exec.c revision 1.24
1 /* $NetBSD: exec.c,v 1.24 2008/05/03 18:49:13 ad 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 * Copyright (c) 1997 66 * Martin Husemann. All rights reserved. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. All advertising materials mentioning features or use of this software 77 * must display the following acknowledgement: 78 * This product includes software developed by the University of 79 * California, Berkeley and its contributors. 80 * 4. Neither the name of the University nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 * 96 * @(#)boot.c 8.1 (Berkeley) 6/10/93 97 */ 98 99 /* 100 * starts NetBSD a.out kernel 101 * needs lowlevel startup from startprog.S 102 * This is a special version of exec.c to support use of XMS. 103 */ 104 105 #include <sys/param.h> 106 #include <sys/reboot.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; 134 135 static void module_init(void); 136 137 int 138 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto) 139 { 140 u_long boot_argv[BOOT_NARGS]; 141 int fd; 142 u_long marks[MARK_MAX]; 143 struct btinfo_symtab btinfo_symtab; 144 u_long extmem; 145 u_long basemem; 146 #ifdef XMS 147 u_long xmsmem; 148 physaddr_t origaddr = loadaddr; 149 #endif 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 module_init(); 240 if (btinfo_modulelist) { 241 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 242 btinfo_modulelist_size); 243 } 244 } 245 246 #ifdef DEBUG 247 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 248 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 249 #endif 250 251 btinfo_symtab.nsym = marks[MARK_NSYM]; 252 btinfo_symtab.ssym = marks[MARK_SYM]; 253 btinfo_symtab.esym = marks[MARK_END]; 254 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 255 256 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 257 x86_trunc_page(basemem*1024)); 258 panic("exec returned"); 259 260 out: 261 BI_FREE(); 262 bootinfo = 0; 263 return -1; 264 } 265 266 static void 267 module_init(void) 268 { 269 struct bi_modulelist_entry *bi; 270 struct stat st; 271 char *buf; 272 boot_module_t *bm; 273 size_t len; 274 off_t off; 275 int err, fd; 276 277 /* First, see which modules are valid and calculate btinfo size */ 278 len = sizeof(struct btinfo_modulelist); 279 for (bm = boot_modules; bm; bm = bm->bm_next) { 280 fd = open(bm->bm_path, 0); 281 if (fd == -1) { 282 printf("WARNING: couldn't open %s\n", bm->bm_path); 283 bm->bm_len = -1; 284 continue; 285 } 286 err = fstat(fd, &st); 287 if (err == -1 || st.st_size == -1) { 288 printf("WARNING: couldn't stat %s\n", bm->bm_path); 289 close(fd); 290 bm->bm_len = -1; 291 continue; 292 } 293 bm->bm_len = st.st_size; 294 close(fd); 295 len += sizeof(struct bi_modulelist_entry); 296 } 297 298 /* Allocate the module list */ 299 btinfo_modulelist = alloc(len); 300 if (btinfo_modulelist == NULL) { 301 printf("WARNING: couldn't allocate module list\n"); 302 return; 303 } 304 memset(btinfo_modulelist, 0, len); 305 btinfo_modulelist_size = len; 306 307 /* Fill in btinfo structure */ 308 buf = (char *)btinfo_modulelist; 309 btinfo_modulelist->num = 0; 310 off = sizeof(struct btinfo_modulelist); 311 312 for (bm = boot_modules; bm; bm = bm->bm_next) { 313 if (bm->bm_len == -1) 314 continue; 315 printf("Loading %s ", bm->bm_path); 316 fd = open(bm->bm_path, 0); 317 if (fd == -1) { 318 printf("ERROR: couldn't open %s\n", bm->bm_path); 319 continue; 320 } 321 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 322 len = pread(fd, (void *)image_end, SSIZE_MAX); 323 if (len < bm->bm_len) { 324 printf(" FAILED\n"); 325 } else { 326 btinfo_modulelist->num++; 327 bi = (struct bi_modulelist_entry *)(buf + off); 328 off += sizeof(struct bi_modulelist_entry); 329 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 330 bi->base = image_end; 331 bi->len = len; 332 bi->type = BI_MODULE_ELF; 333 printf(" \n"); 334 } 335 if (len > 0) 336 image_end += len; 337 close(fd); 338 } 339 btinfo_modulelist->endpa = image_end; 340 } 341
Indexes created Wed Sep 24 14:09:57 GMT 2025