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1.1 nbrk 1: /* $OpenBSD: installboot.c,v 1.6 2004/06/24 16:31:02 deraadt Exp $ */
2: /* $NetBSD: installboot.c,v 1.8 2001/02/19 22:48:59 cgd Exp $ */
3:
4: /*-
5: * Copyright (c) 1998 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Paul Kranenburg.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the NetBSD
22: * Foundation, Inc. and its contributors.
23: * 4. Neither the name of The NetBSD Foundation nor the names of its
24: * contributors may be used to endorse or promote products derived
25: * from this software without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37: * POSSIBILITY OF SUCH DAMAGE.
38: */
39:
40: #include <sys/param.h>
41: #include <sys/mount.h>
42: #include <sys/time.h>
43: #include <sys/stat.h>
44: #include <sys/sysctl.h>
45: #include <sys/mman.h>
46: #include <sys/utsname.h>
47: #include <ufs/ufs/dinode.h>
48: #include <ufs/ufs/dir.h>
49: #include <ufs/ffs/fs.h>
50: #include <err.h>
51: #include <a.out.h>
52: #include <fcntl.h>
53: #include <nlist.h>
54: #include <stdlib.h>
55: #include <stdio.h>
56: #include <string.h>
57: #include <unistd.h>
58:
59: #include "loadfile.h"
60:
61: int verbose, nowrite, sparc64, uflag, hflag = 1;
62: char *boot, *proto, *dev;
63:
64: #if 0
65: #ifdef __ELF__
66: #define SYMNAME(a) a
67: #else
68: #define SYMNAME(a) __CONCAT("_",a)
69: #endif
70: #else
71: /* XXX: Hack in libc nlist works with both formats */
72: #define SYMNAME(a) "_"a
73: #endif
74:
75: struct nlist nl[] = {
76: #define X_BLOCKTABLE 0
77: { {SYMNAME("block_table")} },
78: #define X_BLOCKCOUNT 1
79: { {SYMNAME("block_count")} },
80: #define X_BLOCKSIZE 2
81: { {SYMNAME("block_size")} },
82: { {NULL} }
83: };
84: daddr_t *block_table; /* block number array in prototype image */
85: int32_t *block_count_p; /* size of this array */
86: int32_t *block_size_p; /* filesystem block size */
87: int32_t max_block_count;
88:
89: char *loadprotoblocks(char *, size_t *);
90: int loadblocknums(char *, int);
91: static void devread(int, void *, daddr_t, size_t, char *);
92: static void usage(void);
93: int main(int, char *[]);
94:
95: static void
96: usage()
97: {
98: extern char *__progname;
99: const char *progname = __progname;
100:
101: if (sparc64)
102: (void)fprintf(stderr,
103: "Usage: %s [-nv] <bootblk> <device>\n"
104: " %s -U [-nv] <boot> <proto> <device>\n",
105: progname, progname);
106: else
107: (void)fprintf(stderr,
108: "Usage: %s [-nv] <boot> <proto> <device>\n"
109: " %s -u [-n] [-v] <bootblk> <device>\n",
110: progname, progname);
111: exit(1);
112: }
113:
114: int
115: main(argc, argv)
116: int argc;
117: char *argv[];
118: {
119: int c;
120: int devfd;
121: char *protostore;
122: size_t protosize;
123: struct utsname utsname;
124:
125: /*
126: * For UltraSPARC machines, we turn on the uflag by default.
127: */
128: if (uname(&utsname) == -1)
129: err(1, "uname");
130: if (strcmp(utsname.machine, "sparc64") == 0)
131: sparc64 = uflag = 1;
132:
133: while ((c = getopt(argc, argv, "a:nhuUv")) != -1) {
134: switch (c) {
135: case 'a':
136: warnx("-a option is obsolete");
137: break;
138: case 'h': /* Note: for backwards compatibility */
139: /* Don't strip a.out header */
140: warnx("-h option is obsolete");
141: break;
142: case 'n':
143: /* Do not actually write the bootblock to disk */
144: nowrite = 1;
145: break;
146: case 'u':
147: /* UltraSPARC boot block */
148: uflag = 1;
149: break;
150: case 'U':
151: /* Force non-ultrasparc */
152: uflag = 0;
153: break;
154: case 'v':
155: /* Chat */
156: verbose = 1;
157: break;
158: default:
159: usage();
160: }
161: }
162:
163: if (uflag) {
164: if (argc - optind < 2)
165: usage();
166: } else {
167: if (argc - optind < 3)
168: usage();
169: boot = argv[optind++];
170: }
171:
172: proto = argv[optind++];
173: dev = argv[optind];
174:
175: if (verbose) {
176: if (!uflag)
177: printf("boot: %s\n", boot);
178: printf("proto: %s\n", proto);
179: printf("device: %s\n", dev);
180: }
181:
182: /* Load proto blocks into core */
183: if (uflag == 0) {
184: if ((protostore = loadprotoblocks(proto, &protosize)) == NULL)
