/* $OpenBSD: installboot.c,v 1.10 2014/07/12 19:01:49 tedu Exp $ */ /* $NetBSD: installboot.c,v 1.1 1997/06/01 03:39:45 mrg Exp $ */ /* * Copyright (c) 1994 Paul Kranenburg * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Paul Kranenburg. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int verbose, nowrite, hflag; char *boot, *proto, *dev; struct nlist nl[] = { #define X_BLOCKTABLE 0 {"_block_table"}, #define X_BLOCKCOUNT 1 {"_block_count"}, #define X_BLOCKSIZE 2 {"_block_size"}, {NULL} }; daddr32_t *block_table; /* block number array in prototype image */ int32_t *block_count_p; /* size of this array */ int32_t *block_size_p; /* filesystem block size */ int32_t max_block_count; char *karch; char cpumodel[130]; int isofsblk = 0; int isofseblk = 0; char *loadprotoblocks(char *, long *); int loadblocknums(char *, int); static void devread(int, void *, daddr32_t, size_t, char *); static void usage(void); int main(int, char *[]); static void usage() { fprintf(stderr, "usage: installboot [-hnv] [-a karch] [-s isofsblk -e isofseblk] boot bootxx rawdev\n"); exit(1); } int main(argc, argv) int argc; char *argv[]; { int c; int devfd; char *protostore; long protosize; int mib[2]; size_t size; while ((c = getopt(argc, argv, "a:vnhs:e:")) != -1) { switch (c) { case 'a': karch = optarg; break; case 'h': /* Note: for backwards compatibility */ /* Don't strip a.out header */ hflag = 1; break; case 'n': /* Do not actually write the bootblock to disk */ nowrite = 1; break; case 'v': /* Chat */ verbose = 1; break; case 's': isofsblk = atoi(optarg); break; case 'e': isofseblk = atoi(optarg); break; default: usage(); } } if (argc - optind < 3) { usage(); } boot = argv[optind]; proto = argv[optind + 1]; dev = argv[optind + 2]; if (karch == NULL) { mib[0] = CTL_HW; mib[1] = HW_MODEL; size = sizeof(cpumodel); if (sysctl(mib, 2, cpumodel, &size, NULL, 0) == -1) err(1, "sysctl"); if (size < 5 || strncmp(cpumodel, "SUN-4", 5) != 0) /*XXX*/ /* Assume a sun4c/sun4m */ karch = "sun4c"; else karch = "sun4"; } if (verbose) { printf("boot: %s\n", boot); printf("proto: %s\n", proto); printf("device: %s\n", dev); printf("architecture: %s\n", karch); } if (strcmp(karch, "sun4") == 0) { hflag = 0; } else if (strcmp(karch, "sun4c") == 0) { hflag = 1; } else if (strcmp(karch, "sun4m") == 0) { hflag = 1; } else errx(1, "Unsupported architecture"); /* Load proto blocks into core */ if ((protostore = loadprotoblocks(proto, &protosize)) == NULL) exit(1); /* Open and check raw disk device */ if ((devfd = open(dev, O_RDONLY, 0)) < 0) err(1, "open: %s", dev); /* Extract and load block numbers */ if (loadblocknums(boot, devfd) != 0) exit(1); (void)close(devfd); if (nowrite) return 0; /* Write patched proto bootblocks into the superblock */ if (protosize > SBSIZE - DEV_BSIZE) errx(1, "proto bootblocks too big"); if ((devfd = open(dev, O_RDWR, 0)) < 0) err(1, "open: %s", dev); if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE) err(1, "lseek bootstrap"); /* Sync filesystems (to clean in-memory superblock?) */ sync(); if (write(devfd, protostore, protosize) != protosize) err(1, "write bootstrap"); (void)close(devfd); return 0; } char * loadprotoblocks(fname, size) char *fname; long *size; { int fd, sz; char *bp; struct stat statbuf; struct exec *hp; long off; /* Locate block number array in proto file */ if (nlist(fname, nl) != 0) { warnx("nlist: %s: symbols not found", fname); return NULL; } if (nl[X_BLOCKTABLE].n_type != N_DATA + N_EXT) { warnx("nlist: %s: wrong type", nl[X_BLOCKTABLE].n_un.n_name); return NULL; } if (nl[X_BLOCKCOUNT].n_type != N_DATA + N_EXT) { warnx("nlist: %s: wrong type", nl[X_BLOCKCOUNT].n_un.n_name); return NULL; } if (nl[X_BLOCKSIZE].n_type != N_DATA + N_EXT) { warnx("nlist: %s: wrong type", nl[X_BLOCKSIZE].n_un.n_name); return NULL; } if ((fd = open(fname, O_RDONLY)) < 0) { warn("open: %s", fname); return NULL; } if (fstat(fd, &statbuf) != 0) { warn("fstat: %s", fname); close(fd); return NULL; } if (statbuf.st_size == 0) { warn("%s is empty", fname); close(fd); return NULL; } if ((bp = calloc(roundup(statbuf.st_size, DEV_BSIZE), 1)) == NULL) { warnx("malloc: %s: no memory", fname); close(fd); return NULL; } if (read(fd, bp, statbuf.st_size) != statbuf.st_size) { warn("read: %s", fname); free(bp); close(fd); return NULL; } close(fd); hp = (struct exec *)bp; sz = (hflag ? sizeof(*hp) : 0) + hp->a_text + hp->a_data; sz = roundup(sz, DEV_BSIZE); /* Calculate the