| 1 | /* |
| 2 | * Copyright (c) 1998 Robert Nordier |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are freely |
| 6 | * permitted provided that the above copyright notice and this |
| 7 | * paragraph and the following disclaimer are duplicated in all |
| 8 | * such forms. |
| 9 | * |
| 10 | * This software is provided "AS IS" and without any express or |
| 11 | * implied warranties, including, without limitation, the implied |
| 12 | * warranties of merchantability and fitness for a particular |
| 13 | * purpose. |
| 14 | */ |
| 15 | |
| 16 | /* |
| 17 | * $FreeBSD: src/sys/boot/i386/boot2/boot2.c,v 1.28.2.7 2002/10/10 15:53:24 iwasaki Exp $ |
| 18 | * $DragonFly: src/sys/boot/pc32/boot2/boot2.c,v 1.4 2003/11/09 02:22:33 dillon Exp $ |
| 19 | */ |
| 20 | |
| 21 | #include <sys/param.h> |
| 22 | #include <sys/reboot.h> |
| 23 | #include <sys/diskslice.h> |
| 24 | #include <sys/disklabel.h> |
| 25 | #include <sys/dirent.h> |
| 26 | #include <machine/bootinfo.h> |
| 27 | #include <machine/elf.h> |
| 28 | |
| 29 | #include <vfs/ufs/fs.h> |
| 30 | #include <vfs/ufs/dinode.h> |
| 31 | |
| 32 | #include <stdarg.h> |
| 33 | |
| 34 | #include <a.out.h> |
| 35 | |
| 36 | #include <btxv86.h> |
| 37 | |
| 38 | #include "boot2.h" |
| 39 | #include "lib.h" |
| 40 | |
| 41 | #define RBX_ASKNAME 0x0 /* -a */ |
| 42 | #define RBX_SINGLE 0x1 /* -s */ |
| 43 | #define RBX_DFLTROOT 0x5 /* -r */ |
| 44 | #define RBX_KDB 0x6 /* -d */ |
| 45 | #define RBX_CONFIG 0xa /* -c */ |
| 46 | #define RBX_VERBOSE 0xb /* -v */ |
| 47 | #define RBX_SERIAL 0xc /* -h */ |
| 48 | #define RBX_CDROM 0xd /* -C */ |
| 49 | #define RBX_GDB 0xf /* -g */ |
| 50 | #define RBX_DUAL 0x1d /* -D */ |
| 51 | #define RBX_PROBEKBD 0x1e /* -P */ |
| 52 | #define RBX_NOINTR 0x1f /* -n */ |
| 53 | |
| 54 | #define RBX_MASK 0xffff |
| 55 | |
| 56 | #define PATH_CONFIG "/boot.config" |
| 57 | #define PATH_BOOT3 "/boot/loader" |
| 58 | #define PATH_KERNEL "/kernel" |
| 59 | |
| 60 | #define ARGS 0x900 |
| 61 | #define NOPT 12 |
| 62 | #define BSIZEMAX 16384 |
| 63 | #define NDEV 5 |
| 64 | #define MEM_BASE 0x12 |
| 65 | #define MEM_EXT 0x15 |
| 66 | #define V86_CY(x) ((x) & 1) |
| 67 | #define V86_ZR(x) ((x) & 0x40) |
| 68 | |
| 69 | #define DRV_HARD 0x80 |
| 70 | #define DRV_MASK 0x7f |
| 71 | |
| 72 | #define TYPE_AD 0 |
| 73 | #define TYPE_WD 1 |
| 74 | #define TYPE_WFD 2 |
| 75 | #define TYPE_FD 3 |
| 76 | #define TYPE_DA 4 |
| 77 | |
| 78 | extern uint32_t _end; |
| 79 | |
| 80 | static const char optstr[NOPT] = "DhaCcdgnPrsv"; |
| 81 | static const unsigned char flags[NOPT] = { |
| 82 | RBX_DUAL, |
| 83 | RBX_SERIAL, |
| 84 | RBX_ASKNAME, |
| 85 | RBX_CDROM, |
| 86 | RBX_CONFIG, |
| 87 | RBX_KDB, |
| 88 | RBX_GDB, |
| 89 | RBX_NOINTR, |
| 90 | RBX_PROBEKBD, |
| 91 | RBX_DFLTROOT, |
| 92 | RBX_SINGLE, |
| 93 | RBX_VERBOSE |
| 94 | }; |
| 95 | |
