Annotation of sys/arch/sparc/stand/installboot/installboot.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: installboot.c,v 1.4 2003/08/25 23:36:46 tedu Exp $ */
! 2: /* $NetBSD: installboot.c,v 1.1 1997/06/01 03:39:45 mrg Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1994 Paul Kranenburg
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by Paul Kranenburg.
! 19: * 4. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: #include <sys/param.h>
! 35: #include <sys/mount.h>
! 36: #include <sys/time.h>
! 37: #include <sys/stat.h>
! 38: #include <sys/sysctl.h>
! 39: #include <ufs/ufs/dinode.h>
! 40: #include <ufs/ufs/dir.h>
! 41: #include <ufs/ffs/fs.h>
! 42: #include <err.h>
! 43: #include <a.out.h>
! 44: #include <fcntl.h>
! 45: #include <nlist.h>
! 46: #include <stdlib.h>
! 47: #include <stdio.h>
! 48: #include <string.h>
! 49: #include <unistd.h>
! 50:
! 51: int verbose, nowrite, hflag;
! 52: char *boot, *proto, *dev;
! 53:
! 54: struct nlist nl[] = {
! 55: #define X_BLOCKTABLE 0
! 56: {"_block_table"},
! 57: #define X_BLOCKCOUNT 1
! 58: {"_block_count"},
! 59: #define X_BLOCKSIZE 2
! 60: {"_block_size"},
! 61: {NULL}
! 62: };
! 63: daddr_t *block_table; /* block number array in prototype image */
! 64: int32_t *block_count_p; /* size of this array */
! 65: int32_t *block_size_p; /* filesystem block size */
! 66: int32_t max_block_count;
! 67:
! 68: char *karch;
! 69: char cpumodel[130];
! 70:
! 71: int isofsblk = 0;
! 72: int isofseblk = 0;
! 73:
! 74: char *loadprotoblocks(char *, long *);
! 75: int loadblocknums(char *, int);
! 76: static void devread(int, void *, daddr_t, size_t, char *);
! 77: static void usage(void);
! 78: int main(int, char *[]);
! 79:
! 80:
! 81: static void
! 82: usage()
! 83: {
! 84: fprintf(stderr,
! 85: "usage: installboot [-n] [-v] [-h] [-s isofsblk -e isofseblk] [-a <karch>] <boot> <proto> <device>\n");
! 86: exit(1);
! 87: }
! 88:
! 89: int
! 90: main(argc, argv)
! 91: int argc;
! 92: char *argv[];
! 93: {
! 94: int c;
! 95: int devfd;
! 96: char *protostore;
! 97: long protosize;
! 98: int mib[2];
! 99: size_t size;
! 100:
! 101: while ((c = getopt(argc, argv, "a:vnhs:e:")) != -1) {
! 102: switch (c) {
! 103: case 'a':
! 104: karch = optarg;
! 105: break;
! 106: case 'h': /* Note: for backwards compatibility */
! 107: /* Don't strip a.out header */
! 108: hflag = 1;
! 109: break;
! 110: case 'n':
! 111: /* Do not actually write the bootblock to disk */
! 112: nowrite = 1;
! 113: break;
! 114: case 'v':
! 115: /* Chat */
! 116: verbose = 1;
! 117: break;
! 118: case 's':
! 119: isofsblk = atoi(optarg);
! 120: break;
! 121: case 'e':
! 122: isofseblk = atoi(optarg);
! 123: break;
! 124: default:
! 125: usage();
! 126: }
! 127: }
! 128:
! 129: if (argc - optind < 3) {
! 130: usage();
! 131: }
! 132:
! 133: boot = argv[optind];
! 134: proto = argv[optind + 1];
! 135: dev = argv[optind + 2];
! 136:
! 137: if (karch == NULL) {
! 138: mib[0] = CTL_HW;
! 139: mib[1] = HW_MODEL;
! 140: size = sizeof(cpumodel);
! 141: if (sysctl(mib, 2, cpumodel, &size, NULL, 0) == -1)
