exec.c revision 1.28
1/* $NetBSD: exec.c,v 1.28 2008/05/25 11:54:33 chris 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 123extern struct btinfo_console btinfo_console; 124 125boot_module_t *boot_modules; 126bool boot_modules_enabled = true; 127bool kernel_loaded; 128 129static struct btinfo_modulelist *btinfo_modulelist; 130static size_t btinfo_modulelist_size; 131static uint32_t image_end; 132static char module_base[64] = "/"; 133 134static void module_init(void); 135 136int 137exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto) 138{ 139 u_long boot_argv[BOOT_NARGS]; 140 int fd; 141 u_long marks[MARK_MAX]; 142 struct btinfo_symtab btinfo_symtab; 143 u_long extmem; 144 u_long basemem; 145#ifdef XMS 146 u_long xmsmem; 147 physaddr_t origaddr = loadaddr; 148#endif 149 char *machine; 150 151#ifdef DEBUG 152 printf("exec: file=%s loadaddr=0x%lx\n", 153 file ? file : "NULL", loadaddr); 154#endif 155 156 BI_ALLOC(32); /* ??? */ 157 158 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 159 160 extmem = getextmem(); 161 basemem = getbasemem(); 162 163#ifdef XMS 164 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 165 u_long kernsize; 166 167 /* 168 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 169 * getextmem() is getextmem1(). Without, the "smart" 170 * methods could fail to report all memory as well. 171 * xmsmem is a few kB less than the actual size, but 172 * better than nothing. 173 */ 174 if (xmsmem > extmem) 175 extmem = xmsmem; 176 /* 177 * Get the size of the kernel 178 */ 179 marks[MARK_START] = loadaddr; 180 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 181 goto out; 182 close(fd); 183 184 kernsize = marks[MARK_END]; 185 kernsize = (kernsize + 1023) / 1024; 186 187 loadaddr = xmsalloc(kernsize); 188 if (!loadaddr) 189 return ENOMEM; 190 } 191#endif 192 marks[MARK_START] = loadaddr; 193 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 194 goto out; 195 196 boot_argv[0] = boothowto; 197 boot_argv[1] = 0; 198 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 199 /* argv[3] below */ 200 boot_argv[4] = extmem; 201 boot_argv[5] = basemem; 202 203 close(fd); 204 205 /* 206 * Gather some information for the kernel. Do this after the 207 * "point of no return" to avoid memory leaks. 208 * (but before DOS might be trashed in the XMS case) 209 */ 210#ifdef PASS_BIOSGEOM 211 bi_getbiosgeom(); 212#endif 213#ifdef PASS_MEMMAP 214 bi_getmemmap(); 215#endif 216 217#ifdef XMS 218 if (loadaddr != origaddr) { 219 /* 220 * We now have done our last DOS IO, so we may 221 * trash the OS. Copy the data from the temporary 222 * buffer to its real address. 223 */ 224 marks[MARK_START] -= loadaddr; 225 marks[MARK_END] -= loadaddr; 226 marks[MARK_SYM] -= loadaddr; 227 marks[MARK_END] -= loadaddr; 228 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 229 } 230#endif 231 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 232 (-sizeof(int)); 233 boot_argv[3] = marks[MARK_END]; 234 image_end = marks[MARK_END]; 235 kernel_loaded = true; 236 237 /* pull in any modules if necessary */ 238 if (boot_modules_enabled) { 239 switch (netbsd_elf_class) { 240 case ELFCLASS32: 241 machine = "i386"; 242 break; 243 case ELFCLASS64: 244 machine = "amd64"; 245 break; 246 default: 247 machine = "generic"; 248 break; 249 } 250 if (netbsd_version / 1000000 % 100 == 99) { 251 /* -current */ 252 snprintf(module_base, sizeof(module_base), 253 "/stand/%s/%d.%d.%d/modules", machine, 254 netbsd_version / 100000000, 255 netbsd_version / 1000000 % 100, 256 netbsd_version / 100 % 100); 257 } else if (netbsd_version != 0) { 258 /* release */ 259 snprintf(module_base, sizeof(module_base), 260 "/stand/%s/%d.