aboutsummaryrefslogtreecommitdiff
path: root/tools/fip_create/fip_create.c
blob: c97204ab058a55a2ef2753e473a86357e0c164f5 (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
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
/*
 * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of ARM nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <errno.h>
#include <getopt.h> /* getopt_long() is a GNU extention */
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "fip_create.h"
#include "firmware_image_package.h"

/* Values returned by getopt() as part of the command line parsing */
#define OPT_TOC_ENTRY 0
#define OPT_DUMP 1
#define OPT_HELP 2

file_info_t files[MAX_FILES];
unsigned file_info_count = 0;
uuid_t uuid_null = {0};

/*
 * TODO: Add ability to specify and flag different file types.
 * Add flags to the toc_entry?
 * const char* format_type_str[] = { "RAW", "ELF", "PIC" };
 */

/* Currently only BL2 and BL31 images are supported. */
static entry_lookup_list_t toc_entry_lookup_list[] = {
	{ "Trusted Boot Firmware BL2", UUID_TRUSTED_BOOT_FIRMWARE_BL2,
	  "bl2", NULL, FLAG_FILENAME },
	{ "SCP Firmware BL3-0", UUID_SCP_FIRMWARE_BL30,
	  "bl30", NULL, FLAG_FILENAME},
	{ "EL3 Runtime Firmware BL3-1", UUID_EL3_RUNTIME_FIRMWARE_BL31,
	  "bl31", NULL, FLAG_FILENAME},
	{ "Secure Payload BL3-2 (Trusted OS)", UUID_SECURE_PAYLOAD_BL32,
	  "bl32", NULL, FLAG_FILENAME},
	{ "Non-Trusted Firmware BL3-3", UUID_NON_TRUSTED_FIRMWARE_BL33,
	  "bl33", NULL, FLAG_FILENAME},
	{ NULL, {0}, 0 }
};


/* Return 0 for equal uuids */
static inline int compare_uuids(const uuid_t *uuid1, const uuid_t *uuid2)
{
	return memcmp(uuid1, uuid2, sizeof(uuid_t));
}


static inline void copy_uuid(uuid_t *to_uuid, const uuid_t *from_uuid)
{
	memcpy(to_uuid, from_uuid, sizeof(uuid_t));
}


static void print_usage(void)
{
	entry_lookup_list_t *entry = toc_entry_lookup_list;

	printf("Usage: fip_create [options] FIP_FILENAME\n\n");
	printf("\tThis tool is used to create a Firmware Image Package.\n\n");
	printf("Options:\n");
	printf("\t--help: Print this help message and exit\n");
	printf("\t--dump: Print contents of FIP\n\n");
	printf("\tComponents that can be added/updated:\n");
	for (; entry->command_line_name != NULL; entry++) {
		printf("\t--%s%s\t\t%s",
		       entry->command_line_name,
		       (entry->flags & FLAG_FILENAME) ? " FILENAME" : "",
		       entry->name);
		printf("\n");
	}
}


static entry_lookup_list_t *get_entry_lookup_from_uuid(const uuid_t *uuid)
{
	unsigned int lookup_index = 0;

	while (toc_entry_lookup_list[lookup_index].command_line_name != NULL) {
		if (compare_uuids(&toc_entry_lookup_list[lookup_index].name_uuid,
		    uuid) == 0) {
			return &toc_entry_lookup_list[lookup_index];
		}
		lookup_index++;
	}
	return NULL;
}


static file_info_t *find_file_info_from_uuid(const uuid_t *uuid)
{
	int index;

	for (index = 0; index < file_info_count; index++) {
		if (compare_uuids(&files[index].name_uuid, uuid) == 0) {
			return &files[index];
		}
	}
	return NULL;
}


static int add_file_info_entry(entry_lookup_list_t *lookup_entry, char *filename)
{
	file_info_t *file_info_entry;
	int error;
	struct stat file_status;
	bool is_new_entry = false;

	/* Check if the file already exists in the array */
	file_info_entry = find_file_info_from_uuid(&lookup_entry->name_uuid);
	if (file_info_entry == NULL) {
		/* The file does not exist in the current list; take the next
		 * one available in the file_info list. 'file_info_count' is
		 * incremented in case of successful update at the end of the
		 * function.
		 */
		file_info_entry = &files[file_info_count];
		is_new_entry = true;

		/* Copy the uuid for the new entry */
		copy_uuid(&file_info_entry->name_uuid,
			  &lookup_entry->name_uuid);
	}

	/* Get the file information for entry */
	error = stat(filename, &file_status);
	if (error != 0) {
		printf("Error: Cannot get information for file \"%s\": %s\n",
			filename, strerror(errno));
		return errno;
	}
	file_info_entry->filename = filename;
	file_info_entry->size = (unsigned int)file_status.st_size;
	file_info_entry->entry = lookup_entry;

