 #ifdef DEBUG 540 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 541 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 542 #endif 543 544 545 #if 0 546 if (btinfo_symtab.nsym) { 547 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 548 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 549 btinfo_symtab.nsym = marks[MARK_NSYM]; 550 btinfo_symtab.ssym = marks[MARK_SYM]; 551 btinfo_symtab.esym = marks[MARK_END]; 552 #endif 553 554 multiboot(marks[MARK_ENTRY], vtophys(mbi), 555 x86_trunc_page(mbi->mi_mem_lower*1024)); 556 panic("exec returned"); 557 558 out: 559 dealloc(mbi, 0); 560 return -1; 561 } 562 563 void 564 x86_progress(const char *fmt, ...) 565 { 566 va_list ap; 567 568 if ((howto & AB_SILENT) != 0) 569 return; 570 va_start(ap, fmt); 571 vprintf(fmt, ap); 572 va_end(ap); 573 } 574
Indexes created Thu Oct 02 14:10:14 GMT 2025