| 96 | static const char *const dev_nm[] = {"ad", "wd", " ", "fd", "da"}; |
| 97 | static const unsigned dev_maj[] = {30, 0, 1, 2, 4}; |
| 98 | |
| 99 | static struct dsk { |
| 100 | unsigned drive; |
| 101 | unsigned type; |
| 102 | unsigned unit; |
| 103 | unsigned slice; |
| 104 | unsigned part; |
| 105 | unsigned start; |
| 106 | int init; |
| 107 | int meta; |
| 108 | } dsk; |
| 109 | static char cmd[512]; |
| 110 | static char kname[1024]; |
| 111 | static uint32_t opts; |
| 112 | static struct bootinfo bootinfo; |
| 113 | static int ls; |
| 114 | static uint32_t fs_off; |
| 115 | static uint8_t ioctrl = 0x1; |
| 116 | |
| 117 | void exit(int); |
| 118 | static void load(const char *); |
| 119 | static int parse(char *); |
| 120 | static ino_t lookup(const char *); |
| 121 | static int xfsread(ino_t, void *, size_t); |
| 122 | static ssize_t fsread(ino_t, void *, size_t); |
| 123 | static int dskread(void *, unsigned, unsigned); |
| 124 | static int printf(const char *,...); |
| 125 | static int putchar(int); |
| 126 | static void *memcpy(void *, const void *, size_t); |
| 127 | static void *malloc(size_t); |
| 128 | static uint32_t memsize(int); |
| 129 | static int drvread(void *, unsigned, unsigned); |
| 130 | static int keyhit(unsigned); |
| 131 | static int xputc(int); |
| 132 | static int xgetc(int); |
| 133 | static int getc(int); |
| 134 | |
| 135 | static inline void |
| 136 | readfile(const char *fname, void *buf, size_t size) |
| 137 | { |
| 138 | ino_t ino; |
| 139 | |
| 140 | if ((ino = lookup(fname))) |
| 141 | fsread(ino, buf, size); |
| 142 | } |
| 143 | |
| 144 | static inline int |
| 145 | strcmp(const char *s1, const char *s2) |
| 146 | { |
| 147 | for (; *s1 == *s2 && *s1; s1++, s2++); |
| 148 | return (u_char)*s1 - (u_char)*s2; |
| 149 | } |
| 150 | |
| 151 | static inline int |
| 152 | fsfind(const char *name, ino_t * ino) |
| 153 | { |
| 154 | char buf[DEV_BSIZE]; |
| 155 | struct dirent *d; |
| 156 | char *s; |
| 157 | ssize_t n; |
| 158 | |
| 159 | fs_off = 0; |
| 160 | while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0) |
| 161 | for (s = buf; s < buf + DEV_BSIZE;) { |
| 162 | d = (void *)s; |
| 163 | if (ls) |
| 164 | printf("%s ", d->d_name); |
| 165 | else if (!strcmp(name, d->d_name)) { |
| 166 | *ino = d->d_fileno; |
| 167 | return d->d_type; |
| 168 | } |
| 169 | s += d->d_reclen; |
| 170 | } |
| 171 | if (n != -1 && ls) |
| 172 | putchar('\n'); |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static inline int |
| 177 | getchar(void) |
| 178 | { |
| 179 | int c; |
| 180 | |
| 181 | c = xgetc(0); |
| 182 | if (c == '\r') |
| 183 | c = '\n'; |
| 184 | return c; |
| 185 | } |
| 186 | |
| 187 | static inline void |
| 188 | getstr(char *str, int size) |
| 189 | { |
| 190 | char *s; |
| 191 | int c; |
| 192 | |
| 193 | s = str; |
| 194 | do { |
| 195 | switch (c = getchar()) { |
| 196 | case 0: |
| 197 | break; |
