1 /* $NetBSD: pmax.c,v 1.15 2013/10/21 15:37:46 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 Ross Harvey. 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 Ross Harvey
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 /*
66 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
67 *
68 * Redistribution and use in source and binary forms, with or without
69 * modification, are permitted provided that the following conditions
70 * are met:
71 * 1. Redistributions of source code must retain the above copyright
72 * notice, this list of conditions and the following disclaimer.
73 * 2. Redistributions in binary form must reproduce the above copyright
74 * notice, this list of conditions and the following disclaimer in the
75 * documentation and/or other materials provided with the distribution.
76 * 3. All advertising materials mentioning features or use of this software
77 * must display the following acknowledgement:
78 * This product includes software developed by Christopher G. Demetriou
79 * for the NetBSD Project.
80 * 4. The name of the author may not be used to endorse or promote products
81 * derived from this software without specific prior written permission
82 *
83 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
84 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
85 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
86 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
87 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
88 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
89 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
90 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
91 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
92 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
93 */
94
95 #if HAVE_NBTOOL_CONFIG_H
96 #include "nbtool_config.h"
97 #endif
98
99 #include <sys/cdefs.h>
100 #if !defined(__lint)
101 __RCSID("$NetBSD: pmax.c,v 1.15 2013/10/21 15:37:46 christos Exp $");
102 #endif /* !__lint */
103
104 #include <sys/param.h>
105
106 #include <assert.h>
107 #include <err.h>
108 #include <stddef.h>
109 #include <stdio.h>
110 #include <stdlib.h>
111 #include <string.h>
112 #include <unistd.h>
113
114 #include <sys/exec_elf.h>
115
116 #include "installboot.h"
117
118 static int load_bootstrap(ib_params *, char **,
119 uint32_t *, uint32_t *, size_t *);
120
121 static int pmax_clearboot(ib_params *);
122 static int pmax_setboot(ib_params *);
123
124 struct ib_mach ib_mach_pmax =
125 { "pmax", pmax_setboot, pmax_clearboot, no_editboot,
126 IB_STAGE1START | IB_APPEND | IB_SUNSUM };
127
128
129 static int
pmax_clearboot(ib_params * params)130 pmax_clearboot(ib_params *params)
131 {
132 struct pmax_boot_block bb;
133 ssize_t rv;
134
135 assert(params != NULL);
136 assert(params->fsfd != -1);
137 assert(params->filesystem != NULL);
138 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE);
139
140 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET);
141 if (rv == -1) {
142 warn("Reading `%s'", params->filesystem);
143 return (0);
144 } else if (rv != sizeof(bb)) {
145 warnx("Reading `%s': short read", params->filesystem);
146 return (0);
147 }
148
149 if (le32toh(bb.magic) != PMAX_BOOT_MAGIC) {
150 warnx(
151 "Old boot block magic number invalid; boot block invalid");
152 return (0);
153 }
154
155 bb.map[0].num_blocks = bb.map[0].start_block = bb.mode = 0;
156 bb.magic = htole32(PMAX_BOOT_MAGIC);
157
158 if (params->flags & IB_SUNSUM) {
159 uint16_t sum;
160
161 sum = compute_sunsum((uint16_t *)&bb);
162 if (! set_sunsum(params, (uint16_t *)&bb, sum))
163 return (0);
164 }
165
166 if (params->flags & IB_VERBOSE)
167 printf("%slearing boot block\n",
168 (params->flags & IB_NOWRITE) ? "Not c" : "C");
169 if (params->flags & IB_NOWRITE)
170 return (1);
171
172 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET);
173 if (rv == -1) {
174 warn("Writing `%s'", params->filesystem);
175 return (0);
176 } else if (rv != sizeof(bb)) {
177 warnx("Writing `%s': short write", params->filesystem);
178 return (0);
179 }
180
181 return (1);
182 }
183
184 static int
pmax_setboot(ib_params * params)185 pmax_setboot(ib_params *params)
186 {
187 struct pmax_boot_block bb;
188 uint32_t startblock;
189 int retval;
190 char *bootstrapbuf;
191 size_t bootstrapsize = 0; /* XXX: gcc */
192 uint32_t bootstrapload, bootstrapexec;
193 ssize_t rv;
194
195 assert(params != NULL);
196 assert(params->fsfd != -1);
197 assert(params->filesystem != NULL);
198 assert(params->s1fd != -1);
199 assert(params->stage1 != NULL);
200 assert(sizeof(struct pmax_boot_block) == PMAX_BOOT_BLOCK_BLOCKSIZE);
201
202 retval = 0;
203 bootstrapbuf = NULL;
204
205 if (! load_bootstrap(params, &bootstrapbuf, &bootstrapload,
206 &bootstrapexec, &bootstrapsize))
207 goto done;
208