185: exit(1);
186:
187: /* Open and check raw disk device */
188: if ((devfd = open(dev, O_RDONLY, 0)) < 0)
189: err(1, "open: %s", dev);
190:
191: /* Extract and load block numbers */
192: if (loadblocknums(boot, devfd) != 0)
193: exit(1);
194:
195: (void)close(devfd);
196: } else {
197: struct stat sb;
198: int protofd;
199: size_t blanklen;
200:
201: if ((protofd = open(proto, O_RDONLY)) < 0)
202: err(1, "open: %s", proto);
203:
204: if (fstat(protofd, &sb) < 0)
205: err(1, "fstat: %s", proto);
206:
207: /* there must be a better way */
208: blanklen = DEV_BSIZE - ((sb.st_size + DEV_BSIZE) & (DEV_BSIZE - 1));
209: protosize = sb.st_size + blanklen;
210: if ((protostore = mmap(0, (size_t)protosize,
211: PROT_READ|PROT_WRITE, MAP_PRIVATE,
212: protofd, 0)) == MAP_FAILED)
213: err(1, "mmap: %s", proto);
214: /* and provide the rest of the block */
215: if (blanklen)
216: memset(protostore + sb.st_size, 0, blanklen);
217: }
218:
219: if (nowrite)
220: return 0;
221:
222: /* Write patched proto bootblocks into the superblock */
223: if (protosize > SBSIZE - DEV_BSIZE)
224: errx(1, "proto bootblocks too big");
225:
226: if ((devfd = open(dev, O_RDWR, 0)) < 0)
227: err(1, "open: %s", dev);
228:
229: if (lseek(devfd, DEV_BSIZE, SEEK_SET) != DEV_BSIZE)
230: err(1, "lseek bootstrap");
231:
232: /* Sync filesystems (to clean in-memory superblock?) */
233: sync();
234:
235: if (write(devfd, protostore, protosize) != protosize)
236: err(1, "write bootstrap");
237: (void)close(devfd);
238: return 0;
239: }
240:
241: char *
242: loadprotoblocks(fname, size)
243: char *fname;
244: size_t *size;
245: {
246: int fd, sz;
247: u_long ap, bp, st, en;
248: u_long marks[MARK_MAX];
249:
250: /* Locate block number array in proto file */
251: if (nlist(fname, nl) != 0) {
252: warnx("nlist: %s: symbols not found", fname);
253: return NULL;
254: }
255: if (nl[X_BLOCKTABLE].n_type != N_DATA + N_EXT) {
256: warnx("nlist: %s: wrong type", nl[X_BLOCKTABLE].n_un.n_name);
257: return NULL;
258: }
259: if (nl[X_BLOCKCOUNT].n_type != N_DATA + N_EXT) {
260: warnx("nlist: %s: wrong type", nl[X_BLOCKCOUNT].n_un.n_name);
261: return NULL;
262: }
263: if (nl[X_BLOCKSIZE].n_type != N_DATA + N_EXT) {
264: warnx("nlist: %s: wrong type", nl[X_BLOCKSIZE].n_un.n_name);
265: return NULL;
266: }
267:
268: marks[MARK_START] = 0;
269: if ((fd = loadfile(fname, marks, COUNT_TEXT|COUNT_DATA)) == -1)
270: return NULL;
271: (void)close(fd);
272:
273: sz = (marks[MARK_END] - marks[MARK_START]) + (hflag ? 32 : 0);
274: sz = roundup(sz, DEV_BSIZE);
275: st = marks[MARK_START];
276: en = marks[MARK_ENTRY];
277:
278: if ((ap = (u_long)malloc(sz)) == NULL) {
279: warn("malloc: %s", "");
280: return NULL;
281: }
282:
283: bp = ap + (hflag ? 32 : 0);
284: marks[MARK_START] = bp - st;
285: if ((fd = loadfile(fname, marks, LOAD_TEXT|LOAD_DATA)) == -1) {
286: free((void *)ap);
287: return NULL;
288: }
289: (void)close(fd);
290:
291: block_table = (daddr_t *) (bp + nl[X_BLOCKTABLE].n_value - st);
292: block_count_p = (int32_t *)(bp + nl[X_BLOCKCOUNT].n_value - st);
293: block_size_p = (int32_t *) (bp + nl[X_BLOCKSIZE].n_value - st);
294: if ((int)(u_long)block_table & 3) {
295: warn("%s: invalid address: block_table = %p",
296: fname, block_table);
297: free((void *)ap);
298: return NULL;
299: }
300: if ((int)(u_long)block_count_p & 3) {
301: warn("%s: invalid address: block_count_p = %p",
302: fname, block_count_p);
303: free((void *)ap);
304: return NULL;
305: }
306: if ((int)(u_long)block_size_p & 3) {
307: warn("%s: invalid address: block_size_p = %p",
308: fname, block_size_p);
309: free((void *)ap);
310: return NULL;
311: }
312: max_block_count = *block_count_p;
313:
314: if (verbose) {
315: printf("%s: entry point %#lx\n", fname, en);
316: printf("%s: a.out header %s\n", fname,
317: hflag ? "left on" : "stripped off");
318: printf("proto bootblock size %d\n", sz);
319: printf("room for %d filesystem blocks at %#lx\n",
320: max_block_count, nl[X_BLOCKTABLE].n_value);
321: }
322:
323: if (hflag) {
324: /*
325: * We convert the a.out header in-vitro into something that
326: * Sun PROMs understand.