| 198 | case '\b': |
| 199 | case '\177': |
| 200 | if (s > str) { |
| 201 | s--; |
| 202 | putchar('\b'); |
| 203 | putchar(' '); |
| 204 | } else |
| 205 | c = 0; |
| 206 | break; |
| 207 | case '\n': |
| 208 | *s = 0; |
| 209 | break; |
| 210 | default: |
| 211 | if (s - str < size - 1) |
| 212 | *s++ = c; |
| 213 | } |
| 214 | if (c) |
| 215 | putchar(c); |
| 216 | } while (c != '\n'); |
| 217 | } |
| 218 | |
| 219 | static inline uint32_t |
| 220 | drvinfo(int drive) |
| 221 | { |
| 222 | v86.addr = 0x13; |
| 223 | v86.eax = 0x800; |
| 224 | v86.edx = DRV_HARD + drive; |
| 225 | v86int(); |
| 226 | if (V86_CY(v86.efl)) |
| 227 | return 0x4f010f; |
| 228 | return ((v86.ecx & 0xc0) << 18) | ((v86.ecx & 0xff00) << 8) | |
| 229 | (v86.edx & 0xff00) | (v86.ecx & 0x3f); |
| 230 | } |
| 231 | |
| 232 | static inline void |
| 233 | putc(int c) |
| 234 | { |
| 235 | v86.addr = 0x10; |
| 236 | v86.eax = 0xe00 | (c & 0xff); |
| 237 | v86.ebx = 0x7; |
| 238 | v86int(); |
| 239 | } |
| 240 | |
| 241 | int |
| 242 | main(void) |
| 243 | { |
| 244 | int autoboot, i; |
| 245 | |
| 246 | v86.ctl = V86_FLAGS; |
| 247 | dsk.drive = *(uint8_t *)PTOV(ARGS); |
| 248 | dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD; |
| 249 | dsk.unit = dsk.drive & DRV_MASK; |
| 250 | dsk.slice = *(uint8_t *)PTOV(ARGS + 1) + 1; |
| 251 | bootinfo.bi_version = BOOTINFO_VERSION; |
| 252 | bootinfo.bi_size = sizeof(bootinfo); |
| 253 | bootinfo.bi_basemem = 0; /* XXX will be filled by loader or kernel */ |
| 254 | bootinfo.bi_extmem = memsize(MEM_EXT); |
| 255 | bootinfo.bi_memsizes_valid++; |
| 256 | for (i = 0; i < N_BIOS_GEOM; i++) |
| 257 | bootinfo.bi_bios_geom[i] = drvinfo(i); |
| 258 | autoboot = 2; |
| 259 | readfile(PATH_CONFIG, cmd, sizeof(cmd)); |
| 260 | if (*cmd) { |
| 261 | printf("%s: %s", PATH_CONFIG, cmd); |
| 262 | if (parse(cmd)) |
| 263 | autoboot = 0; |
| 264 | *cmd = 0; |
| 265 | } |
| 266 | if (autoboot && !*kname) { |
| 267 | if (autoboot == 2) { |
| 268 | memcpy(kname, PATH_BOOT3, sizeof(PATH_BOOT3)); |
| 269 | if (!keyhit(0x37)) { |
| 270 | load(kname); |
| 271 | autoboot = 1; |
| 272 | } |
| 273 | } |
| 274 | if (autoboot == 1) |
| 275 | memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); |
| 276 | } |
| 277 | for (;;) { |
| 278 | printf(" \n>> FreeBSD/i386 BOOT\n" |
| 279 | "Default: %u:%s(%u,%c)%s\n" |
| 280 | "boot: ", |
| 281 | dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit, |
| 282 | 'a' + dsk.part, kname); |
| 283 | if (ioctrl & 0x2) |
| 284 | sio_flush(); |
| 285 | if (!autoboot || keyhit(0x5a)) |
| 286 | getstr(cmd, sizeof(cmd)); |
| 287 | else |
| 288 | putchar('\n'); |
| 289 | autoboot = 0; |
| 290 | if (parse(cmd)) |
| 291 | putchar('\a'); |
| 292 | else |
| 293 | load(kname); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | /* XXX - Needed for btxld to link the boot2 binary; do not remove. */ |
| 298 | void |
