exec.c revision 1.25.2.2
1 /* $NetBSD: exec.c,v 1.25.2.2 2008/10/10 22:29:05 skrll 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 <lib/libsa/stand.h> 107 #include <lib/libkern/libkern.h> 108 109 #include "loadfile.h" 110 #include "libi386.h" 111 #include "bootinfo.h" 112 #include "bootmod.h" 113 #ifdef SUPPORT_PS2 114 #include "biosmca.h" 115 #endif 116 117 #define BOOT_NARGS 6 118 119 #ifndef PAGE_SIZE 120 #define PAGE_SIZE 4096 121 #endif 122 123 extern struct btinfo_console btinfo_console; 124 125 boot_module_t *boot_modules; 126 bool boot_modules_enabled = true; 127 bool kernel_loaded; 128 129 static struct btinfo_modulelist *btinfo_modulelist; 130 static size_t btinfo_modulelist_size; 131 static uint32_t image_end; 132 static char module_base[64] = "/"; 133 134 static void module_init(void); 135 136 static int 137 common_load_kernel(const char *file, u_long *basemem, u_long *extmem, 138 physaddr_t loadaddr, int floppy, u_long marks[MARK_MAX]) 139 { 140 int fd; 141 #ifdef XMS 142 u_long xmsmem; 143 physaddr_t origaddr = loadaddr; 144 #endif 145 146 *extmem = getextmem(); 147 *basemem = getbasemem(); 148 149 #ifdef XMS 150 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 151 u_long kernsize; 152 153 /* 154 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 155 * getextmem() is getextmem1(). Without, the "smart" 156 * methods could fail to report all memory as well. 157 * xmsmem is a few kB less than the actual size, but 158 * better than nothing. 159 */ 160 if (xmsmem > *extmem) 161 *extmem = xmsmem; 162 /* 163 * Get the size of the kernel 164 */ 165 marks[MARK_START] = loadaddr; 166 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 167 return EIO; 168 close(fd); 169 170 kernsize = marks[MARK_END]; 171 kernsize = (kernsize + 1023) / 1024; 172 173 loadaddr = xmsalloc(kernsize); 174 if (!loadaddr) 175 return ENOMEM; 176 } 177 #endif 178 marks[MARK_START] = loadaddr; 179 if ((fd = loadfile(file, marks, 180 LOAD_KERNEL & ~(floppy ? LOAD_NOTE : 0))) == -1) 181 return EIO; 182 183 close(fd); 184 185 /* 186 * Gather some information for the kernel. Do this after the 187 * "point of no return" to avoid memory leaks. 188 * (but before DOS might be trashed in the XMS case) 189 */ 190 #ifdef PASS_BIOSGEOM 191 bi_getbiosgeom(); 192 #endif 193 #ifdef PASS_MEMMAP 194 bi_getmemmap(); 195 #endif 196 197 #ifdef XMS 198 if (loadaddr != origaddr) { 199 /* 200 * We now have done our last DOS IO, so we may 201 * trash the OS. Copy the data from the temporary 202 * buffer to its real address. 203 */ 204 marks[MARK_START] -= loadaddr; 205 marks[MARK_END] -= loadaddr; 206 marks[MARK_SYM] -= loadaddr; 207 marks[MARK_END] -= loadaddr; 208 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 209 } 210 #endif 211 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 212 (-sizeof(int)); 213 image_end = marks[MARK_END]; 214 kernel_loaded = true; 215 216 return 0; 217 } 218 219 int 220 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto, int floppy) 221 { 222 u_long boot_argv[BOOT_NARGS]; 223 u_long marks[MARK_MAX]; 224 struct btinfo_symtab btinfo_symtab; 225 u_long extmem; 226 u_long basemem; 227 228 #ifdef DEBUG 229 printf("exec: file=%s loadaddr=0x%lx\n", 230 file ? file : "NULL", loadaddr); 231 #endif 232 233 BI_ALLOC(32); /* ??? */ 234 235 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 236 237 if (common_load_kernel(file, &basemem, &extmem, loadaddr, floppy, marks)) 238 goto out; 239 240 boot_argv[0] = boothowto; 241 boot_argv[1] = 0; 242 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 243 boot_argv[3] = marks[MARK_END]; 244 boot_argv[4] = extmem; 245 boot_argv[5] = basemem; 246 247 /* pull in any modules if necessary */ 248 if (boot_modules_enabled) { 249 module_init(); 250 if (btinfo_modulelist) { 251 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 252 btinfo_modulelist_size); 253 } 254 } 255 256 #ifdef DEBUG 257 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 