exec.c revision 1.39
1 /* $NetBSD: exec.c,v 1.39 2009/02/16 22:39:30 jmcneill 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_framebuffer btinfo_framebuffer; 132 133 static struct btinfo_modulelist *btinfo_modulelist; 134 static size_t btinfo_modulelist_size; 135 static uint32_t image_end; 136 static char module_base[64] = "/"; 137 138 static void module_init(void); 139 140 void 141 framebuffer_configure(struct btinfo_framebuffer *fb) 142 { 143 if (fb) 144 btinfo_framebuffer = *fb; 145 else { 146 btinfo_framebuffer.physaddr = 0; 147 btinfo_framebuffer.flags = 0; 148 } 149 } 150 151 void 152 module_add(char *name) 153 { 154 boot_module_t *bm, *bmp; 155 size_t len; 156 char *str; 157 158 while (*name == ' ' || *name == '\t') 159 ++name; 160 161 bm = alloc(sizeof(boot_module_t)); 162 len = strlen(name) + 1; 163 str = alloc(len); 164 if (bm == NULL || str == NULL) { 165 printf("couldn't allocate module\n"); 166 return; 167 } 168 memcpy(str, name, len); 169 bm->bm_path = str; 170 bm->bm_next = NULL; 171 if (boot_modules == NULL) 172 boot_modules = bm; 173 else { 174 for (bmp = boot_modules; bmp->bm_next; 175 bmp = bmp->bm_next) 176 ; 177 bmp->bm_next = bm; 178 } 179 } 180 181 static int 182 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 183 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 184 { 185 int fd; 186 #ifdef XMS 187 u_long xmsmem; 188 physaddr_t origaddr = loadaddr; 189 #endif 190 191 *extmem = getextmem(); 192 *basemem = getbasemem(); 193 194 #ifdef XMS 195 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 196 u_long kernsize; 197 198 /* 199 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 200 * getextmem() is getextmem1(). Without, the "smart" 201 * methods could fail to report all memory as well. 202 * xmsmem is a few kB less than the actual size, but 203 * better than nothing. 204 */ 205 if (xmsmem > *extmem) 206 *extmem = xmsmem; 207 /* 208 * Get the size of the kernel 209 */ 210 marks[MARK_START] = loadaddr; 211 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 212 return EIO; 213 close(fd); 214 215 kernsize = marks[MARK_END]; 216 kernsize = (kernsize + 1023) / 1024; 217 218 loadaddr = xmsalloc(kernsize); 219 if (!loadaddr) 220 return ENOMEM; 221 } 222 #endif 223 marks[MARK_START] = loadaddr; 224 if ((fd = loadfile(file, marks, 225 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 226 return EIO; 227 228 close(fd); 229 230 /* Now we know the root fs type, load modules for it. */ 231 module_add(fsmod); 232 if (fsmod2 != NULL && strcmp(fsmod, fsmod2) != 0) 233 module_add(fsmod2); 234 235 /* 236 * Gather some information for the kernel. Do this after the 237 * "point of no return" to avoid memory leaks. 238 * (but before DOS might be trashed in the XMS case) 239 */ 240 #ifdef PASS_BIOSGEOM 241 bi_getbiosgeom(); 242 #endif 243 #ifdef PASS_MEMMAP 244 bi_getmemmap(); 245 #endif 246 247 #ifdef XMS 248 if (loadaddr != origaddr) { 249 /* 250 * We now have done our last DOS IO, so we may 251 * trash the OS. Copy the data from the temporary 252 * buffer to its real address. 253 */ 254 marks[MARK_START] -= loadaddr; 255 marks[MARK_END] -= loadaddr; 256 marks[MARK_SYM] -= loadaddr; 257 marks[MARK_END] -= loadaddr; 258 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 259 } 260 #endif 261 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 262 (-sizeof(int)); 263 image_end = marks[MARK_END]; 264 kernel_loaded = true; 265 266 return 0; 267 } 268 269 int 270 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy) 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 BI_ADD(&btinfo_framebuffer, BTINFO_FRAMEBUFFER, 287 sizeof(struct btinfo_framebuffer)); 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(); 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 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 319 x86_trunc_page(basemem*1024)); 320 panic("exec returned"); 321 322 out: 323 BI_FREE(); 324 bootinfo = 0; 325 return -1; 326 } 327 328 static const char * 329 module_path(boot_module_t *bm) 330 { 331 static char buf[256]; 332 char name_buf[256]; 333 const char *name, *name2; 334 335 name = bm->bm_path; 336 for (name2 = name; *name2; ++name2) { 337 if (*name2 == ' ' || *name2 == '\t') { 338 strlcpy(name_buf, name, sizeof(name_buf)); 339 if (name2 - name < sizeof(name_buf)) 340 name_buf[name2 - name] = '\0'; 341 name = name_buf; 342 break; 343 } 344 } 345 if (name[0] == '/') 346 snprintf(buf, sizeof(buf), "%s", name); 347 else 348 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", 349 module_base, name, name); 350 351 return buf; 352 } 353 354 static int 355 module_open(boot_module_t *bm, int mode) 356 { 357 int fd; 358 const char *path; 359 360 /* check the expanded path first */ 361 path = module_path(bm); 362 fd = open(path, mode); 363 if (fd == -1) { 364 printf("WARNING: couldn't open %s\n", path); 365 /* now attempt the raw path provided */ 366 fd = open(bm->bm_path, mode); 367 if (fd == -1) 368 printf("WARNING: couldn't open %s\n", bm->bm_path); 369 } 370 return fd; 371 } 372 373 static void 374 module_init(void) 375 { 376 struct bi_modulelist_entry *bi; 377 struct stat st; 378 const char *machine; 379 char *buf; 380 boot_module_t *bm; 381 size_t len; 382 off_t off; 383 int err, fd; 384 385 switch (netbsd_elf_class) { 386 case ELFCLASS32: 387 machine = "i386"; 388 break; 389 case ELFCLASS64: 390 machine = "amd64"; 391 break; 392 default: 393 machine = "generic"; 394 break; 395 } 396 if (netbsd_version / 1000000 % 100 == 99) { 397 /* -current */ 398 snprintf(module_base, sizeof(module_base), 399 "/stand/%s/%d.