| 299 | exit(int x) |
| 300 | { |
| 301 | } |
| 302 | |
| 303 | static void |
| 304 | load(const char *fname) |
| 305 | { |
| 306 | union { |
| 307 | struct exec ex; |
| 308 | Elf32_Ehdr eh; |
| 309 | } hdr; |
| 310 | Elf32_Phdr ep[2]; |
| 311 | Elf32_Shdr es[2]; |
| 312 | caddr_t p; |
| 313 | ino_t ino; |
| 314 | uint32_t addr, x; |
| 315 | int fmt, i, j; |
| 316 | |
| 317 | if (!(ino = lookup(fname))) { |
| 318 | if (!ls) |
| 319 | printf("No %s\n", fname); |
| 320 | return; |
| 321 | } |
| 322 | if (xfsread(ino, &hdr, sizeof(hdr))) |
| 323 | return; |
| 324 | if (N_GETMAGIC(hdr.ex) == ZMAGIC) |
| 325 | fmt = 0; |
| 326 | else if (IS_ELF(hdr.eh)) |
| 327 | fmt = 1; |
| 328 | else { |
| 329 | printf("Invalid %s\n", "format"); |
| 330 | return; |
| 331 | } |
| 332 | if (fmt == 0) { |
| 333 | addr = hdr.ex.a_entry & 0xffffff; |
| 334 | p = PTOV(addr); |
| 335 | fs_off = PAGE_SIZE; |
| 336 | if (xfsread(ino, p, hdr.ex.a_text)) |
| 337 | return; |
| 338 | p += roundup2(hdr.ex.a_text, PAGE_SIZE); |
| 339 | if (xfsread(ino, p, hdr.ex.a_data)) |
| 340 | return; |
| 341 | p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); |
| 342 | bootinfo.bi_symtab = VTOP(p); |
| 343 | memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); |
| 344 | p += sizeof(hdr.ex.a_syms); |
| 345 | if (hdr.ex.a_syms) { |
| 346 | if (xfsread(ino, p, hdr.ex.a_syms)) |
| 347 | return; |
| 348 | p += hdr.ex.a_syms; |
| 349 | if (xfsread(ino, p, sizeof(int))) |
| 350 | return; |
| 351 | x = *(uint32_t *)p; |
| 352 | p += sizeof(int); |
| 353 | x -= sizeof(int); |
| 354 | if (xfsread(ino, p, x)) |
| 355 | return; |
| 356 | p += x; |
| 357 | } |
| 358 | } else { |
| 359 | fs_off = hdr.eh.e_phoff; |
| 360 | for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { |
| 361 | if (xfsread(ino, ep + j, sizeof(ep[0]))) |
| 362 | return; |
| 363 | if (ep[j].p_type == PT_LOAD) |
| 364 | j++; |
| 365 | } |
| 366 | for (i = 0; i < 2; i++) { |
| 367 | p = PTOV(ep[i].p_paddr & 0xffffff); |
| 368 | fs_off = ep[i].p_offset; |
| 369 | if (xfsread(ino, p, ep[i].p_filesz)) |
| 370 | return; |
| 371 | } |
| 372 | p += roundup2(ep[1].p_memsz, PAGE_SIZE); |
| 373 | bootinfo.bi_symtab = VTOP(p); |
| 374 | if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { |
| 375 | fs_off = hdr.eh.e_shoff + sizeof(es[0]) * |
| 376 | (hdr.eh.e_shstrndx + 1); |
| 377 | if (xfsread(ino, &es, sizeof(es))) |
| 378 | return; |
| 379 | for (i = 0; i < 2; i++) { |
| 380 | memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); |
| 381 | p += sizeof(es[i].sh_size); |
| 382 | fs_off = es[i].sh_offset; |
| 383 | if (xfsread(ino, p, es[i].sh_size)) |
| 384 | return; |
| 385 | p += es[i].sh_size; |
| 386 | } |
| 387 | } |
| 388 | addr = hdr.eh.e_entry & 0xffffff; |
| 389 | } |
| 390 | bootinfo.bi_esymtab = VTOP(p); |
| 391 | bootinfo.bi_kernelname = VTOP(fname); |
| 392 | bootinfo.bi_bios_dev = dsk.drive; |
