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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: }