%d/modules", machine, 261 netbsd_version / 100000000, 262 netbsd_version / 1000000 % 100); 263 } 264 module_init(); 265 if (btinfo_modulelist) { 266 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 267 btinfo_modulelist_size); 268 } 269 } 270 271#ifdef DEBUG 272 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 273 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 274#endif 275 276 btinfo_symtab.nsym = marks[MARK_NSYM]; 277 btinfo_symtab.ssym = marks[MARK_SYM]; 278 btinfo_symtab.esym = marks[MARK_END]; 279 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 280 281 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 282 x86_trunc_page(basemem*1024)); 283 panic("exec returned"); 284 285out: 286 BI_FREE(); 287 bootinfo = 0; 288 return -1; 289} 290 291static const char * 292module_path(boot_module_t *bm) 293{ 294 static char buf[256]; 295 const char *name; 296 297 name = bm->bm_path; 298 if (name[0] == '/') 299 return name; 300 snprintf(buf, sizeof(buf), "%s/%s/%s.kmod", module_base, bm->bm_path, 301 bm->bm_path); 302 return buf; 303} 304 305static int 306module_open(boot_module_t *bm, int mode) 307{ 308 int fd; 309 const char *path; 310 311 /* check the expanded path first */ 312 path = module_path(bm); 313 fd = open(path, mode); 314 if (fd == -1) { 315 printf("WARNING: couldn't open %s\n", path); 316 /* now attempt the raw path provided */ 317 fd = open(bm->bm_path, mode); 318 if (fd == -1) 319 printf("WARNING: couldn't open %s\n", bm->bm_path); 320 } 321 return fd; 322} 323 324static void 325module_init(void) 326{ 327 struct bi_modulelist_entry *bi; 328 struct stat st; 329 char *buf; 330 boot_module_t *bm; 331 size_t len; 332 off_t off; 333 int err, fd; 334 335 /* First, see which modules are valid and calculate btinfo size */ 336 len = sizeof(struct btinfo_modulelist); 337 for (bm = boot_modules; bm; bm = bm->bm_next) { 338 fd = module_open(bm, 0); 339 if (fd == -1) { 340 bm->bm_len = -1; 341 continue; 342 } 343 err = fstat(fd, &st); 344 if (err == -1 || st.st_size == -1) { 345 printf("WARNING: couldn't stat %s\n", bm->bm_path); 346 close(fd); 347 bm->bm_len = -1; 348 continue; 349 } 350 bm->bm_len = st.st_size; 351 close(fd); 352 len += sizeof(struct bi_modulelist_entry); 353 } 354 355 /* Allocate the module list */ 356 btinfo_modulelist = alloc(len); 357 if (btinfo_modulelist == NULL) { 358 printf("WARNING: couldn't allocate module list\n"); 359 return; 360 } 361 memset(btinfo_modulelist, 0, len); 362 btinfo_modulelist_size = len; 363 364 /* Fill in btinfo structure */ 365 buf = (char *)btinfo_modulelist; 366 btinfo_modulelist->num = 0; 367 off = sizeof(struct btinfo_modulelist); 368 369 for (bm = boot_modules; bm; bm = bm->bm_next) { 370 if (bm->bm_len == -1) 371 continue; 372 printf("Loading %s ", bm->bm_path); 373 fd = module_open(bm, 0); 374 if (fd == -1) { 375 printf("ERROR: couldn't open %s\n", bm->bm_path); 376 continue; 377 } 378 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 379 len = pread(fd, (void *)image_end, SSIZE_MAX); 380 if (len < bm->bm_len) { 381 printf(" FAILED\n"); 382 } else { 383 btinfo_modulelist->num++; 384 bi = (struct bi_modulelist_entry *)(buf + off); 385 off += sizeof(struct bi_modulelist_entry); 386 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 387 bi->base = image_end; 388 bi->len = len; 389 bi->type = BI_MODULE_ELF; 390 printf(" \n"); 391 } 392 if (len > 0) 393 image_end += len; 394 close(fd); 395 } 396 btinfo_modulelist->endpa = image_end; 397} 398