	/* Increment the file_info counter on success if it is new file entry */
	if (is_new_entry) {
		file_info_count++;

		/* Ensure we do not overflow */
		if (file_info_count > MAX_FILES) {
			printf("ERROR: Too many files in Package\n");
			return 1;
		}
	}

	return 0;
}


static int write_memory_to_file(const uint8_t *start, const char *filename,
		unsigned int size)
{
	FILE *stream;
	unsigned int bytes_written;

	/* Write the packed file out to the filesystem */
	stream = fopen(filename, "r+");
	if (stream == NULL) {
		stream = fopen(filename, "w");
		if (stream == NULL) {
			printf("Error: Cannot create output file \"%s\": %s\n",
			       filename, strerror(errno));
			return errno;
		} else {
			printf("Creating \"%s\"\n", filename);
		}
	} else {
		printf("Updating \"%s\"\n", filename);
	}

	bytes_written = fwrite(start, sizeof(uint8_t), size, stream);
	fclose(stream);

	if (bytes_written != size) {
		printf("Error: Incorrect write for file \"%s\": Size=%u,"
			"Written=%u bytes.\n", filename, size, bytes_written);
		return EIO;
	}

	return 0;
}


static int read_file_to_memory(void *memory, const file_info_t *info)
{
	FILE *stream;
	unsigned int bytes_read;

	/* If the file_info is defined by its filename we need to load it */
	if (info->filename) {
		/* Read image from filesystem */
		stream = fopen(info->filename, "r");
		if (stream == NULL) {
			printf("Error: Cannot open file \"%s\": %s\n",
				info->filename, strerror(errno));
			return errno;
		}

		bytes_read = (unsigned int)fread(memory, sizeof(uint8_t),
						 info->size, stream);
		fclose(stream);
		if (bytes_read != info->size) {
			printf("Error: Incomplete read for file \"%s\":"
				"Size=%u, Read=%u bytes.\n", info->filename,
				info->size, bytes_read);
			return EIO;
		}
	} else {
		if (info->image_buffer == NULL) {
			printf("ERROR: info->image_buffer = NULL\n");
			return EIO;
		}
		/* Copy the file_info buffer (extracted from the existing
		 * image package) into the new buffer.
		 */
		memcpy(memory, info->image_buffer, info->size);
	}

	return 0;
}


/* Create the image package file */
static int pack_images(const char *fip_filename)
{
	int status;
	uint8_t *fip_base_address;
	void *entry_address;
	fip_toc_header_t *toc_header;
	fip_toc_entry_t *toc_entry;
	unsigned int entry_index;
	unsigned int toc_size;
	unsigned int fip_size;
	unsigned int entry_offset_address;
	unsigned int payload_size = 0;

	/* Validate filename */
	if ((fip_filename == NULL) || (strcmp(fip_filename, "") == 0)) {
		return EINVAL;
	}

	/* Payload size calculation */
	for (entry_index = 0; entry_index < file_info_count; entry_index++) {
		payload_size += files[entry_index].size;
	}

	/* Allocate memory for entire package, including the final null entry */
	toc_size = (sizeof(fip_toc_header_t) +
		    (sizeof(fip_toc_entry_t) * (file_info_count + 1)));
	fip_size = toc_size + payload_size;
	fip_base_address = malloc(fip_size);
	if (fip_base_address == NULL) {
		printf("Error: Can't allocate enough memory to create package."
		       "Process aborted.\n");
		return ENOMEM;
	}
	memset(fip_base_address, 0, fip_size);

	/* Create ToC Header */
	toc_header = (fip_toc_header_t *)fip_base_address;
	toc_header->name = TOC_HEADER_NAME;
	toc_header->serial_number = TOC_HEADER_SERIAL_NUMBER;
	toc_header->flags = 0;

	toc_entry = (fip_toc_entry_t *)(fip_base_address +
				      sizeof(fip_toc_header_t));

	/* Calculate the starting address of the first image, right after the
	 * toc header.
	 */
	entry_offset_address = toc_size;
	entry_index = 0;

	/* Create the package in memory. */
	for (entry_index = 0; entry_index < file_info_count; entry_index++) {
		entry_address = (fip_base_address + entry_offset_address);
		status = read_file_to_memory(entry_address,
					     &files[entry_index]);
		if (status != 0) {
			printf("Error: While reading \"%s\" from filesystem.\n",
				files[entry_index].filename);
			return status;
		}

		copy_uuid(&toc_entry->uuid, &files[entry_index].name_uuid);
		toc_entry->offset_address = entry_offset_address;
		toc_entry->size = files[entry_index].size;
		toc_entry->flags = 0;
		entry_offset_address += toc_entry->size;
		toc_entry++;
	}

