summaryrefslogtreecommitdiff
path: root/tools/firmware-utils/src/imagetag.c
blob: 166ce9a0e2401a50469860f9993d42a199202ff2 (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
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Axel Gembe <ago@bastart.eu.org>
 * Copyright (C) 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include <netinet/in.h>

#include "bcm_tag.h"
#include "imagetag_cmdline.h"

#define DEADCODE			0xDEADC0DE

/* Kernel header */
struct kernelhdr {
	uint32_t		loadaddr;	/* Kernel load address */
	uint32_t		entry;		/* Kernel entry point address */
	uint32_t		lzmalen;	/* Compressed length of the LZMA data that follows */
};

static char pirellitab[NUM_PIRELLI][BOARDID_LEN] = PIRELLI_BOARDS;

static uint32_t crc32tab[256] = {
	0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
	0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
	0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
	0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
	0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
	0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
	0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
	0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
	0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
	0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
	0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
	0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
	0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
	0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
	0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
	0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
	0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
	0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
	0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
	0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
	0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
	0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
	0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
	0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
	0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
	0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
	0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
	0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
	0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
	0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
	0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
	0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};

void int2tag(char *tag, uint32_t value) {
  uint32_t network = htonl(value);
  memcpy(tag, (char *)(&network), 4);
}

uint32_t crc32(uint32_t crc, uint8_t *data, size_t len)
{
	while (len--)
		crc = (crc >> 8) ^ crc32tab[(crc ^ *data++) & 0xFF];

	return crc;
}

uint32_t compute_crc32(uint32_t crc, FILE *binfile, size_t compute_start, size_t compute_len)
{
	uint8_t readbuf[1024];
	size_t read;

	fseek(binfile, compute_start, SEEK_SET);

	/* read block of 1024 bytes */
	while (binfile && !feof(binfile) && !ferror(binfile) && (compute_len >= sizeof(readbuf))) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), binfile);
		crc = crc32(crc, readbuf, read);
		compute_len = compute_len - read;
	}

	/* Less than 1024 bytes remains, read compute_len bytes */
	if (binfile && !feof(binfile) && !ferror(binfile) && (compute_len > 0)) {
		read = fread(readbuf, sizeof(uint8_t), compute_len, binfile);
		crc = crc32(crc, readbuf, read);
	}

	return crc;
}

size_t getlen(FILE *fp)
{
	size_t retval, curpos;

	if (!fp)
		return 0;

	curpos = ftell(fp);
	fseek(fp, 0, SEEK_END);
	retval = ftell(fp);
	fseek(fp, curpos, SEEK_SET);

	return retval;
}

int tagfile(const char *kernel, const char *rootfs, const char *bin, \
			const struct gengetopt_args_info *args, \
			uint32_t flash_start, uint32_t image_offset, \
			uint32_t block_size, uint32_t load_address, uint32_t entry)
{
	struct bcm_tag tag;
	struct kernelhdr khdr;
	FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile = NULL, *cfefile = NULL;
	size_t cfeoff, cfelen, kerneloff, kernellen, rootfsoff, rootfslen, \
	  read, imagelen, rootfsoffpadlen = 0, kernelfslen, kerneloffpadlen = 0, oldrootfslen;
	uint8_t readbuf[1024];
	uint32_t imagecrc = IMAGETAG_CRC_START;
	uint32_t kernelcrc = IMAGETAG_CRC_START;
	uint32_t rootfscrc = IMAGETAG_CRC_START;
	uint32_t kernelfscrc = IMAGETAG_CRC_START;
	uint32_t fwaddr = 0;
	uint8_t crc_val;
	const uint32_t deadcode = htonl(DEADCODE);
	int i;
	int is_pirelli = 0;


	memset(&tag, 0, sizeof(struct bcm_tag));

	if (!kernel || !rootfs) {
		fprintf(stderr, "imagetag can't create an image without both kernel and rootfs\n");
	}

	if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
		fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
		return 1;
	}

	if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
		fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
		return 1;
	}

	if (!bin || !(binfile = fopen(bin, "wb+"))) {
		fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
		return 1;
	}

	if ((args->cfe_given) && (args->cfe_arg)) {
	  if (!(cfefile = fopen(args->cfe_arg, "rb"))) {
		fprintf(stderr, "Unable to open CFE file \"%s\"\n", args->cfe_arg);
	  }
	}

	fwaddr = flash_start + image_offset;
	if (cfefile) {
	  cfeoff = flash_start;		  
	  cfelen = getlen(cfefile);
	  /* Seek to the start of the file after tag */
	  fseek(binfile, sizeof(tag), SEEK_SET);
	  
