exec.c revision 1.33
1 /* $NetBSD: exec.c,v 1.33 2008/10/11 11:06:20 joerg 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_modulelist *btinfo_modulelist; 132 static size_t btinfo_modulelist_size; 133 static uint32_t image_end; 134 static char module_base[64] = "/"; 135 136 static void module_init(void); 137 138 static int 139 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 140 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 141 { 142 int fd; 143 #ifdef XMS 144 u_long xmsmem; 145 physaddr_t origaddr = loadaddr; 146 #endif 147 148 *extmem = getextmem(); 149 *basemem = getbasemem(); 150 151 #ifdef XMS 152 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 153 u_long kernsize; 154 155 /* 156 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 157 * getextmem() is getextmem1(). Without, the "smart" 158 * methods could fail to report all memory as well. 159 * xmsmem is a few kB less than the actual size, but 160 * better than nothing. 161 */ 162 if (xmsmem > *extmem) 163 *extmem = xmsmem; 164 /* 165 * Get the size of the kernel 166 */ 167 marks[MARK_START] = loadaddr; 168 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 169 return EIO; 170 close(fd); 171 172 kernsize = marks[MARK_END]; 173 kernsize = (kernsize + 1023) / 1024; 174 175 loadaddr = xmsalloc(kernsize); 176 if (!loadaddr) 177 return ENOMEM; 178 } 179 #endif 180 marks[MARK_START] = loadaddr; 181 if ((fd = loadfile(file, marks, 182 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 183 return EIO; 184 185 close(fd); 186 187 /* 188 * Gather some information for the kernel. Do this after the 189 * "point of no return" to avoid memory leaks. 190 * (but before DOS might be trashed in the XMS case) 191 */ 192 #ifdef PASS_BIOSGEOM 193 bi_getbiosgeom(); 194 #endif 195 #ifdef PASS_MEMMAP 196 bi_getmemmap(); 197 #endif 198 199 #ifdef XMS 200 if (loadaddr != origaddr) { 201 /* 202 * We now have done our last DOS IO, so we may 203 * trash the OS. Copy the data from the temporary 204 * buffer to its real address. 205 */ 206 marks[MARK_START] -= loadaddr; 207 marks[MARK_END] -= loadaddr; 208 marks[MARK_SYM] -= loadaddr; 209 marks[MARK_END] -= loadaddr; 210 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 211 } 212 #endif 213 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 214 (-sizeof(int)); 215 image_end = marks[MARK_END]; 216 kernel_loaded = true; 217 218 return 0; 219 } 220 221 int 222 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy) 223 { 224 u_long boot_argv[BOOT_NARGS]; 225 u_long marks[MARK_MAX]; 226 struct btinfo_symtab btinfo_symtab; 227 u_long extmem; 228 u_long basemem; 229 230 #ifdef DEBUG 231 printf("exec: file=%s loadaddr=0x%lx\n", 232 file ? file : "NULL", loadaddr); 233 #endif 234 235 BI_ALLOC(32); /* ??? */ 236 237 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 238 239 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 240 goto out; 241 242 boot_argv[0] = boothowto; 243 boot_argv[1] = 0; 244 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 245 boot_argv[3] = marks[MARK_END]; 246 boot_argv[4] = extmem; 247 boot_argv[5] = basemem; 248 249 /* pull in any modules if necessary */ 250 if (boot_modules_enabled) { 251 module_init(); 252 if (btinfo_modulelist) { 253 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 254 btinfo_modulelist_size); 255 } 256 } 257 258 #ifdef DEBUG 259 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 260 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 261 #endif 262 263 btinfo_symtab.nsym = marks[MARK_NSYM]; 264 btinfo_symtab.ssym = marks[MARK_SYM]; 265 btinfo_symtab.esym = marks[MARK_END]; 266 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 267 268 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 269 x86_trunc_page(basemem*1024)); 270 panic("exec returned"); 271 272 out: 273 BI_FREE(); 274 bootinfo = 0; 275 return -1; 276 } 277 278 static const char * 279 module_path(boot_module_t *bm) 280 { 281 static char buf[256]; 282 char name_buf[256]; 283 const char *name, *name2; 284 285 name = bm->bm_path; 286 for (name2 = name; *name2; ++name2) { 287 if (*name2 == ' ' || *name2 == '\t') { 288 strlcpy(name_buf, name, sizeof(name_buf)); 289 if (name2 - name < sizeof(name_buf)) 290 name_buf[name2 - name] = '\0'; 291 name = name_buf; 292 break; 293 } 294 } 295 if (name[0] == '/') 296 snprintf(buf, sizeof(buf), "%s", name); 297 else 298 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", 299 module_base, name, name); 300 301 return buf; 302 } 303 304 static int 305 module_open(boot_module_t *bm, int mode) 306 { 307 int fd; 308 const char *path; 309 310 /* check the expanded path first */ 311 path = module_path(bm); 312 fd = open(path, mode); 313 if (fd == -1) { 314 printf("WARNING: couldn't open %s\n", path); 315 /* now attempt the raw path provided */ 316 fd = open(bm->bm_path, mode); 317 if (fd == -1) 318 printf("WARNING: couldn't open %s\n", bm->bm_path); 319 } 320 return fd; 321 } 322 323 static void 324 module_init(void) 325 { 326 struct bi_modulelist_entry *bi; 327 struct stat st; 328 const char *machine; 329 char *buf; 330 boot_module_t *bm; 331 size_t len; 332 off_t off; 333 int err, fd; 334 335 switch (netbsd_elf_class) { 336 case ELFCLASS32: 337 machine = "i386"; 338 break; 339 case ELFCLASS64: 340 machine = "amd64"; 341 break; 342 default: 343 machine = "generic"; 344 break; 345 } 346 if (netbsd_version / 1000000 % 100 == 99) { 347 /* -current */ 348 snprintf(module_base, sizeof(module_base), 349 "/stand/%s/%d.