| 393 | __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), |
| 394 | MAKEBOOTDEV(dev_maj[dsk.type], 0, dsk.slice, dsk.unit, dsk.part), |
| 395 | 0, 0, 0, VTOP(&bootinfo)); |
| 396 | } |
| 397 | |
| 398 | static int |
| 399 | parse(char *arg) |
| 400 | { |
| 401 | char *p, *q; |
| 402 | int drv, c, i; |
| 403 | |
| 404 | while ((c = *arg++)) { |
| 405 | if (c == ' ' || c == '\t' || c == '\n') |
| 406 | continue; |
| 407 | for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); |
| 408 | if (*p) |
| 409 | *p++ = 0; |
| 410 | if (c == '-') { |
| 411 | while ((c = *arg++)) { |
| 412 | for (i = 0; c != optstr[i]; i++) |
| 413 | if (i == NOPT - 1) |
| 414 | return -1; |
| 415 | opts ^= 1 << flags[i]; |
| 416 | } |
| 417 | if (opts & 1 << RBX_PROBEKBD) { |
| 418 | i = *(uint8_t *)PTOV(0x496) & 0x10; |
| 419 | printf("Keyboard: %s\n", i ? "yes" : "no"); |
| 420 | if (!i) |
| 421 | opts |= 1 << RBX_DUAL | 1 << RBX_SERIAL; |
| 422 | opts &= ~(1 << RBX_PROBEKBD); |
| 423 | } |
| 424 | ioctrl = opts & 1 << RBX_DUAL ? 0x3 : |
| 425 | opts & 1 << RBX_SERIAL ? 0x2 : 0x1; |
| 426 | if (ioctrl & 0x2) |
| 427 | sio_init(); |
| 428 | } else { |
| 429 | for (q = arg--; *q && *q != '('; q++); |
| 430 | if (*q) { |
| 431 | drv = -1; |
| 432 | if (arg[1] == ':') { |
| 433 | if (*arg < '0' || *arg > '9') |
| 434 | return -1; |
| 435 | drv = *arg - '0'; |
| 436 | arg += 2; |
| 437 | } |
| 438 | if (q - arg != 2) |
| 439 | return -1; |
| 440 | for (i = 0; arg[0] != dev_nm[i][0] || |
| 441 | arg[1] != dev_nm[i][1]; i++) |
| 442 | if (i == NDEV - 1) |
| 443 | return -1; |
| 444 | dsk.type = i; |
| 445 | arg += 3; |
| 446 | if (arg[1] != ',' || *arg < '0' || *arg > '9') |
| 447 | return -1; |
| 448 | dsk.unit = *arg - '0'; |
| 449 | arg += 2; |
| 450 | dsk.slice = WHOLE_DISK_SLICE; |
| 451 | if (arg[1] == ',') { |
| 452 | if (*arg < '0' || *arg > '0' + NDOSPART) |
| 453 | return -1; |
| 454 | if ((dsk.slice = *arg - '0')) |
| 455 | dsk.slice++; |
| 456 | arg += 2; |
| 457 | } |
| 458 | if (arg[1] != ')' || *arg < 'a' || *arg > 'p') |
| 459 | return -1; |
| 460 | dsk.part = *arg - 'a'; |
| 461 | arg += 2; |
| 462 | if (drv == -1) |
| 463 | drv = dsk.unit; |
| 464 | dsk.drive = (dsk.type == TYPE_WD || |
| 465 | dsk.type == TYPE_AD || |
| 466 | dsk.type == TYPE_DA ? DRV_HARD : 0) + drv; |
| 467 | dsk.meta = 0; |
| 468 | fsread(0, NULL, 0); |
| 469 | } |
| 470 | if ((i = p - arg - !*(p - 1))) { |
| 471 | if (i >= sizeof(kname)) |
| 472 | return -1; |
| 473 | memcpy(kname, arg, i + 1); |
| 474 | } |
| 475 | } |
| 476 | arg = p; |
| 477 | } |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | static ino_t |
| 482 | lookup(const char *path) |
| 483 | { |
| 484 | char name[MAXNAMLEN + 1]; |
| 485 | const char *s; |
| 486 | ino_t ino; |
| 487 | ssize_t n; |
| 488 | int dt; |
| 489 | |
| 490 | ino = ROOTINO; |
| 491 | dt = DT_DIR; |
| 492 | for (;;) { |