! 142: err(1, "sysctl");
! 143:
! 144: if (size < 5 || strncmp(cpumodel, "SUN-4", 5) != 0) /*XXX*/
! 145: /* Assume a sun4c/sun4m */
! 146: karch = "sun4c";
! 147: else
! 148: karch = "sun4";
! 149: }
! 150:
! 151: if (verbose) {
! 152: printf("boot: %s\n", boot);
! 153: printf("proto: %s\n", proto);
! 154: printf("device: %s\n", dev);
! 155: printf("architecture: %s\n", karch);
! 156: }
! 157:
! 158: if (strcmp(karch, "sun4") == 0) {
! 159: hflag = 0;
! 160: } else if (strcmp(karch, "sun4c") == 0) {
! 161: hflag = 1;
! 162: } else if (strcmp(karch, "sun4m") == 0) {
! 163: hflag = 1;
! 164: } else
! 165: errx(1, "Unsupported architecture");
! 166:
! 167: /* Load proto blocks into core */
! 168: if ((protostore = loadprotoblocks(proto, &protosize)) == NULL)
! 169: exit(1);
! 170:
! 171: /* Open and check raw disk device */
! 172: if ((devfd = open(dev, O_RDONLY, 0)) < 0)
! 173: err(1, "open: %s", dev);
! 174:
! 175: /* Extract and load block numbers */
! 176: if (loadblocknums(boot, devfd) != 0)
! 177: exit(1);
! 178:
! 179: (void)close(devfd);
! 180:
! 181: if (nowrite)
! 182: return 0;
! 183:
! 184: /* Write patched proto bootblocks into the superblock */
! 185: if (protosize > SBSIZE - DEV_BSIZE)
! 186: errx(1, "proto bootblocks too big");
! 187:
! 188: if ((devfd = open(dev, O_RDWR, 0)) < 0)
! 189: err(1, "open: %s", dev);
! 190:
! 191: if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE)
! 192: err(1, "lseek bootstrap");
! 193:
! 194: /* Sync filesystems (to clean in-memory superblock?) */
! 195: sync();
! 196:
! 197: if (write(devfd, protostore, protosize) != protosize)
! 198: err(1, "write bootstrap");
! 199: (void)close(devfd);
! 200: return 0;
! 201: }
! 202:
! 203: char *
! 204: loadprotoblocks(fname, size)
! 205: char *fname;
! 206: long *size;
! 207: {
! 208: int fd, sz;
! 209: char *bp;
! 210: struct stat statbuf;
! 211: struct exec *hp;
! 212: long off;
! 213:
! 214: /* Locate block number array in proto file */
! 215: if (nlist(fname, nl) != 0) {
! 216: warnx("nlist: %s: symbols not found", fname);
! 217: return NULL;
! 218: }
! 219: if (nl[X_BLOCKTABLE].n_type != N_DATA + N_EXT) {
! 220: warnx("nlist: %s: wrong type", nl[X_BLOCKTABLE].n_un.n_name);
! 221: return NULL;
! 222: }
! 223: if (nl[X_BLOCKCOUNT].n_type != N_DATA + N_EXT) {
! 224: warnx("nlist: %s: wrong type", nl[X_BLOCKCOUNT].n_un.n_name);
! 225: return NULL;
! 226: }
! 227: if (nl[X_BLOCKSIZE].n_type != N_DATA + N_EXT) {
! 228: warnx("nlist: %s: wrong type", nl[X_BLOCKSIZE].n_un.n_name);
! 229: return NULL;
! 230: }
! 231:
! 232: if ((fd = open(fname, O_RDONLY)) < 0) {
! 233: warn("open: %s", fname);
! 234: return NULL;
! 235: }
! 236: if (fstat(fd, &statbuf) != 0) {
! 237: warn("fstat: %s", fname);
! 238: close(fd);
! 239: return NULL;
! 240: }
! 241: if ((bp = calloc(roundup(statbuf.st_size, DEV_BSIZE), 1)) == NULL) {
! 242: warnx("malloc: %s: no memory", fname);
! 243: close(fd);
! 244: return NULL;
! 245: }
! 246: if (read(fd, bp, statbuf.st_size) != statbuf.st_size) {
! 247: warn("read: %s", fname);
! 248: free(bp);