	/* Add a null uuid entry to mark the end of toc entries */
	copy_uuid(&toc_entry->uuid, &uuid_null);
	toc_entry->offset_address = entry_offset_address;
	toc_entry->size = 0;
	toc_entry->flags = 0;

	/* Save the package to file */
	status = write_memory_to_file(fip_base_address, fip_filename, fip_size);
	if (status != 0) {
		printf("Error: Failed while writing package to file \"%s\" "
			"with status=%d.\n", fip_filename, status);
		return status;
	}
	return 0;
}


static void dump_toc(void)
{
	unsigned int index = 0;
	unsigned int image_offset;
	unsigned int image_size = 0;

	image_offset = sizeof(fip_toc_header_t) +
		(sizeof(fip_toc_entry_t) * (file_info_count + 1));

	printf("Firmware Image Package ToC:\n");
	printf("---------------------------\n");
	for (index = 0; index < file_info_count; index++) {
		if (files[index].entry) {
			printf("- %s: ", files[index].entry->name);
		} else {
			printf("- Unknown entry: ");
		}
		image_size = files[index].size;

		printf("offset=0x%X, size=0x%X\n", image_offset, image_size);
		image_offset += image_size;

		if (files[index].filename) {
			printf("  file: '%s'\n", files[index].filename);
		}
	}
	printf("---------------------------\n");
}


/* Read and load existing package into memory. */
static int parse_fip(const char *fip_filename)
{
	FILE *fip;
	char *fip_buffer;
	char *fip_buffer_end;
	int fip_size, read_fip_size;
	fip_toc_header_t *toc_header;
	fip_toc_entry_t *toc_entry;
	bool found_last_toc_entry = false;
	file_info_t *file_info_entry;
	int status = -1;
	struct stat st;

	fip = fopen(fip_filename, "r");
	if (fip == NULL) {
		/* If the fip does not exist just return, it should not be
		 * considered as an error. The package will be created later
		 */
		status = 0;
		goto parse_fip_return;
	}

	if (stat(fip_filename, &st) != 0) {
		status = errno;
		goto parse_fip_fclose;
	} else {
		fip_size = (int)st.st_size;
	}

	/* Allocate a buffer to read the package */
	fip_buffer = (char *)malloc(fip_size);
	if (fip_buffer == NULL) {
		printf("ERROR: Cannot allocate %d bytes.\n", fip_size);
		status = errno;
		goto parse_fip_fclose;
	}
	fip_buffer_end = fip_buffer + fip_size;

	/* Read the file */
	read_fip_size = fread(fip_buffer, sizeof(char), fip_size, fip);
	if (read_fip_size != fip_size) {
		printf("ERROR: Cannot read the FIP.\n");
		status = EIO;
		goto parse_fip_free;
	}
	fclose(fip);
	fip = NULL;

	/* The package must at least contain the ToC Header */
	if (fip_size < sizeof(fip_toc_header_t)) {
		printf("ERROR: Given FIP is smaller than the ToC header.\n");
		status = EINVAL;
		goto parse_fip_free;
	}
	/* Set the ToC Header at the base of the buffer */
	toc_header = (fip_toc_header_t *)fip_buffer;
	/* The first toc entry should be just after the ToC header */
	toc_entry = (fip_toc_entry_t *)(toc_header + 1);

	/* While the ToC entry is contained into the buffer */
	int cnt = 0;
	while (((char *)toc_entry + sizeof(fip_toc_entry_t)) < fip_buffer_end) {
		cnt++;
		/* Check if the ToC Entry is the last one */
		if (compare_uuids(&toc_entry->uuid, &uuid_null) == 0) {
			found_last_toc_entry = true;
			status = 0;
			break;
		}

		/* Add the entry into file_info */

		/* Get the new entry in the array and clear it */
		file_info_entry = &files[file_info_count++];
		memset(file_info_entry, 0, sizeof(file_info_t));

		/* Copy the info from the ToC entry */
		copy_uuid(&file_info_entry->name_uuid, &toc_entry->uuid);
		file_info_entry->image_buffer = fip_buffer +
		  toc_entry->offset_address;
		file_info_entry->size = toc_entry->size;

		/* Check if there is a corresponding entry in lookup table */
		file_info_entry->entry =
		  get_entry_lookup_from_uuid(&toc_entry->uuid);

		/* Go to the next ToC entry */
		toc_entry++;
	}

	if (!found_last_toc_entry) {
		printf("ERROR: Given FIP does not have an end ToC entry.\n");
		status = EINVAL;
		goto parse_fip_free;
	} else {
		/* All is well, we should not free any of the loaded images */
		goto parse_fip_fclose;
	}

 parse_fip_free:
	if (fip_buffer != NULL) {
		free(fip_buffer);
		fip_buffer = NULL;
	}

 parse_fip_fclose:
	if (fip != NULL) {
		fclose(fip);
	}

 parse_fip_return:
	return status;
}


/* Parse all command-line options and return the FIP name if present. */
static char *get_filename(int argc, char **argv, struct option *options)
{
	int c;
	char *filename = NULL;