| 493 | if (*path == '/') |
| 494 | path++; |
| 495 | if (!*path) |
| 496 | break; |
| 497 | for (s = path; *s && *s != '/'; s++); |
| 498 | if ((n = s - path) > MAXNAMLEN) |
| 499 | return 0; |
| 500 | ls = *path == '?' && n == 1 && !*s; |
| 501 | memcpy(name, path, n); |
| 502 | name[n] = 0; |
| 503 | if ((dt = fsfind(name, &ino)) <= 0) |
| 504 | break; |
| 505 | path = s; |
| 506 | } |
| 507 | return dt == DT_REG ? ino : 0; |
| 508 | } |
| 509 | static int |
| 510 | xfsread(ino_t inode, void *buf, size_t nbyte) |
| 511 | { |
| 512 | if (fsread(inode, buf, nbyte) != nbyte) { |
| 513 | printf("Invalid %s\n", "format"); |
| 514 | return -1; |
| 515 | } |
| 516 | return 0; |
| 517 | } |
| 518 | |
| 519 | static ssize_t |
| 520 | fsread(ino_t inode, void *buf, size_t nbyte) |
| 521 | { |
| 522 | static struct fs fs; |
| 523 | static struct dinode din; |
| 524 | static char *blkbuf; |
| 525 | static ufs_daddr_t *indbuf; |
| 526 | static ino_t inomap; |
| 527 | static ufs_daddr_t blkmap, indmap; |
| 528 | static unsigned fsblks; |
| 529 | char *s; |
| 530 | ufs_daddr_t lbn, addr; |
| 531 | size_t n, nb, off; |
| 532 | |
| 533 | if (!dsk.meta) { |
| 534 | if (!blkbuf) |
| 535 | blkbuf = malloc(BSIZEMAX); |
| 536 | inomap = 0; |
| 537 | if (dskread(blkbuf, SBOFF / DEV_BSIZE, SBSIZE / DEV_BSIZE)) |
| 538 | return -1; |
| 539 | memcpy(&fs, blkbuf, sizeof(fs)); |
| 540 | if (fs.fs_magic != FS_MAGIC) { |
| 541 | printf("Not ufs\n"); |
| 542 | return -1; |
| 543 | } |
| 544 | fsblks = fs.fs_bsize >> DEV_BSHIFT; |
| 545 | dsk.meta++; |
| 546 | } |
| 547 | if (!inode) |
| 548 | return 0; |
| 549 | if (inomap != inode) { |
| 550 | if (dskread(blkbuf, fsbtodb(&fs, ino_to_fsba(&fs, inode)), |
| 551 | fsblks)) |
| 552 | return -1; |
| 553 | din = ((struct dinode *)blkbuf)[inode % INOPB(&fs)]; |
| 554 | inomap = inode; |
| 555 | fs_off = 0; |
| 556 | blkmap = indmap = 0; |
| 557 | } |
| 558 | s = buf; |
| 559 | if (nbyte > (n = din.di_size - fs_off)) |
| 560 | nbyte = n; |
| 561 | nb = nbyte; |
| 562 | while (nb) { |
| 563 | lbn = lblkno(&fs, fs_off); |
| 564 | if (lbn < NDADDR) |
| 565 | addr = din.di_db[lbn]; |
| 566 | else { |
| 567 | if (indmap != din.di_ib[0]) { |
| 568 | if (!indbuf) |
| 569 | indbuf = malloc(BSIZEMAX); |
| 570 | if (dskread(indbuf, fsbtodb(&fs, din.di_ib[0]), |
| 571 | fsblks)) |
| 572 | return -1; |
| 573 | indmap = din.di_ib[0]; |
| 574 | } |
| 575 | addr = indbuf[(lbn - NDADDR) % NINDIR(&fs)]; |
| 576 | } |
| 577 | n = dblksize(&fs, &din, lbn); |
| 578 | if (blkmap != addr) { |
| 579 | if (dskread(blkbuf, fsbtodb(&fs, addr), n >> DEV_BSHIFT)) |
| 580 | return -1; |
| 581 | blkmap = addr; |
| 582 | } |
| 583 | off = blkoff(&fs, fs_off); |
| 584 | n -= off; |
| 585 | if (n > nb) |
| 586 | n = nb; |
| 587 | memcpy(s, blkbuf + off, n); |
| 588 | s += n; |
| 589 | fs_off += n; |
| 590 | nb -= n; |
| 591 | } |
| 592 | return nbyte; |