327: * Old-style (sun4) ROMs do not expect a header at all, so
328: * we turn the first two words into code that gets us past
329: * the 32-byte header where the actual code begins. In assembly
330: * speak:
331: * .word MAGIC ! a NOP
332: * ba,a start !
333: * .skip 24 ! pad
334: * start:
335: */
336: #define SUN_MAGIC 0x01030107
337: #define SUN4_BASTART 0x30800007 /* i.e.: ba,a `start' */
338: *((int *)ap) = SUN_MAGIC;
339: *((int *)ap + 1) = SUN4_BASTART;
340: }
341:
342: *size = sz;
343: return (char *)ap;
344: }
345:
346: static void
347: devread(fd, buf, blk, size, msg)
348: int fd;
349: void *buf;
350: daddr_t blk;
351: size_t size;
352: char *msg;
353: {
354: if (lseek(fd, dbtob(blk), SEEK_SET) != dbtob(blk))
355: err(1, "%s: devread: lseek", msg);
356:
357: if (read(fd, buf, size) != size)
358: err(1, "%s: devread: read", msg);
359: }
360:
361: static char sblock[SBSIZE];
362:
363: int
364: loadblocknums(boot, devfd)
365: char *boot;
366: int devfd;
367: {
368: int i, fd;
369: struct stat statbuf;
370: struct statfs statfsbuf;
371: struct fs *fs;
372: char *buf;
373: daddr_t blk, *ap;
374: struct ufs1_dinode *ip;
375: int ndb;
376:
377: /*
378: * Open 2nd-level boot program and record the block numbers
379: * it occupies on the filesystem represented by `devfd'.
380: */
381: if ((fd = open(boot, O_RDONLY)) < 0)
382: err(1, "open: %s", boot);
383:
384: if (fstatfs(fd, &statfsbuf) != 0)
385: err(1, "statfs: %s", boot);
386:
387: if (strncmp(statfsbuf.f_fstypename, "ffs", MFSNAMELEN) &&
388: strncmp(statfsbuf.f_fstypename, "ufs", MFSNAMELEN)) {
389: errx(1, "%s: must be on an FFS filesystem", boot);
390: }
391:
392: if (fsync(fd) != 0)
393: err(1, "fsync: %s", boot);
394:
395: if (fstat(fd, &statbuf) != 0)
396: err(1, "fstat: %s", boot);
397:
398: close(fd);
399:
400: /* Read superblock */
401: devread(devfd, sblock, btodb(SBOFF), SBSIZE, "superblock");
402: fs = (struct fs *)sblock;
403:
404: /* Read inode */
405: if ((buf = malloc(fs->fs_bsize)) == NULL)
406: errx(1, "No memory for filesystem block");
407:
408: blk = fsbtodb(fs, ino_to_fsba(fs, statbuf.st_ino));
409: devread(devfd, buf, blk, fs->fs_bsize, "inode");
410: ip = (struct ufs1_dinode *)(buf) + ino_to_fsbo(fs, statbuf.st_ino);
411:
412: /*
413: * Register filesystem block size.
414: */
415: *block_size_p = fs->fs_bsize;
416:
417: /*
418: * Get the block numbers; we don't handle fragments
419: */
420: ndb = howmany(ip->di_size, fs->fs_bsize);
421: if (ndb > max_block_count)
422: errx(1, "%s: Too many blocks", boot);
423:
424: /*
425: * Register block count.
426: */
427: *block_count_p = ndb;
428:
429: if (verbose)
430: printf("%s: block numbers: ", boot);
431: ap = ip->di_db;
432: for (i = 0; i < NDADDR && *ap && ndb; i++, ap++, ndb--) {
433: blk = fsbtodb(fs, *ap);
434: block_table[i] = blk;
435: if (verbose)
436: printf("%d ", blk);
437: }
438: if (verbose)
439: printf("\n");
440:
441: if (ndb == 0)
442: return 0;
443:
444: /*
445: * Just one level of indirections; there isn't much room
446: * for more in the 1st-level bootblocks anyway.
447: */
448: if (verbose)
449: printf("%s: block numbers (indirect): ", boot);
450: blk = ip->di_ib[0];
451: devread(devfd, buf, blk, fs->fs_bsize, "indirect block");
452: ap = (daddr_t *)buf;
453: for (; i < NINDIR(fs) && *ap && ndb; i++, ap++, ndb--) {
454: blk = fsbtodb(fs, *ap);
455: block_table[i] = blk;
456: if (verbose)
457: printf("%d ", blk);
458: }
459: if (verbose)
460: printf("\n");
461:
462: if (ndb)
463: errx(1, "%s: Too many blocks", boot);
464: return 0;
465: }