%d.%d/modules", machine, 350 netbsd_version / 100000000, 351 netbsd_version / 1000000 % 100, 352 netbsd_version / 100 % 100); 353 } else if (netbsd_version != 0) { 354 /* release */ 355 snprintf(module_base, sizeof(module_base), 356 "/stand/%s/%d.%d/modules", machine, 357 netbsd_version / 100000000, 358 netbsd_version / 1000000 % 100); 359 } 360 361 /* First, see which modules are valid and calculate btinfo size */ 362 len = sizeof(struct btinfo_modulelist); 363 for (bm = boot_modules; bm; bm = bm->bm_next) { 364 fd = module_open(bm, 0); 365 if (fd == -1) { 366 bm->bm_len = -1; 367 continue; 368 } 369 err = fstat(fd, &st); 370 if (err == -1 || st.st_size == -1) { 371 printf("WARNING: couldn't stat %s\n", bm->bm_path); 372 close(fd); 373 bm->bm_len = -1; 374 continue; 375 } 376 bm->bm_len = st.st_size; 377 close(fd); 378 len += sizeof(struct bi_modulelist_entry); 379 } 380 381 /* Allocate the module list */ 382 btinfo_modulelist = alloc(len); 383 if (btinfo_modulelist == NULL) { 384 printf("WARNING: couldn't allocate module list\n"); 385 return; 386 } 387 memset(btinfo_modulelist, 0, len); 388 btinfo_modulelist_size = len; 389 390 /* Fill in btinfo structure */ 391 buf = (char *)btinfo_modulelist; 392 btinfo_modulelist->num = 0; 393 off = sizeof(struct btinfo_modulelist); 394 395 for (bm = boot_modules; bm; bm = bm->bm_next) { 396 if (bm->bm_len == -1) 397 continue; 398 printf("Loading %s ", bm->bm_path); 399 fd = module_open(bm, 0); 400 if (fd == -1) { 401 printf("ERROR: couldn't open %s\n", bm->bm_path); 402 continue; 403 } 404 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 405 len = pread(fd, (void *)image_end, SSIZE_MAX); 406 if (len < bm->bm_len) { 407 printf(" FAILED\n"); 408 } else { 409 btinfo_modulelist->num++; 410 bi = (struct bi_modulelist_entry *)(buf + off); 411 off += sizeof(struct bi_modulelist_entry); 412 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 413 bi->base = image_end; 414 bi->len = len; 415 bi->type = BI_MODULE_ELF; 416 printf(" \n"); 417 } 418 if (len > 0) 419 image_end += len; 420 close(fd); 421 } 422 btinfo_modulelist->endpa = image_end; 423 } 424 425 int 426 exec_multiboot(const char *file, char *args) 427 { 428 struct multiboot_info *mbi; 429 struct multiboot_module *mbm; 430 struct bi_modulelist_entry *bim; 431 int i, len; 432 u_long marks[MARK_MAX]; 433 u_long extmem; 434 u_long basemem; 435 char *cmdline; 436 437 mbi = alloc(sizeof(struct multiboot_info)); 438 mbi->mi_flags = MULTIBOOT_INFO_HAS_MEMORY; 439 440 if (common_load_kernel(file, &basemem, &extmem, 0, 0, marks)) 441 goto out; 442 443 mbi->mi_mem_upper = extmem; 444 mbi->mi_mem_lower = basemem; 445 446 if (args) { 447 mbi->mi_flags |= MULTIBOOT_INFO_HAS_CMDLINE; 448 len = strlen(file) + 1 + strlen(args) + 1; 449 cmdline = alloc(len); 450 snprintf(cmdline, len, "%s %s", file, args); 451 mbi->mi_cmdline = (char *) vtophys(cmdline); 452 } 453 454 /* pull in any modules if necessary */ 455 if (boot_modules_enabled) { 456 module_init(); 457 if (btinfo_modulelist) { 458 mbm = alloc(sizeof(struct multiboot_module) * 459 btinfo_modulelist->num); 460 461 bim = (struct bi_modulelist_entry *) 462 (((char *) btinfo_modulelist) + 463 sizeof(struct btinfo_modulelist)); 464 for (i = 0; i < btinfo_modulelist->num; i++) { 465 mbm[i].mmo_start = bim->base; 466 mbm[i].mmo_end = bim->base + bim->len; 467 mbm[i].mmo_string = (char *)vtophys(bim->path); 468 mbm[i].mmo_reserved = 0; 469 bim++; 470 } 471 mbi->mi_flags |= MULTIBOOT_INFO_HAS_MODS; 472 mbi->mi_mods_count = btinfo_modulelist->num; 473 mbi->mi_mods_addr = vtophys(mbm); 474 } 475 } 476 477 #ifdef DEBUG 478 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 479 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 480 #endif 481 482 483 #if 0 484 if (btinfo_symtab.nsym) { 485 mbi->mi_flags |= MULTIBOOT_INFO_HAS_ELF_SYMS; 486 mbi->mi_elfshdr_addr = marks[MARK_SYM]; 487 btinfo_symtab.nsym = marks[MARK_NSYM]; 488 btinfo_symtab.ssym = marks[MARK_SYM]; 489 btinfo_symtab.esym = marks[MARK_END]; 490 #endif 491 492 multiboot(marks[MARK_ENTRY], vtophys(mbi), 493 x86_trunc_page(mbi->mi_mem_lower*1024)); 494 panic("exec returned"); 495 496 out: 497 dealloc(mbi, 0); 498 return -1; 499 } 500
Indexes created Mon Sep 22 13:09:51 GMT 2025