258 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 259 #endif 260 261 btinfo_symtab.nsym = marks[MARK_NSYM]; 262 btinfo_symtab.ssym = marks[MARK_SYM]; 263 btinfo_symtab.esym = marks[MARK_END]; 264 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 265 266 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 267 x86_trunc_page(basemem*1024)); 268 panic("exec returned"); 269 270 out: 271 BI_FREE(); 272 bootinfo = 0; 273 return -1; 274 } 275 276 static const char * 277 module_path(boot_module_t *bm) 278 { 279 static char buf[256]; 280 const char *name; 281 282 name = bm->bm_path; 283 if (name[0] == '/') 284 return name; 285 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", module_base, bm->bm_path, 286 bm->bm_path); 287 return buf; 288 } 289 290 static int 291 module_open(boot_module_t *bm, int mode) 292 { 293 int fd; 294 const char *path; 295 296 /* check the expanded path first */ 297 path = module_path(bm); 298 fd = open(path, mode); 299 if (fd == -1) { 300 printf("WARNING: couldn't open %s\n", path); 301 /* now attempt the raw path provided */ 302 fd = open(bm->bm_path, mode); 303 if (fd == -1) 304 printf("WARNING: couldn't open %s\n", bm->bm_path); 305 } 306 return fd; 307 } 308 309 static void 310 module_init(void) 311 { 312 struct bi_modulelist_entry *bi; 313 struct stat st; 314 const char *machine; 315 char *buf; 316 boot_module_t *bm; 317 size_t len; 318 off_t off; 319 int err, fd; 320 321 switch (netbsd_elf_class) { 322 case ELFCLASS32: 323 machine = "i386"; 324 break; 325 case ELFCLASS64: 326 machine = "amd64"; 327 break; 328 default: 329 machine = "generic"; 330 break; 331 } 332 if (netbsd_version / 1000000 % 100 == 99) { 333 /* -current */ 334 snprintf(module_base, sizeof(module_base), 335 "/stand/%s/%d.%d.%d/modules", machine, 336 netbsd_version / 100000000, 337 netbsd_version / 1000000 % 100, 338 netbsd_version / 100 % 100); 339 } else if (netbsd_version != 0) { 340 /* release */ 341 snprintf(module_base, sizeof(module_base), 342 "/stand/%s/%d.%d/modules", machine, 343 netbsd_version / 100000000, 344 netbsd_version / 1000000 % 100); 345 } 346 347 /* First, see which modules are valid and calculate btinfo size */ 348 len = sizeof(struct btinfo_modulelist); 349 for (bm = boot_modules; bm; bm = bm->bm_next) { 350 fd = module_open(bm, 0); 351 if (fd == -1) { 352 bm->bm_len = -1; 353 continue; 354 } 355 err = fstat(fd, &st); 356 if (err == -1 || st.st_size == -1) { 357 printf("WARNING: couldn't stat %s\n", bm->bm_path); 358 close(fd); 359 bm->bm_len = -1; 360 continue; 361 } 362 bm->bm_len = st.st_size; 363 close(fd); 364 len += sizeof(struct bi_modulelist_entry); 365 } 366 367 /* Allocate the module list */ 368 btinfo_modulelist = alloc(len); 369 if (btinfo_modulelist == NULL) { 370 printf("WARNING: couldn't allocate module list\n"); 371 return; 372 } 373 memset(btinfo_modulelist, 0, len); 374 btinfo_modulelist_size = len; 375 376 /* Fill in btinfo structure */ 377 buf = (char *)btinfo_modulelist; 378 btinfo_modulelist->num = 0; 379 off = sizeof(struct btinfo_modulelist); 380 381 for (bm = boot_modules; bm; bm = bm->bm_next) { 382 if (bm->bm_len == -1) 383 continue; 384 printf("Loading %s ", bm->bm_path); 385 fd = module_open(bm, 0); 386 if (fd == -1) { 387 printf("ERROR: couldn't open %s\n", bm->bm_path); 388 continue; 389 } 390 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 391 len = pread(fd, (void *)image_end, SSIZE_MAX); 392 if (len < bm->bm_len) { 393 printf(" FAILED\n"); 394 } else { 395 btinfo_modulelist->num++; 396 bi = (struct bi_modulelist_entry *)(buf + off); 397 off += sizeof(struct bi_modulelist_entry); 398 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 399 bi->base = image_end; 400 bi->len = len; 401 bi->type = BI_MODULE_ELF; 402 printf(" \n"); 403 } 404 if (len > 0) 405 image_end += len; 406 close(fd); 407 } 408 btinfo_modulelist->endpa = image_end; 409 } 410
Indexes created Thu Oct 02 14:10:14 GMT 2025