| 593 | } |
| 594 | |
| 595 | static int |
| 596 | dskread(void *buf, unsigned lba, unsigned nblk) |
| 597 | { |
| 598 | static char *sec; |
| 599 | struct dos_partition *dp; |
| 600 | struct disklabel *d; |
| 601 | unsigned sl, i; |
| 602 | |
| 603 | if (!dsk.meta) { |
| 604 | if (!sec) |
| 605 | sec = malloc(DEV_BSIZE); |
| 606 | dsk.start = 0; |
| 607 | if (drvread(sec, DOSBBSECTOR, 1)) |
| 608 | return -1; |
| 609 | dp = (void *)(sec + DOSPARTOFF); |
| 610 | sl = dsk.slice; |
| 611 | if (sl < BASE_SLICE) { |
| 612 | for (i = 0; i < NDOSPART; i++) |
| 613 | if (dp[i].dp_typ == DOSPTYP_386BSD && |
| 614 | (dp[i].dp_flag & 0x80 || sl < BASE_SLICE)) { |
| 615 | sl = BASE_SLICE + i; |
| 616 | if (dp[i].dp_flag & 0x80 || |
| 617 | dsk.slice == COMPATIBILITY_SLICE) |
| 618 | break; |
| 619 | } |
| 620 | if (dsk.slice == WHOLE_DISK_SLICE) |
| 621 | dsk.slice = sl; |
| 622 | } |
| 623 | if (sl != WHOLE_DISK_SLICE) { |
| 624 | if (sl != COMPATIBILITY_SLICE) |
| 625 | dp += sl - BASE_SLICE; |
| 626 | if (dp->dp_typ != DOSPTYP_386BSD) { |
| 627 | printf("Invalid %s\n", "slice"); |
| 628 | return -1; |
| 629 | } |
| 630 | dsk.start = dp->dp_start; |
| 631 | } |
| 632 | if (drvread(sec, dsk.start + LABELSECTOR, 1)) |
| 633 | return -1; |
| 634 | d = (void *)(sec + LABELOFFSET); |
| 635 | if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) { |
| 636 | if (dsk.part != RAW_PART) { |
| 637 | printf("Invalid %s\n", "label"); |
| 638 | return -1; |
| 639 | } |
| 640 | } else { |
| 641 | if (!dsk.init) { |
| 642 | if (d->d_type == DTYPE_SCSI) |
| 643 | dsk.type = TYPE_DA; |
| 644 | dsk.init++; |
| 645 | } |
| 646 | if (dsk.part >= d->d_npartitions || |
| 647 | !d->d_partitions[dsk.part].p_size) { |
| 648 | printf("Invalid %s\n", "partition"); |
| 649 | return -1; |
| 650 | } |
| 651 | dsk.start = d->d_partitions[dsk.part].p_offset; |
| 652 | } |
| 653 | } |
| 654 | return drvread(buf, dsk.start + lba, nblk); |
| 655 | } |
| 656 | |
| 657 | static int |
| 658 | printf(const char *fmt,...) |
| 659 | { |
| 660 | static const char digits[16] = "0123456789abcdef"; |
| 661 | __va_list ap; |
| 662 | char buf[10]; |
| 663 | char *s; |
| 664 | unsigned r, u; |
| 665 | int c; |
| 666 | |
| 667 | __va_start(ap, fmt); |
| 668 | while ((c = *fmt++)) { |
| 669 | if (c == '%') { |
| 670 | c = *fmt++; |
| 671 | switch (c) { |
| 672 | case 'c': |
| 673 | putchar(__va_arg(ap, int)); |
| 674 | continue; |
| 675 | case 's': |
| 676 | for (s = __va_arg(ap, char *); *s; s++) |
| 677 | putchar(*s); |
| 678 | continue; |
| 679 | case 'u': |
| 680 | case 'x': |
| 681 | r = c == 'u' ? 10U : 16U; |
| 682 | u = __va_arg(ap, unsigned); |
| 683 | s = buf; |
| 684 | do |
| 685 | *s++ = digits[u % r]; |
| 686 | while (u /= r); |
| 687 | while (--s >= buf) |
| 688 | putchar(*s); |
| 689 | continue; |
| 690 | } |
| 691 | } |
| 692 | putchar(c); |
| 693 | } |