%d.%d/modules", machine, 400 netbsd_version / 100000000, 401 netbsd_version / 1000000 % 100, 402 netbsd_version / 100 % 100); 403 } else if (netbsd_version != 0) { 404 /* release */ 405 snprintf(module_base, sizeof(module_base), 406 "/stand/%s/%d.%d/modules", machine, 407 netbsd_version / 100000000, 408 netbsd_version / 1000000 % 100); 409 } 410 411 /* First, see which modules are valid and calculate btinfo size */ 412 len = sizeof(struct btinfo_modulelist); 413 for (bm = boot_modules; bm; bm = bm->bm_next) { 414 fd = module_open(bm, 0); 415 if (fd == -1) { 416 bm->bm_len = -1; 417 continue; 418 } 419 err = fstat(fd, &st); 420 if (err == -1 || st.st_size == -1) { 421 printf("WARNING: couldn't stat %s\n", bm->bm_path); 422 close(fd); 423 bm->bm_len = -1; 424 continue; 425 } 426 bm->bm_len = st.st_size; 427 close(fd); 428 len += sizeof(struct bi_modulelist_entry); 429 } 430 431 /* Allocate the module list */ 432 btinfo_modulelist = alloc(len); 433 if (btinfo_modulelist == NULL) { 434 printf("WARNING: couldn't allocate module list\n"); 435 return; 436 } 437 memset(btinfo_modulelist, 0, len); 438 btinfo_modulelist_size = len; 439 440 /* Fill in btinfo structure */ 441 buf = (char *)btinfo_modulelist; 442 btinfo_modulelist->num = 0; 443 off = sizeof(struct btinfo_modulelist); 444 445 for (bm = boot_modules; bm; bm = bm->bm_next) { 446 if (bm->bm_len == -1) 447 continue; 448 printf("Loading %s ", bm->bm_path); 449 fd = module_open(bm, 0); 450 if (fd == -1) { 451 printf("ERROR: couldn't open %s\n", bm->bm_path); 452 continue; 453 } 454 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 455 len = pread(fd, (void *)image_end, SSIZE_MAX); 456 if (len < bm->bm_len) { 457 printf(" FAILED\n"); 458 } else { 459 btinfo_modulelist->num++; 460 bi = (struct bi_modulelist_entry *)(buf + off); 461 off += sizeof(struct bi_modulelist_entry); 462 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 463 bi->base = image_end; 464 bi->len = len; 465 bi->type = BI_MODULE_ELF; 466 printf(" \n"); 467 } 468 if (len > 0) 469 image_end += len; 470 close(fd); 471 } 472 btinfo_modulelist->endpa = image_end; 473 } 474 475 int 476 exec_multiboot(const char *file, char *args) 477 { 478 struct multiboot_info *mbi; 479 struct multiboot_module *mbm; 480 struct bi_modulelist_entry *bim; 481 int i, len; 482 u_long marks[MARK_MAX]; 483 u_long extmem; 484 u_long basemem; 485 char *cmdline; 486 487 mbi = alloc(sizeof(struct multiboot_info)); 488 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 489 490 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 491 goto out; 492 493 mbi->mi_mem_upper = extmem; 494 mbi->mi_mem_lower = basemem; 495 496 if (args) { 497 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 498 len = strlen(file) + 1 + strlen(args) + 1; 499 cmdline = alloc(len); 500 snprintf(cmdline, len, "%s %s", file, args); 501 mbi->mi_cmdline = (char *) vtophys(cmdline); 502 } 503 504 /* pull in any modules if necessary */ 505 if (boot_modules_enabled) { 506 module_init(); 507 if (btinfo_modulelist) { 508 mbm = alloc(sizeof(struct multiboot_module) * 509 btinfo_modulelist->num); 510 511 bim = (struct bi_modulelist_entry *) 512 (((char *) btinfo_modulelist) + 513 sizeof(struct btinfo_modulelist)); 514 for (i = 0; i < btinfo_modulelist->num; i++) { 515 mbm[i].mmo_start = bim->base; 516 mbm[i].mmo_end = bim->base + bim->len; 517 mbm[i].mmo_string = (char *)vtophys(bim->path); 518 mbm[i].mmo_reserved = 0; 519 bim++; 520 } 521 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 522 mbi->mi_mods_count = btinfo_modulelist->num; 523 mbi->mi_mods_addr = vtophys(mbm); 524 } 525 } 526 527 #ifdef DEBUG 528 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 529 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 530 #endif 531 532 533 #if 0 534 if (btinfo_symtab.nsym) { 535 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 536 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 537 btinfo_symtab.nsym = marks[MARK_NSYM]; 538 btinfo_symtab.ssym = marks[MARK_SYM]; 539 btinfo_symtab.esym = marks[MARK_END]; 540 #endif 541 542 multiboot(marks[MARK_ENTRY], vtophys(mbi), 543 x86_trunc_page(mbi->mi_mem_lower*1024)); 544 panic("exec returned"); 545 546 out: 547 dealloc(mbi, 0); 548 return -1; 549 } 550
Indexes created Mon Sep 22 13:09:51 GMT 2025