summaryrefslogtreecommitdiffstats
path: root/layout.c
blob: 39f504acf2e71c05143e33220e119e4c84c9f526 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2005-2008 coresystems GmbH
 * (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
 * Copyright (C) 2011-2013 Stefan Tauner
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "flash.h"
#include "programmer.h"
#include "layout.h"

struct flashrom_layout {
	struct romentry *head;
};

struct layout_include_args {
	char *name;
	char *file;
	struct layout_include_args *next;
};

const struct flashrom_layout *get_default_layout(const struct flashrom_flashctx *const flashctx)
{
	return flashctx->default_layout;
}

const struct flashrom_layout *get_layout(const struct flashrom_flashctx *const flashctx)
{
	if (flashctx->layout)
		return flashctx->layout;
	else
		return get_default_layout(flashctx);
}

static struct romentry *mutable_layout_next(
		const struct flashrom_layout *const layout, struct romentry *iterator)
{
	return iterator ? iterator->next : layout->head;
}

static struct romentry *_layout_entry_by_name(
		const struct flashrom_layout *const layout, const char *name)
{
	struct romentry *entry = NULL;
	while ((entry = mutable_layout_next(layout, entry))) {
		if (!strcmp(entry->name, name))
			return entry;
	}
	return NULL;
}

#ifndef __LIBPAYLOAD__
int layout_from_file(struct flashrom_layout **layout, const char *name)
{
	FILE *romlayout;
	char tempstr[256], tempname[256];
	int ret = 1;

	if (flashrom_layout_new(layout))
		return 1;

	romlayout = fopen(name, "r");

	if (!romlayout) {
		msg_gerr("ERROR: Could not open layout file (%s).\n",
			name);
		return -1;
	}

	while (!feof(romlayout)) {
		char *tstr1, *tstr2;

		if (2 != fscanf(romlayout, "%255s %255s\n", tempstr, tempname))
			continue;
#if 0
		// fscanf does not like arbitrary comments like that :( later
		if (tempstr[0] == '#') {
			continue;
		}
#endif
		tstr1 = strtok(tempstr, ":");
		tstr2 = strtok(NULL, ":");
		if (!tstr1 || !tstr2) {
			msg_gerr("Error parsing layout file. Offending string: \"%s\"\n", tempstr);
			goto _close_ret;
		}
		if (flashrom_layout_add_region(*layout,
				strtol(tstr1, NULL, 16), strtol(tstr2, NULL, 16), tempname))
			goto _close_ret;
	}
	ret = 0;

_close_ret:
	(void)fclose(romlayout);
	return ret;
}
#endif

/* register an include argument (-i) for later processing */
int register_include_arg(struct layout_include_args **args, const char *arg)
{
	struct layout_include_args *tmp;
	char *colon;
	char *name;
	char *file;

	if (arg == NULL) {
		msg_gerr("<NULL> is a bad region name.\n");
		return 1;
	}

	/* -i <image>[:<file>] */
	colon = strchr(arg, ':');
	if (colon && !colon[1]) {
		msg_gerr("Missing filename parameter in %s\n", arg);
		return 1;
	}
	name = colon ? strndup(arg, colon - arg) : strdup(arg);
	file = colon ? strdup(colon + 1) : NULL;

	for (tmp = *args; tmp; tmp = tmp->next) {
		if (!strcmp(tmp->name, name)) {
			msg_gerr("Duplicate region name: \"%s\".\n", name);
			goto error;
		}
	}

	tmp = malloc(sizeof(*tmp));
	if (tmp == NULL) {
		msg_gerr("Could not allocate memory");
		goto error;
	}

	tmp->name = name;
	tmp->file = file;
	tmp->next = *args;
	*args = tmp;
	return 0;

error:
	free(name);
	free(file);
	return 1;
}

/* returns 0 to indicate success, 1 to indicate failure */
static int include_region(struct flashrom_layout *const l, const char *name,
			  const char *file)
{
	struct romentry *const entry = _layout_entry_by_name(l, name);
	if (entry) {
		entry->included = true;
		if (file)
			entry->file = strdup(file);
		return 0;
	}
	return 1;
}

/* returns -1 if an entry is not found, 0 if found. */
static int find_romentry(struct flashrom_layout *const l, char *name, char *file)
{
	if (!l->head)
		return -1;

	msg_gspew("Looking for region \"%s\"... ", name);
	if (include_region(l, name, file)) {
		msg_gspew("not found.\n");
		return -1;
	}
	msg_gspew("found.\n");
	return 0;
}

/* process -i arguments
 * returns 0 to indicate success, >0 to indicate failure
 */
int process_include_args(struct flashrom_layout *l, const struct layout_include_args *const args)
{
	unsigned int found = 0;
	const struct layout_include_args *tmp;

	if (args == NULL)
		return 0;

	/* User has specified an include argument, but no layout is loaded. */
	if (!l || !l->head) {
		msg_gerr("Region requested (with -i \"%s\"), "
			 "but no layout data is available.\n",
			 args->name);
		return 1;
	}

	tmp = args;
	while (tmp) {
		if (find_romentry(l, tmp->name, tmp->file) < 0) {
			msg_gerr("Invalid region specified: \"%s\".\n",
				 tmp->name);
			return 1;
		}
		tmp = tmp->next;
		found++;
	}

	msg_ginfo("Using region%s: ", found > 1 ? "s" : "");
	tmp = args;
	while (tmp) {
		msg_ginfo("\"%s\"", tmp->name);
		if (tmp->file)
			msg_ginfo(":\"%s\"", tmp->file);
		if (found > 1)
			msg_ginfo(", ");
		found--;
		tmp = tmp->next;
	}
	msg_ginfo(".\n");
	return 0;
}