	  /* Write the cfe */
	  while (cfefile && !feof(cfefile) && !ferror(cfefile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), cfefile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	  }

	} else {
	  cfeoff = 0;
	  cfelen = 0;
	}

	if (!args->root_first_flag) {
	  /* Build the kernel address and length (doesn't need to be aligned, read only) */
	  kerneloff = fwaddr + sizeof(tag);
	  
	  kernellen = getlen(kernelfile);
	  
	  if (!args->kernel_file_has_header_flag) {
		/* Build the kernel header */
		khdr.loadaddr	= htonl(load_address);
		khdr.entry	= htonl(entry);
		khdr.lzmalen	= htonl(kernellen);
		
		/* Increase the kernel size by the header size */
		kernellen += sizeof(khdr);	  
	  }
	  
	  /* Build the rootfs address and length (start and end do need to be aligned on flash erase block boundaries */
	  rootfsoff = kerneloff + kernellen;
	  rootfsoff = (rootfsoff % block_size) > 0 ? (((rootfsoff / block_size) + 1) * block_size) : rootfsoff;
	  rootfslen = getlen(rootfsfile);
	  rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
	  imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
	  rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);
	  
	  /* Seek to the start of the kernel */
	  fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
	  
	  /* Write the kernel header */
	  fwrite(&khdr, sizeof(khdr), 1, binfile);
	  
	  /* Write the kernel */
	  while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	  }

	  /* Write the RootFS */
	  fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
	  while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	  }

	  /* Align image to specified erase block size and append deadc0de */
	  printf("Data alignment to %dk with 'deadc0de' appended\n", block_size/1024);
	  fseek(binfile, rootfsoff + rootfslen - fwaddr + cfelen, SEEK_SET);
	  fwrite(&deadcode, sizeof(uint32_t), 1, binfile);

	  oldrootfslen = rootfslen;
	  if (args->pad_given) {
		uint32_t allfs = 0xffffffff;
		uint32_t pad_size = args->pad_arg * 1024 * 1024;

		printf("Padding image to %d bytes ...\n", pad_size);
		while (imagelen < pad_size) {
			fwrite(&allfs, sizeof(uint32_t), 1, binfile);
			imagelen += 4;
			rootfslen += 4;
		}
	  }

	  /* Flush the binfile buffer so that when we read from file, it contains
	   * everything in the buffer
	   */
	  fflush(binfile);

	  /* Compute the crc32 of the entire image (deadC0de included) */
	  imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr + cfelen, imagelen);
	  /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
	  kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
	  /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
	  kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
	  /* Compute the crc32 of the flashImageStart to rootLength.
	   * The broadcom firmware assumes the rootfs starts the image,
	   * therefore uses the rootfs start to determine where to flash
	   * the image.  Since we have the kernel first we have to give
	   * it the kernel address, but the crc uses the length
	   * associated with this address, which is added to the kernel
	   * length to determine the length of image to flash and thus
	   * needs to be rootfs + deadcode
	   */
	  rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr + cfelen, rootfslen + sizeof(deadcode));

	} else {
	  /* Build the kernel address and length (doesn't need to be aligned, read only) */
	  rootfsoff = fwaddr + sizeof(tag);
	  oldrootfslen = getlen(rootfsfile);
	  rootfslen = oldrootfslen;
	  rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
	  kerneloffpadlen = rootfslen - oldrootfslen;
	  oldrootfslen = rootfslen;

	  kerneloff = rootfsoff + rootfslen;
	  kernellen = getlen(kernelfile);

	  imagelen = cfelen + rootfslen + kernellen;
	  
	  /* Seek to the start of the kernel */
	  fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
	  
	  if (!args->kernel_file_has_header_flag) {
		/* Build the kernel header */
		khdr.loadaddr	= htonl(load_address);
		khdr.entry	= htonl(entry);
		khdr.lzmalen	= htonl(kernellen);
		
		/* Write the kernel header */
		fwrite(&khdr, sizeof(khdr), 1, binfile);
	  
		/* Increase the kernel size by the header size */
		kernellen += sizeof(khdr);	  
	  }
	  
