1 /* $NetBSD: vax.c,v 1.18 2014/11/13 16:02:25 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Simon Burge.
9 *
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Luke Mewburn of Wasabi Systems.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 /*
36 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 * must display the following acknowledgement:
48 * This product includes software developed by Christopher G. Demetriou
49 * for the NetBSD Project.
50 * 4. The name of the author may not be used to endorse or promote products
51 * derived from this software without specific prior written permission
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
54 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
55 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
56 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
57 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
58 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
62 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 */
64
65 #if HAVE_NBTOOL_CONFIG_H
66 #include "nbtool_config.h"
67 #endif
68
69 #include <sys/cdefs.h>
70 #if !defined(__lint)
71 __RCSID("$NetBSD: vax.c,v 1.18 2014/11/13 16:02:25 christos Exp $");
72 #endif /* !__lint */
73
74 #include <sys/param.h>
75 #ifdef HAVE_NBTOOL_CONFIG_H
76 #include <nbinclude/vax/disklabel.h>
77 #else
78 #include <sys/disklabel.h>
79 #endif
80
81 #include <assert.h>
82 #include <err.h>
83 #include <stddef.h>
84 #include <stdio.h>
85 #include <stdlib.h>
86 #include <string.h>
87 #include <unistd.h>
88
89 #include "installboot.h"
90
91 #define VAX_LABELOFFSET 64
92
93 #ifndef __CTASSERT
94 #define __CTASSERT(X)
95 #endif
96
97 static int load_bootstrap(ib_params *, char **,
98 uint32_t *, uint32_t *, size_t *);
99
100 static int vax_clearboot(ib_params *);
101 static int vax_setboot(ib_params *);
102
103 struct ib_mach ib_mach_vax =
104 { "vax", vax_setboot, vax_clearboot, no_editboot,
105 IB_STAGE1START | IB_APPEND | IB_SUNSUM };
106
107 static int
vax_clearboot(ib_params * params)108 vax_clearboot(ib_params *params)
109 {
110 struct vax_boot_block bb;
111 ssize_t rv;
112
113 assert(params != NULL);
114 assert(params->fsfd != -1);
115 assert(params->filesystem != NULL);
116 __CTASSERT(sizeof(bb)==VAX_BOOT_BLOCK_BLOCKSIZE);
117
118 rv = pread(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET);
119 if (rv == -1) {
120 warn("Reading `%s'", params->filesystem);
121 return (0);
122 } else if (rv != sizeof(bb)) {
123 warnx("Reading `%s': short read", params->filesystem);
124 return (0);
125 }
126
127 if (bb.bb_id_offset*2 >= VAX_BOOT_BLOCK_BLOCKSIZE
128 || bb.bb_magic1 != VAX_BOOT_MAGIC1) {
129 warnx(
130 "Old boot block magic number invalid; boot block invalid");
131 return (0);
132 }
133
134 bb.bb_id_offset = 1;
135 bb.bb_mbone = 0;
136 bb.bb_lbn_hi = 0;
137 bb.bb_lbn_low = 0;
138
139 if (params->flags & IB_SUNSUM) {
140 uint16_t sum;
141
142 sum = compute_sunsum((uint16_t *)&bb);
143 if (! set_sunsum(params, (uint16_t *)&bb, sum))
144 return (0);
145 }
146
147 if (params->flags & IB_VERBOSE)
148 printf("%slearing boot block\n",
149 (params->flags & IB_NOWRITE) ? "Not c" : "C");
150 if (params->flags & IB_NOWRITE)
151 return (1);
152
153 rv = pwrite(params->fsfd, &bb, sizeof(bb), VAX_BOOT_BLOCK_OFFSET);
154 if (rv == -1) {
155 warn("Writing `%s'", params->filesystem);
156 return (0);
157 } else if (rv != sizeof(bb)) {
158 warnx("Writing `%s': short write", params->filesystem);
159 return (0);
160 }
161
162 return (1);
163 }
164
165 static int
vax_setboot(ib_params * params)166 vax_setboot(ib_params *params)
167 {
168 struct stat bootstrapsb;
169 struct vax_boot_block *bb;
170 uint32_t startblock;
171 int retval;
172 char *bootstrapbuf, oldbb[VAX_BOOT_BLOCK_BLOCKSIZE];
173 size_t bootstrapsize;
174 uint32_t bootstrapload, bootstrapexec;
175 ssize_t rv;
176
177 assert(params != NULL);
178 assert(params->fsfd != -1);
179 assert(params->filesystem != NULL);
180 assert(params->s1fd != -1);
181 assert(params->stage1 != NULL);
182
183 /* see sys/arch/vax/boot/xxboot/start.S for explanation */
184 __CTASSERT(offsetof(struct vax_boot_block,bb_magic1) == 0x19e);
185 __CTASSERT(sizeof(struct vax_boot_block) == VAX_BOOT_BLOCK_BLOCKSIZE);
186
187 startblock = 0;
188 retval = 0;
189 bootstrapbuf = NULL;
190
191 if (fstat(params->s1fd, &bootstrapsb) == -1) {
192 warn("Examining `%s'", params->stage1);
193 goto done;
194 }
195 if (!S_ISREG(bootstrapsb.st_mode)) {
196 warnx("`%s' must be a regular file", params->stage1);
197 goto done;
198 }
199 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload,
200 &bootstrapexec, &bootstrapsize))
201 goto done;
202
203 /* read old boot block */
204 rv = pread(params->fsfd, oldbb, sizeof(oldbb), VAX_BOOT_BLOCK_OFFSET);
205 if (rv == -1) {
206 warn("Reading `%s'", params->filesystem);
207 goto done;
208 } else if (rv != sizeof(oldbb)) {
209 warnx("Reading `%s': short read", params->filesystem);
210 goto done;
211 }
212
213 /*
214 * Copy disklabel from old boot block to new.