! 249: close(fd);
! 250: return NULL;
! 251: }
! 252: close(fd);
! 253:
! 254: hp = (struct exec *)bp;
! 255: sz = (hflag ? sizeof(*hp) : 0) + hp->a_text + hp->a_data;
! 256: sz = roundup(sz, DEV_BSIZE);
! 257:
! 258: /* Calculate the symbols' location within the proto file */
! 259: off = N_DATOFF(*hp) - N_DATADDR(*hp) - (hp->a_entry - N_TXTADDR(*hp));
! 260: block_table = (daddr_t *) (bp + nl[X_BLOCKTABLE].n_value + off);
! 261: block_count_p = (int32_t *)(bp + nl[X_BLOCKCOUNT].n_value + off);
! 262: block_size_p = (int32_t *) (bp + nl[X_BLOCKSIZE].n_value + off);
! 263: if ((int)block_table & 3) {
! 264: warn("%s: invalid address: block_table = %x",
! 265: fname, block_table);
! 266: free(bp);
! 267: close(fd);
! 268: return NULL;
! 269: }
! 270: if ((int)block_count_p & 3) {
! 271: warn("%s: invalid address: block_count_p = %x",
! 272: fname, block_count_p);
! 273: free(bp);
! 274: close(fd);
! 275: return NULL;
! 276: }
! 277: if ((int)block_size_p & 3) {
! 278: warn("%s: invalid address: block_size_p = %x",
! 279: fname, block_size_p);
! 280: free(bp);
! 281: close(fd);
! 282: return NULL;
! 283: }
! 284: max_block_count = *block_count_p;
! 285:
! 286: if (verbose) {
! 287: printf("%s: entry point %#x\n", fname, hp->a_entry);
! 288: printf("%s: a.out header %s\n", fname,
! 289: hflag?"left on":"stripped off");
! 290: printf("proto bootblock size %ld\n", sz);
! 291: printf("room for %d filesystem blocks at %#x\n",
! 292: max_block_count, nl[X_BLOCKTABLE].n_value);
! 293: }
! 294:
! 295: /*
! 296: * We convert the a.out header in-vitro into something that
! 297: * Sun PROMs understand.
! 298: * Old-style (sun4) ROMs do not expect a header at all, so
! 299: * we turn the first two words into code that gets us past
! 300: * the 32-byte header where the actual code begins. In assembly
! 301: * speak:
! 302: * .word MAGIC ! a NOP
! 303: * ba,a start !
! 304: * .skip 24 ! pad
! 305: * start:
! 306: */
! 307:
! 308: #define SUN_MAGIC 0x01030107
! 309: #define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
! 310: *((int *)bp) = SUN_MAGIC;
! 311: *((int *)bp + 1) = SUN4_BASTART;
! 312:
! 313: *size = sz;
! 314: return (hflag ? bp : (bp + sizeof(struct exec)));
! 315: }
! 316:
! 317: static void
! 318: devread(fd, buf, blk, size, msg)
! 319: int fd;
! 320: void *buf;
! 321: daddr_t blk;
! 322: size_t size;
! 323: char *msg;
! 324: {
! 325: if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk))
! 326: err(1, "%s: devread: lseek", msg);
! 327:
! 328: if (read(fd, buf, size) != size)
! 329: err(1, "%s: devread: read", msg);
! 330: }
! 331:
! 332: static char sblock[SBSIZE];
! 333:
! 334: int
! 335: loadblocknums(boot, devfd)
! 336: char *boot;
! 337: int devfd;
! 338: {
! 339: int i, fd;
! 340: struct stat statbuf;
! 341: struct statfs statfsbuf;
! 342: struct fs *fs;
! 343: char *buf;
! 344: daddr_t blk, *ap;
! 345: struct ufs1_dinode *ip;
! 346: int ndb;
! 347:
! 348: /*
! 349: * Open 2nd-level boot program and record the block numbers
! 350: * it occupies on the filesystem represented by `devfd'.