	  /* Write the kernel */
	  while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	  }

	  /* Write the RootFS */
	  fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
	  while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
		read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
		fwrite(readbuf, sizeof(uint8_t), read, binfile);
	  }

	  /* Flush the binfile buffer so that when we read from file, it contains
	   * everything in the buffer
	   */
	  fflush(binfile);

	  /* Compute the crc32 of the entire image (deadC0de included) */
	  imagecrc = compute_crc32(imagecrc, binfile, sizeof(tag), imagelen);
	  /* Compute the crc32 of the kernel and padding between kernel and rootfs) */
	  kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
	  kernelfscrc = compute_crc32(kernelfscrc, binfile, rootfsoff - fwaddr + cfelen, kernellen + rootfslen);
	  rootfscrc = compute_crc32(rootfscrc, binfile, rootfsoff - fwaddr + cfelen, rootfslen);
	}

	/* Close the files */
	if (cfefile) {
	  fclose(cfefile);
	}
	fclose(kernelfile);
	fclose(rootfsfile);

	/* Build the tag */
	strncpy(tag.tagVersion, args->tag_version_arg, sizeof(tag.tagVersion) - 1);
	strncpy(tag.sig_1, args->signature_arg, sizeof(tag.sig_1) - 1);
	strncpy(tag.sig_2, args->signature2_arg, sizeof(tag.sig_2) - 1);
	strncpy(tag.chipid, args->chipid_arg, sizeof(tag.chipid) - 1);
	strncpy(tag.boardid, args->boardid_arg, sizeof(tag.boardid) - 1);
	strcpy(tag.big_endian, "1");
	sprintf(tag.totalLength, "%lu", imagelen);

	if (args->cfe_given) {
	  sprintf(tag.cfeAddress, "%lu", flash_start);
	  sprintf(tag.cfeLength, "%lu", cfelen);
	} else {
	  /* We don't include CFE */
	  strcpy(tag.cfeAddress, "0");
	  strcpy(tag.cfeLength, "0");
	}

	sprintf(tag.kernelAddress, "%lu", kerneloff);
	sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);

	if (args->root_first_flag) {
	  sprintf(tag.flashImageStart, "%lu", rootfsoff);
	  sprintf(tag.flashRootLength, "%lu", rootfslen);	  
	} else {
	  sprintf(tag.flashImageStart, "%lu", kerneloff);
	  sprintf(tag.flashRootLength, "%lu", rootfslen + sizeof(deadcode));
	}
	int2tag(tag.rootLength, oldrootfslen + sizeof(deadcode));

	if (args->rsa_signature_given) {
	    strncpy(tag.rsa_signature, args->rsa_signature_arg, RSASIG_LEN);
	}

	if (args->layoutver_given) {
	    strncpy(tag.flashLayoutVer, args->layoutver_arg, TAGLAYOUT_LEN);
	}

	if (args->info1_given) {
	  strncpy(tag.information1, args->info1_arg, TAGINFO1_LEN);
	}

	if (args->info2_given) {
	  strncpy(tag.information2, args->info2_arg, TAGINFO2_LEN);
	}

	if (args->reserved2_given) {
	  strncpy(tag.reserved2, args->reserved2_arg, 16);
	}

	if (args->altinfo_given) {
	  strncpy(&tag.information1[0], args->altinfo_arg, ALTTAGINFO_LEN);
	}

	if (args->second_image_flag_given) {
	  if (strncmp(args->second_image_flag_arg, "2", DUALFLAG_LEN) != 0) {		
		strncpy(tag.dualImage, args->second_image_flag_arg, DUALFLAG_LEN);
	  }
	}

	if (args->inactive_given) {
	  if (strncmp(args->inactive_arg, "2", INACTIVEFLAG_LEN) != 0) {		
		strncpy(tag.inactiveFlag, args->second_image_flag_arg, INACTIVEFLAG_LEN);
	  }
	}

	for (i = 0; i < NUM_PIRELLI; i++) {
		if (strncmp(args->boardid_arg, pirellitab[i], BOARDID_LEN) == 0) {
			is_pirelli = 1;
			break;
		}
	}

	if ( !is_pirelli ) {
	  int2tag(tag.imageCRC, kernelfscrc);
	} else {
	  int2tag(tag.imageCRC, kernelcrc);
	}