	/* Reset option pointer so we parse all args. starts at 1.
	 * The filename is the only argument that does not have an option flag.
	 */
	optind = 1;
	while (1) {
		c = getopt_long(argc, argv, "", options, NULL);
		if (c == -1)
			break;

		if (c == '?') {
			/* Failed to parse an option. Fail. */
			return NULL;
		}
	}

	/* Only one argument left then it is the filename.
	 * We dont expect any other options
	 */
	if (optind + 1 == argc)
		filename = argv[optind];

	return filename;
}


/* Work through command-line options */
static int parse_cmdline(int argc, char **argv, struct option *options,
			 int *do_pack)
{
	int c;
	int status = 0;
	int option_index = 0;
	entry_lookup_list_t *lookup_entry;
	int do_dump = 0;

	/* restart parse to process all options. starts at 1. */
	optind = 1;
	while (1) {
		c = getopt_long(argc, argv, "", options, &option_index);
		if (c == -1)
			break;

		switch (c) {
		case OPT_TOC_ENTRY:
			if (optarg) {
				/* Does the option expect a filename. */
				lookup_entry = &toc_entry_lookup_list[option_index];
				if (lookup_entry->flags & FLAG_FILENAME) {
					status = add_file_info_entry(lookup_entry, optarg);
					if (status != 0) {
						printf("Failed to process %s\n",
						       options[option_index].name);
						break;
					} else {
						/* Update package */
						*do_pack = 1;
					}
				}
			}
			break;

		case OPT_DUMP:
			do_dump = 1;
			continue;

		case OPT_HELP:
			print_usage();
			exit(0);

		default:
			/* Unrecognised options are caught in get_filename() */
			break;
		}
	}


	/* Do not dump toc if we have an error as it could hide the error */
	if ((status == 0) && (do_dump)) {
		dump_toc();
	}

	return status;

}

int main(int argc, char **argv)
{
	int i;
	int status;
	char *fip_filename;
	int do_pack = 0;

	/* Clear file list table. */
	memset(files, 0, sizeof(files));

	/* Initialise for getopt_long().
	 * Use image table as defined at top of file to get options.
	 * Add 'dump' option, 'help' option and end marker.
	 */
	static struct option long_options[(sizeof(toc_entry_lookup_list)/
					   sizeof(entry_lookup_list_t)) + 2];

	for (i = 0;
	     /* -1 because we dont want to process end marker in toc table */
	     i < sizeof(toc_entry_lookup_list)/sizeof(entry_lookup_list_t) - 1;
	     i++) {
		long_options[i].name = toc_entry_lookup_list[i].command_line_name;
		/* The only flag defined at the moment is for a FILENAME */
		long_options[i].has_arg = toc_entry_lookup_list[i].flags ? 1 : 0;
		long_options[i].flag = 0;
		long_options[i].val = OPT_TOC_ENTRY;
	}

	/* Add '--dump' option */
	long_options[i].name = "dump";
	long_options[i].has_arg = 0;
	long_options[i].flag = 0;
	long_options[i].val = OPT_DUMP;

	/* Add '--help' option */
	long_options[++i].name = "help";
	long_options[i].has_arg = 0;
	long_options[i].flag = 0;
	long_options[i].val = OPT_HELP;

	/* Zero the last entry (required) */
	long_options[++i].name = 0;
	long_options[i].has_arg = 0;
	long_options[i].flag = 0;
	long_options[i].val = 0;

#ifdef DEBUG
	/* Print all supported options */
	for (i = 0; i < sizeof(long_options)/sizeof(struct option); i++) {
		printf("long opt (%d) : name = %s\n", i, long_options[i].name);
	}
#endif /* DEBUG */

	/* As the package may already exist and is to be updated we need to get
	 * the filename from the arguments and load from it.
	 * NOTE: As this is the first function to look at the program arguments
	 * it causes a failure if bad options were provided.
	 */
	fip_filename = get_filename(argc, argv, long_options);

	/* Try to open the file and load it into memory */
	if (fip_filename != NULL) {
		status = parse_fip(fip_filename);
		if (status != 0) {
			return status;
		}
	}

	/* Work through provided program arguments and perform actions */
	status = parse_cmdline(argc, argv, long_options, &do_pack);
	if (status != 0) {
		return status;
	};

	if (fip_filename == NULL) {
		printf("ERROR: Missing FIP filename\n");
		print_usage();
		return 0;
	}

	/* Processed all command line options. Create/update the package if
	 * required.
	 */
	if (do_pack) {
		status = pack_images(fip_filename);
		if (status != 0) {
			printf("Failed to create package (status = %d).\n",
			       status);
		}
	}

	return status;
}