! 351: */
! 352: if ((fd = open(boot, O_RDONLY)) < 0)
! 353: err(1, "open: %s", boot);
! 354:
! 355: if (fstatfs(fd, &statfsbuf) != 0)
! 356: err(1, "statfs: %s", boot);
! 357:
! 358: if (isofsblk) {
! 359: int i;
! 360:
! 361: *block_size_p = 512;
! 362: *block_count_p = (isofseblk - isofsblk + 1) * (2048/512);
! 363: if (*block_count_p > max_block_count)
! 364: errx(1, "%s: Too many blocks", boot);
! 365: if (verbose)
! 366: printf("%s: %d block numbers: ", boot, *block_count_p);
! 367: for (i = 0; i < *block_count_p; i++) {
! 368: blk = (isofsblk * (2048/512)) + i;
! 369: block_table[i] = blk;
! 370: if (verbose)
! 371: printf("%d ", blk);
! 372: }
! 373: if (verbose)
! 374: printf("\n");
! 375: return 0;
! 376: }
! 377:
! 378: if (strncmp(statfsbuf.f_fstypename, "ffs", MFSNAMELEN) &&
! 379: strncmp(statfsbuf.f_fstypename, "ufs", MFSNAMELEN)) {
! 380: errx(1, "%s: must be on an FFS filesystem", boot);
! 381: }
! 382:
! 383: if (fsync(fd) != 0)
! 384: err(1, "fsync: %s", boot);
! 385:
! 386: if (fstat(fd, &statbuf) != 0)
! 387: err(1, "fstat: %s", boot);
! 388:
! 389: close(fd);
! 390:
! 391: /* Read superblock */
! 392: devread(devfd, sblock, btodb(SBOFF), SBSIZE, "superblock");
! 393: fs = (struct fs *)sblock;
! 394:
! 395: /* Read inode */
! 396: if ((buf = malloc(fs->fs_bsize)) == NULL)
! 397: errx(1, "No memory for filesystem block");
! 398:
! 399: blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino));
! 400: devread(devfd, buf, blk, fs->fs_bsize, "inode");
! 401: ip = (struct ufs1_dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino);
! 402:
! 403: /*
! 404: * Register filesystem block size.
! 405: */
! 406: *block_size_p = fs->fs_bsize;
! 407:
! 408: /*
! 409: * Get the block numbers; we don't handle fragments
! 410: */
! 411: ndb = howmany(ip->di_size, fs->fs_bsize);
! 412: if (ndb > max_block_count)
! 413: errx(1, "%s: Too many blocks", boot);
! 414:
! 415: /*
! 416: * Register block count.
! 417: */
! 418: *block_count_p = ndb;
! 419:
! 420: if (verbose)
! 421: printf("%s: block numbers: ", boot);
! 422: ap = ip->di_db;
! 423: for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) {
! 424: blk = fsbtodb(fs, *ap);
! 425: block_table[i] = blk;
! 426: if (verbose)
! 427: printf("%d ", blk);
! 428: }
! 429: if (verbose)
! 430: printf("\n");
! 431:
! 432: if (ndb == 0)
! 433: return 0;
! 434:
! 435: /*
! 436: * Just one level of indirections; there isn't much room
! 437: * for more in the 1st-level bootblocks anyway.
! 438: */
! 439: if (verbose)
! 440: printf("%s: block numbers (indirect): ", boot);
! 441: blk = ip->di_ib[0];
! 442: devread(devfd, buf, blk, fs->fs_bsize, "indirect block");
! 443: ap = (daddr_t *)buf;
! 444: for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) {
! 445: blk = fsbtodb(fs, *ap);
! 446: block_table[i] = blk;
! 447: if (verbose)
! 448: printf("%d ", blk);
! 449: }
! 450: if (verbose)
! 451: printf("\n");
! 452:
! 453: if (ndb)
! 454: errx(1, "%s: Too many blocks", boot);
! 455: return 0;
! 456: }
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