209 rv = pread(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET);
210 if (rv == -1) {
211 warn("Reading `%s'", params->filesystem);
212 goto done;
213 } else if (rv != sizeof(bb)) {
214 warnx("Reading `%s': short read", params->filesystem);
215 goto done;
216 }
217
218 /* fill in the updated boot block fields */
219 if (params->flags & IB_APPEND) {
220 if (! S_ISREG(params->fsstat.st_mode)) {
221 warnx(
222 "`%s' must be a regular file to append a bootstrap",
223 params->filesystem);
224 goto done;
225 }
226 startblock = howmany(params->fsstat.st_size,
227 PMAX_BOOT_BLOCK_BLOCKSIZE);
228 } else if (params->flags & IB_STAGE1START) {
229 startblock = params->s1start;
230 } else {
231 startblock = PMAX_BOOT_BLOCK_OFFSET / PMAX_BOOT_BLOCK_BLOCKSIZE
232 + 1;
233 }
234
235 bb.map[0].start_block = htole32(startblock);
236 bb.map[0].num_blocks =
237 htole32(howmany(bootstrapsize, PMAX_BOOT_BLOCK_BLOCKSIZE));
238 bb.magic = htole32(PMAX_BOOT_MAGIC);
239 bb.load_addr = htole32(bootstrapload);
240 bb.exec_addr = htole32(bootstrapexec);
241 bb.mode = htole32(PMAX_BOOTMODE_CONTIGUOUS);
242
243 if (params->flags & IB_SUNSUM) {
244 uint16_t sum;
245
246 sum = compute_sunsum((uint16_t *)&bb);
247 if (! set_sunsum(params, (uint16_t *)&bb, sum))
248 goto done;
249 }
250
251 if (params->flags & IB_VERBOSE) {
252 printf("Bootstrap start sector: %u\n",
253 le32toh(bb.map[0].start_block));
254 printf("Bootstrap sector count: %u\n",
255 le32toh(bb.map[0].num_blocks));
256 printf("Bootstrap load address: %#x\n",
257 le32toh(bb.load_addr));
258 printf("Bootstrap exec address: %#x\n",
259 le32toh(bb.exec_addr));
260 printf("%sriting bootstrap\n",
261 (params->flags & IB_NOWRITE) ? "Not w" : "W");
262 }
263 if (params->flags & IB_NOWRITE) {
264 retval = 1;
265 goto done;
266 }
267 rv = pwrite(params->fsfd, bootstrapbuf, bootstrapsize,
268 startblock * PMAX_BOOT_BLOCK_BLOCKSIZE);
269 if (rv == -1) {
270 warn("Writing `%s'", params->filesystem);
271 goto done;
272 } else if ((size_t)rv != bootstrapsize) {
273 warnx("Writing `%s': short write", params->filesystem);
274 goto done;
275 }
276
277 if (params->flags & IB_VERBOSE)
278 printf("Writing boot block\n");
279 rv = pwrite(params->fsfd, &bb, sizeof(bb), PMAX_BOOT_BLOCK_OFFSET);
280 if (rv == -1) {
281 warn("Writing `%s'", params->filesystem);
282 goto done;
283 } else if (rv != sizeof(bb)) {
284 warnx("Writing `%s': short write", params->filesystem);
285 goto done;
286 } else {
287 retval = 1;
288 }
289
290 done:
291 if (bootstrapbuf)
292 free(bootstrapbuf);
293 return (retval);
294 }
295
296
297 #define MAX_SEGMENTS 10 /* We can load up to 10 segments */
298
299 struct seglist {
300 Elf32_Addr addr;
301 Elf32_Off f_offset;
302 Elf32_Word f_size;
303 };
304
305 static int
load_bootstrap(ib_params * params,char ** data,uint32_t * loadaddr,uint32_t * execaddr,size_t * len)306 load_bootstrap(ib_params *params, char **data,
307 uint32_t *loadaddr, uint32_t *execaddr, size_t *len)
308 {
309 int i, nsegs;
310 Elf32_Addr lowaddr, highaddr;
311 Elf32_Ehdr ehdr;
312 Elf32_Phdr phdr;
313 struct seglist seglist[MAX_SEGMENTS];
314
315 if ((pread(params->s1fd, &ehdr, sizeof(ehdr), 0)) != sizeof(ehdr)) {
316 warn("Reading `%s'", params->stage1);
317 return (0);
318 }
319 if ((memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) ||
320 (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) {
321 warnx("No ELF header in `%s'", params->stage1);
322 return (0);
323 }
324
325 nsegs = highaddr = 0;
326 lowaddr = (uint32_t) ULONG_MAX;
327
328 for (i = 0; i < le16toh(ehdr.e_phnum); i++) {
329 if (pread(params->s1fd, &phdr, sizeof(phdr),
330 (off_t) le32toh(ehdr.e_phoff) + i * sizeof(phdr))
331 != sizeof(phdr)) {
332 warn("Reading `%s'", params->stage1);
333 return (0);
334 }
335 if (le32toh(phdr.p_type) != PT_LOAD)
336 continue;
337
338 seglist[nsegs].addr = le32toh(phdr.p_paddr);
339 seglist[nsegs].f_offset = le32toh(phdr.p_offset);
340 seglist[nsegs].f_size = le32toh(phdr.p_filesz);
341 nsegs++;
342
343 if (le32toh(phdr.p_paddr) < lowaddr)
344 lowaddr = le32toh(phdr.p_paddr);
345 if (le32toh(phdr.p_paddr) + le32toh(phdr.p_filesz) > highaddr)
346 highaddr = le32toh(phdr.p_paddr) +
347 le32toh(phdr.p_filesz);
348 }
349
350 *loadaddr = lowaddr;
351 *execaddr = le32toh(ehdr.e_entry);
352 *len = roundup(highaddr - lowaddr, PMAX_BOOT_BLOCK_BLOCKSIZE);
353 if ((*data = malloc(*len)) == NULL) {
354 warn("Allocating %lu bytes", (unsigned long) *len);
355 return (0);
356 }
357
358 /* Now load the bootstrap into memory */
359 for (i = 0; i < nsegs; i++) {
360 if ((Elf32_Word)pread(params->s1fd,
361 *data + seglist[i].addr - lowaddr,
362 seglist[i].f_size, (off_t)seglist[i].f_offset)
363 != seglist[i].f_size) {
364 warn("Reading `%s'", params->stage1);
365 return (0);
366 }
367 }
368 return (1);
369 }
370