215 * Assume everything between VAX_LABELOFFSET and the start of
216 * the param block is scratch area and can be copied over.
217 */
218 memcpy(bootstrapbuf + VAX_LABELOFFSET,
219 oldbb + VAX_LABELOFFSET,
220 offsetof(struct vax_boot_block,bb_magic1) - VAX_LABELOFFSET);
221
222 /* point to bootblock at begining of bootstrap */
223 bb = (struct vax_boot_block*)bootstrapbuf;
224
225 /* fill in the updated boot block fields */
226 if (params->flags & IB_APPEND) {
227 struct stat filesyssb;
228
229 if (fstat(params->fsfd, &filesyssb) == -1) {
230 warn("Examining `%s'", params->filesystem);
231 goto done;
232 }
233 if (!S_ISREG(filesyssb.st_mode)) {
234 warnx(
235 "`%s' must be a regular file to append a bootstrap",
236 params->filesystem);
237 goto done;
238 }
239 startblock = howmany(filesyssb.st_size,
240 VAX_BOOT_BLOCK_BLOCKSIZE);
241 bb->bb_lbn_hi = htole16((uint16_t) (startblock >> 16));
242 bb->bb_lbn_low = htole16((uint16_t) (startblock >> 0));
243 }
244
245 if (params->flags & IB_SUNSUM) {
246 uint16_t sum;
247
248 sum = compute_sunsum((uint16_t *)bb);
249 if (! set_sunsum(params, (uint16_t *)bb, sum))
250 goto done;
251 }
252
253 if (params->flags & IB_VERBOSE) {
254 printf("Bootstrap start sector: %u\n", startblock);
255 printf("Bootstrap sector count: %u\n", le32toh(bb->bb_size));
256 printf("%sriting bootstrap\n",
257 (params->flags & IB_NOWRITE) ? "Not w" : "W");
258 }
259 if (params->flags & IB_NOWRITE) {
260 retval = 1;
261 goto done;
262 }
263 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize, 0);
264 if (rv == -1) {
265 warn("Writing `%s'", params->filesystem);
266 goto done;
267 } else if ((size_t)rv != bootstrapsize) {
268 warnx("Writing `%s': short write", params->filesystem);
269 goto done;
270 }
271 retval = 1;
272
273 done:
274 if (bootstrapbuf)
275 free(bootstrapbuf);
276 return (retval);
277 }
278
279 static int
load_bootstrap(ib_params * params,char ** data,uint32_t * loadaddr,uint32_t * execaddr,size_t * len)280 load_bootstrap(ib_params *params, char **data,
281 uint32_t *loadaddr, uint32_t *execaddr, size_t *len)
282 {
283 ssize_t cc;
284 size_t buflen;
285
286 buflen = 512 * (VAX_BOOT_SIZE + 1);
287 *data = malloc(buflen);
288 if (*data == NULL) {
289 warn("Allocating %lu bytes", (unsigned long) buflen);
290 return (0);
291 }
292
293 cc = pread(params->s1fd, *data, buflen, 0);
294 if (cc <= 0) {
295 warn("Reading `%s'", params->stage1);
296 return (0);
297 }
298 if (cc > 512 * VAX_BOOT_SIZE) {
299 warnx("`%s': too large", params->stage1);
300 return (0);
301 }
302
303 *len = roundup(cc, VAX_BOOT_BLOCK_BLOCKSIZE);
304 *loadaddr = VAX_BOOT_LOAD;
305 *execaddr = VAX_BOOT_ENTRY;
306 return (1);
307 }
308