exec.c revision 1.25
1 /* $NetBSD: exec.c,v 1.25 2008/05/04 11:00:09 martin 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; 132 133 static void module_init(void); 134 135 int 136 exec_netbsd(const char *file, physaddr_t loadaddr, int boothowto) 137 { 138 u_long boot_argv[BOOT_NARGS]; 139 int fd; 140 u_long marks[MARK_MAX]; 141 struct btinfo_symtab btinfo_symtab; 142 u_long extmem; 143 u_long basemem; 144 #ifdef XMS 145 u_long xmsmem; 146 physaddr_t origaddr = loadaddr; 147 #endif 148 149 #ifdef DEBUG 150 printf("exec: file=%s loadaddr=0x%lx\n", 151 file ? file : "NULL", loadaddr); 152 #endif 153 154 BI_ALLOC(32); /* ??? */ 155 156 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 157 158 extmem = getextmem(); 159 basemem = getbasemem(); 160 161 #ifdef XMS 162 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 163 u_long kernsize; 164 165 /* 166 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 167 * getextmem() is getextmem1(). Without, the "smart" 168 * methods could fail to report all memory as well. 169 * xmsmem is a few kB less than the actual size, but 170 * better than nothing. 171 */ 172 if (xmsmem > extmem) 173 extmem = xmsmem; 174 /* 175 * Get the size of the kernel 176 */ 177 marks[MARK_START] = loadaddr; 178 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 179 goto out; 180 close(fd); 181 182 kernsize = marks[MARK_END]; 183 kernsize = (kernsize + 1023) / 1024; 184 185 loadaddr = xmsalloc(kernsize); 186 if (!loadaddr) 187 return ENOMEM; 188 } 189 #endif 190 marks[MARK_START] = loadaddr; 191 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 192 goto out; 193 194 boot_argv[0] = boothowto; 195 boot_argv[1] = 0; 196 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 197 /* argv[3] below */ 198 boot_argv[4] = extmem; 199 boot_argv[5] = basemem; 200 201 close(fd); 202 203 /* 204 * Gather some information for the kernel. Do this after the 205 * "point of no return" to avoid memory leaks. 206 * (but before DOS might be trashed in the XMS case) 207 */ 208 #ifdef PASS_BIOSGEOM 209 bi_getbiosgeom(); 210 #endif 211 #ifdef PASS_MEMMAP 212 bi_getmemmap(); 213 #endif 214 215 #ifdef XMS 216 if (loadaddr != origaddr) { 217 /* 218 * We now have done our last DOS IO, so we may 219 * trash the OS. Copy the data from the temporary 220 * buffer to its real address. 221 */ 222 marks[MARK_START] -= loadaddr; 223 marks[MARK_END] -= loadaddr; 224 marks[MARK_SYM] -= loadaddr; 225 marks[MARK_END] -= loadaddr; 226 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 227 } 228 #endif 229 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 230 (-sizeof(int)); 231 boot_argv[3] = marks[MARK_END]; 232 image_end = marks[MARK_END]; 233 kernel_loaded = true; 234 235 /* pull in any modules if necessary */ 236 if (boot_modules_enabled) { 237 module_init(); 238 if (btinfo_modulelist) { 239 BI_ADD(btinfo_modulelist, BTINFO_MODULELIST, 240 btinfo_modulelist_size); 241 } 242 } 243 244 #ifdef DEBUG 245 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 246 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 247 #endif 248 249 btinfo_symtab.nsym = marks[MARK_NSYM]; 250 btinfo_symtab.ssym = marks[MARK_SYM]; 251 btinfo_symtab.esym = marks[MARK_END]; 252 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 253 254 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 255 x86_trunc_page(basemem*1024)); 256 panic("exec returned"); 257 258 out: 259 BI_FREE(); 260 bootinfo = 0; 261 return -1; 262 } 263 264 static void 265 module_init(void) 266 { 267 struct bi_modulelist_entry *bi; 268 struct stat st; 269 char *buf; 270 boot_module_t *bm; 271 size_t len; 272 off_t off; 273 int err, fd; 274 275 /* First, see which modules are valid and calculate btinfo size */ 276 len = sizeof(struct btinfo_modulelist); 277 for (bm = boot_modules; bm; bm = bm->bm_next) { 278 fd = open(bm->bm_path, 0); 279 if (fd == -1) { 280 printf("WARNING: couldn't open %s\n", bm->bm_path); 281 bm->bm_len = -1; 282 continue; 283 } 284 err = fstat(fd, &st); 285 if (err == -1 || st.st_size == -1) { 286 printf("WARNING: couldn't stat %s\n", bm->bm_path); 287 close(fd); 288 bm->bm_len = -1; 289 continue; 290 } 291 bm->bm_len = st.st_size; 292 close(fd); 293 len += sizeof(struct bi_modulelist_entry); 294 } 295 296 /* Allocate the module list */ 297 btinfo_modulelist = alloc(len); 298 if (btinfo_modulelist == NULL) { 299 printf("WARNING: couldn't allocate module list\n"); 300 return; 301 } 302 memset(btinfo_modulelist, 0, len); 303 btinfo_modulelist_size = len; 304 305 /* Fill in btinfo structure */ 306 buf = (char *)btinfo_modulelist; 307 btinfo_modulelist->num = 0; 308 off = sizeof(struct btinfo_modulelist); 309 310 for (bm = boot_modules; bm; bm = bm->bm_next) { 311 if (bm->bm_len == -1) 312 continue; 313 printf("Loading %s ", bm->bm_path); 314 fd = open(bm->bm_path, 0); 315 if (fd == -1) { 316 printf("ERROR: couldn't open %s\n", bm->bm_path); 317 continue; 318 } 319 image_end = (image_end + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1); 320 len = pread(fd, (void *)image_end, SSIZE_MAX); 321 if (len < bm->bm_len) { 322 printf(" FAILED\n"); 323 } else { 324 btinfo_modulelist->num++; 325 bi = (struct bi_modulelist_entry *)(buf + off); 326 off += sizeof(struct bi_modulelist_entry); 327 strncpy(bi->path, bm->bm_path, sizeof(bi->path) - 1); 328 bi->base = image_end; 329 bi->len = len; 330 bi->type = BI_MODULE_ELF; 331 printf(" \n"); 332 } 333 if (len > 0) 334 image_end += len; 335 close(fd); 336 } 337 btinfo_modulelist->endpa = image_end; 338 } 339
Indexes created Thu Oct 02 14:10:14 GMT 2025