| 694 | __va_end(ap); |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | static int |
| 699 | putchar(int c) |
| 700 | { |
| 701 | if (c == '\n') |
| 702 | xputc('\r'); |
| 703 | return xputc(c); |
| 704 | } |
| 705 | |
| 706 | static void * |
| 707 | memcpy(void *dst, const void *src, size_t size) |
| 708 | { |
| 709 | const char *s; |
| 710 | char *d; |
| 711 | |
| 712 | for (d = dst, s = src; size; size--) |
| 713 | *d++ = *s++; |
| 714 | return dst; |
| 715 | } |
| 716 | |
| 717 | static void * |
| 718 | malloc(size_t size) |
| 719 | { |
| 720 | static uint32_t next; |
| 721 | void *p; |
| 722 | |
| 723 | if (!next) |
| 724 | next = roundup2(__base + _end, 0x10000) - __base; |
| 725 | p = (void *)next; |
| 726 | next += size; |
| 727 | return p; |
| 728 | } |
| 729 | |
| 730 | static uint32_t |
| 731 | memsize(int type) |
| 732 | { |
| 733 | v86.addr = type; |
| 734 | v86.eax = 0x8800; |
| 735 | v86int(); |
| 736 | return v86.eax; |
| 737 | } |
| 738 | |
| 739 | static int |
| 740 | drvread(void *buf, unsigned lba, unsigned nblk) |
| 741 | { |
| 742 | static unsigned c = 0x2d5c7c2f; |
| 743 | |
| 744 | printf("%c\b", c = c << 8 | c >> 24); |
| 745 | v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS; |
| 746 | v86.addr = XREADORG; /* call to xread in boot1 */ |
| 747 | v86.es = VTOPSEG(buf); |
| 748 | v86.eax = lba; |
| 749 | v86.ebx = VTOPOFF(buf); |
| 750 | v86.ecx = lba >> 16; |
| 751 | v86.edx = nblk << 8 | dsk.drive; |
| 752 | v86int(); |
| 753 | v86.ctl = V86_FLAGS; |
| 754 | if (V86_CY(v86.efl)) { |
| 755 | printf("Disk error 0x%x (lba=0x%x)\n", v86.eax >> 8 & 0xff, |
| 756 | lba); |
| 757 | return -1; |
| 758 | } |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | static int |
| 763 | keyhit(unsigned ticks) |
| 764 | { |
| 765 | uint32_t t0, t1; |
| 766 | |
| 767 | if (opts & 1 << RBX_NOINTR) |
| 768 | return 0; |
| 769 | t0 = 0; |
| 770 | for (;;) { |
| 771 | if (xgetc(1)) |
| 772 | return 1; |
| 773 | t1 = *(uint32_t *)PTOV(0x46c); |
| 774 | if (!t0) |
| 775 | t0 = t1; |
| 776 | if (t1 < t0 || t1 >= t0 + ticks) |
| 777 | return 0; |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | static int |
| 782 | xputc(int c) |
| 783 | { |
| 784 | if (ioctrl & 0x1) |
| 785 | putc(c); |
| 786 | if (ioctrl & 0x2) |
| 787 | sio_putc(c); |
| 788 | return c; |
| 789 | } |
| 790 | |
| 791 | static int |
| 792 | xgetc(int fn) |
| 793 | { |
| 794 | if (opts & 1 << RBX_NOINTR) |
| 795 | return 0; |
| 796 | for (;;) { |
| 797 | if (ioctrl & 0x1 && getc(1)) |
| 798 | return fn ? 1 : getc(0); |
| 799 | if (ioctrl & 0x2 && sio_ischar()) |
| 800 | return fn ? 1 : sio_getc(); |
| 801 | if (fn) |
| 802 | return 0; |
| 803 | } |
| 804 | } |
| 805 | |
| 806 | static int |
| 807 | getc(int fn) |
| 808 | { |
| 809 | v86.addr = 0x16; |
| 810 | v86.eax = fn << 8; |
| 811 | v86int(); |
| 812 | return fn == 0 ? v86.eax & 0xff : !V86_ZR(v86.efl); |
| 813 | } |