/* returns boolean 1 if any regions overlap, 0 otherwise */
int included_regions_overlap(const struct flashrom_layout *const l)
{
	const struct romentry *lhs = NULL;
	int overlap_detected = 0;

	while ((lhs = layout_next(l, lhs))) {
		if (!lhs->included)
			continue;

		const struct romentry *rhs = lhs;
		while ((rhs = layout_next(l, rhs))) {
			if (!rhs->included)
				continue;

			if (lhs->start > rhs->end)
				continue;

			if (lhs->end < rhs->start)
				continue;

			msg_gwarn("Regions %s [0x%08x-0x%08x] and %s [0x%08x-0x%08x] overlap\n",
				  lhs->name, lhs->start, lhs->end, rhs->name, rhs->start, rhs->end);
			overlap_detected = 1;
		}
	}
	return overlap_detected;
}

void cleanup_include_args(struct layout_include_args **args)
{
	struct layout_include_args *tmp;

	while (*args) {
		tmp = (*args)->next;
		free((*args)->name);
		free((*args)->file);
		free(*args);
		*args = tmp;
	}
}

int layout_sanity_checks(const struct flashrom_flashctx *const flash)
{
	const struct flashrom_layout *const layout = get_layout(flash);
	const chipsize_t total_size = flash->chip->total_size * 1024;
	int ret = 0;

	const struct romentry *entry = NULL;
	while ((entry = layout_next(layout, entry))) {
		if (entry->start >= total_size || entry->end >= total_size) {
			msg_gwarn("Warning: Address range of region \"%s\" "
				  "exceeds the current chip's address space.\n", entry->name);
			if (entry->included)
				ret = 1;
		}
		if (entry->start > entry->end) {
			msg_gerr("Error: Size of the address range of region \"%s\" is not positive.\n",
				  entry->name);
			ret = 1;
		}
	}

	return ret;
}

void prepare_layout_for_extraction(struct flashctx *flash)
{
	const struct flashrom_layout *const l = get_layout(flash);
	struct romentry *entry = NULL;
	unsigned int i;

	while ((entry = mutable_layout_next(l, entry))) {
		entry->included = true;

		if (!entry->file)
			entry->file = strdup(entry->name);

		for (i = 0; entry->file[i]; ++i) {
			if (isspace(entry->file[i]))
				entry->file[i] = '_';
		}
	}
}

const struct romentry *layout_next_included_region(
		const struct flashrom_layout *const l, const chipoff_t where)
{
	const struct romentry *entry = NULL, *lowest = NULL;

	while ((entry = layout_next(l, entry))) {
		if (!entry->included)
			continue;
		if (entry->end < where)
			continue;
		if (!lowest || lowest->start > entry->start)
			lowest = entry;
	}

	return lowest;
}

const struct romentry *layout_next_included(
		const struct flashrom_layout *const layout, const struct romentry *iterator)
{
	while ((iterator = layout_next(layout, iterator))) {
		if (iterator->included)
			break;
	}
	return iterator;
}

const struct romentry *layout_next(
		const struct flashrom_layout *const layout, const struct romentry *iterator)
{
	return iterator ? iterator->next : layout->head;
}

int flashrom_layout_new(struct flashrom_layout **const layout)
{
	*layout = malloc(sizeof(**layout));
	if (!*layout) {
		msg_gerr("Error creating layout: %s\n", strerror(errno));
		return 1;
	}

	const struct flashrom_layout tmp = { 0 };
	**layout = tmp;
	return 0;
}

int flashrom_layout_add_region(
		struct flashrom_layout *const layout,
		const size_t start, const size_t end, const char *const name)
{
	struct romentry *const entry = malloc(sizeof(*entry));
	if (!entry)
		goto _err_ret;

	const struct romentry tmp = {
		.next		= layout->head,
		.start		= start,
		.end		= end,
		.included	= false,
		.name		= strdup(name),
		.file		= NULL,
	};
	*entry = tmp;
	if (!entry->name)
		goto _err_ret;

	msg_gdbg("Added layout entry %08zx - %08zx named %s\n", start, end, name);
	layout->head = entry;
	return 0;

_err_ret:
	msg_gerr("Error adding layout entry: %s\n", strerror(errno));
	free(entry);
	return 1;
}

int flashrom_layout_include_region(struct flashrom_layout *const layout, const char *name)
{
	return include_region(layout, name, NULL);
}

int flashrom_layout_get_region_range(struct flashrom_layout *const l, const char *name,
			      unsigned int *start, unsigned int *len)
{
	const struct romentry *const entry = _layout_entry_by_name(l, name);
	if (entry) {
		*start = entry->start;
		*len = entry->end - entry->start + 1;
		return 0;
	}
	return 1;
}

void flashrom_layout_release(struct flashrom_layout *const layout)
{
	if (!layout)
		return;

	while (layout->head) {
		struct romentry *const entry = layout->head;
		layout->head = entry->next;
		free(entry->file);
		free(entry->name);
		free(entry);
	}
	free(layout);
}