	int2tag(&(tag.rootfsCRC[0]), rootfscrc);
	int2tag(tag.kernelCRC, kernelcrc);
	int2tag(tag.fskernelCRC, kernelfscrc);
	int2tag(tag.headerCRC, crc32(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));

	fseek(binfile, 0L, SEEK_SET);
	fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);

    fflush(binfile);
	fclose(binfile);

	return 0;
}

int main(int argc, char **argv)
{
    int c, i;
	char *kernel, *rootfs, *bin;
	uint32_t flash_start, image_offset, block_size, load_address, entry;
	flash_start = image_offset = block_size = load_address = entry = 0;
	struct gengetopt_args_info parsed_args;

	kernel = rootfs = bin = NULL;

	if (cmdline_parser(argc, argv, &parsed_args)) {
	  exit(1);
	}

	printf("Broadcom 63xx image tagger - v2.0.0\n");
	printf("Copyright (C) 2008 Axel Gembe\n");
	printf("Copyright (C) 2009-2010 Daniel Dickinson\n");
	printf("Licensed under the terms of the Gnu General Public License\n");

	kernel = parsed_args.kernel_arg;
	rootfs = parsed_args.rootfs_arg;
	bin = parsed_args.output_arg;
	if (strlen(parsed_args.tag_version_arg) >= TAGVER_LEN) {
	  fprintf(stderr, "Error: Tag Version (tag_version,v) too long.\n");
	  exit(1);
	}
	if (strlen(parsed_args.boardid_arg) >= BOARDID_LEN) {
	  fprintf(stderr, "Error: Board ID (boardid,b) too long.\n");
	  exit(1);
	}
	if (strlen(parsed_args.chipid_arg) >= CHIPID_LEN) {
	  fprintf(stderr, "Error: Chip ID (chipid,c) too long.\n");
	  exit(1);
	}
	if (strlen(parsed_args.signature_arg) >= SIG1_LEN) {
	  fprintf(stderr, "Error: Magic string (signature,a) too long.\n");
	  exit(1);
	}
	if (strlen(parsed_args.signature2_arg) >= SIG2_LEN) {
	  fprintf(stderr, "Error: Second magic string (signature2,m) too long.\n");
	  exit(1);
	}
	if (parsed_args.layoutver_given) {
	  if (strlen(parsed_args.layoutver_arg) > FLASHLAYOUTVER_LEN) {
		fprintf(stderr, "Error: Flash layout version (layoutver,y) too long.\n");
		exit(1);
	  }
	}
	if (parsed_args.rsa_signature_given) {
	  if (strlen(parsed_args.rsa_signature_arg) > RSASIG_LEN) {
		fprintf(stderr, "Error: RSA Signature (rsa_signature,r) too long.\n");
		exit(1);
	  }
	}

	if (parsed_args.info1_given) {
	  if (strlen(parsed_args.info1_arg) >= TAGINFO1_LEN) {
		fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
		exit(1);
	  }
	}

	if (parsed_args.info2_given) {
	  if (strlen(parsed_args.info2_arg) >= TAGINFO2_LEN) {
		fprintf(stderr, "Error: Vendor Information 2 (info2) too long.\n");
		exit(1);
	  }
	}

	if (parsed_args.altinfo_given) {
	  if (strlen(parsed_args.altinfo_arg) >= ALTTAGINFO_LEN) {
		fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
		exit(1);
	  }
	}

	if (parsed_args.pad_given) {
	  if (parsed_args.pad_arg < 0) {
		fprintf(stderr, "Error: pad size must be positive.\r");
		exit(1);
	  }
	}

	flash_start = strtoul(parsed_args.flash_start_arg, NULL, 16);
	image_offset = strtoul(parsed_args.image_offset_arg, NULL, 16);
	block_size = strtoul(parsed_args.block_size_arg, NULL, 16);

	if (!parsed_args.kernel_file_has_header_flag) {
	  load_address = strtoul(parsed_args.load_addr_arg, NULL, 16);
	  entry = strtoul(parsed_args.entry_arg, NULL, 16);
	  if (load_address == 0) {
		fprintf(stderr, "Error: Invalid value for load address\n");
	  }
	  if (entry == 0) {
		fprintf(stderr, "Error: Invalid value for entry\n");
	  }
	}
	
	return tagfile(kernel, rootfs, bin, &parsed_args, flash_start, image_offset, block_size, load_address, entry);
}