symbols' location within the proto file */ off = N_DATOFF(*hp) - N_DATADDR(*hp) - (hp->a_entry - N_TXTADDR(*hp)); block_table = (daddr32_t *) (bp + nl[X_BLOCKTABLE].n_value + off); block_count_p = (int32_t *)(bp + nl[X_BLOCKCOUNT].n_value + off); block_size_p = (int32_t *) (bp + nl[X_BLOCKSIZE].n_value + off); if ((int)block_table & 3) { warn("%s: invalid address: block_table = %x", fname, block_table); free(bp); close(fd); return NULL; } if ((int)block_count_p & 3) { warn("%s: invalid address: block_count_p = %x", fname, block_count_p); free(bp); close(fd); return NULL; } if ((int)block_size_p & 3) { warn("%s: invalid address: block_size_p = %x", fname, block_size_p); free(bp); close(fd); return NULL; } max_block_count = *block_count_p; if (verbose) { printf("%s: entry point %#x\n", fname, hp->a_entry); printf("%s: a.out header %s\n", fname, hflag?"left on":"stripped off"); printf("proto bootblock size %ld\n", sz); printf("room for %d filesystem blocks at %#x\n", max_block_count, nl[X_BLOCKTABLE].n_value); } /* * We convert the a.out header in-vitro into something that * Sun PROMs understand. * Old-style (sun4) ROMs do not expect a header at all, so * we turn the first two words into code that gets us past * the 32-byte header where the actual code begins. In assembly * speak: * .word MAGIC ! a NOP * ba,a start ! * .skip 24 ! pad * start: */ #define SUN_MAGIC 0x01030107 #define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */ *((int *)bp) = SUN_MAGIC; *((int *)bp + 1) = SUN4_BASTART; *size = sz; return (hflag ? bp : (bp + sizeof(struct exec))); } static void devread(fd, buf, blk, size, msg) int fd; void *buf; daddr32_t blk; size_t size; char *msg; { if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk)) err(1, "%s: devread: lseek", msg); if (read(fd, buf, size) != size) err(1, "%s: devread: read", msg); } static char sblock[SBSIZE]; int loadblocknums(boot, devfd) char *boot; int devfd; { int i, fd; struct stat statbuf; struct statfs statfsbuf; struct fs *fs; char *buf; daddr32_t blk, *ap; struct ufs1_dinode *ip; int ndb; /* * Open 2nd-level boot program and record the block numbers * it occupies on the filesystem represented by `devfd'. */ if ((fd = open(boot, O_RDONLY)) < 0) err(1, "open: %s", boot); if (fstatfs(fd, &statfsbuf) != 0) err(1, "statfs: %s", boot); if (isofsblk) { int i; *block_size_p = 512; *block_count_p = (isofseblk - isofsblk + 1) * (2048/512); if (*block_count_p > max_block_count) errx(1, "%s: Too many blocks", boot); if (verbose) printf("%s: %d block numbers: ", boot, *block_count_p); for (i = 0; i < *block_count_p; i++) { blk = (isofsblk * (2048/512)) + i; block_table[i] = blk; if (verbose) printf("%d ", blk); } if (verbose) printf("\n"); return 0; } if (strncmp(statfsbuf.f_fstypename, "ffs", MFSNAMELEN) && strncmp(statfsbuf.f_fstypename, "ufs", MFSNAMELEN)) { errx(1, "%s: must be on an FFS filesystem", boot); } if (fsync(fd) != 0) err(1, "fsync: %s", boot); if (fstat(fd, &statbuf) != 0) err(1, "fstat: %s", boot); close(fd); /* Read superblock */ devread(devfd, sblock, btodb(SBOFF), SBSIZE, "superblock"); fs = (struct fs *)sblock; /* Read inode */ if ((buf = malloc(fs->fs_bsize)) == NULL) errx(1, "No memory for filesystem block"); blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino)); devread(devfd, buf, blk, fs->fs_bsize, "inode"); ip = (struct ufs1_dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino); /* * Register filesystem block size. */ *block_size_p = fs->fs_bsize; /* * Get the block numbers; we don't handle fragments */ ndb = howmany(ip->di_size, fs->fs_bsize); if (ndb > max_block_count) errx(1, "%s: Too many blocks", boot); /* * Register block count. */ *block_count_p = ndb; if (verbose) printf("%s: block numbers: ", boot); ap = ip->di_db; for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) { blk = fsbtodb(fs, *ap); block_table[i] = blk; if (verbose) printf("%d ", blk); } if (verbose) printf("\n"); if (ndb == 0) return 0; /* * Just one level of indirections; there isn't much room * for more in the 1st-level bootblocks anyway. */ if (verbose) printf("%s: block numbers (indirect): ", boot); blk = ip->di_ib[0]; devread(devfd, buf, blk, fs->fs_bsize, "indirect block"); ap = (daddr32_t *)buf; for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) { blk = fsbtodb(fs, *ap); block_table[i] = blk; if (verbose) printf("%d ", blk); } if (verbose) printf("\n"); if (ndb) errx(1, "%s: Too many blocks", boot); return 0; }