xref: /openbmc/u-boot/tools/mkimage.c (revision 518e2e1a) 
1 /*
2  * (C) Copyright 2000-2004
3  * DENX Software Engineering
4  * Wolfgang Denk, wd@denx.de
5  * All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License as
9  * published by the Free Software Foundation; either version 2 of
10  * the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20  * MA 02111-1307 USA
21  */
22 
23 #include <errno.h>
24 #include <fcntl.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #ifndef __WIN32__
29 #include <netinet/in.h>		/* for host / network byte order conversions	*/
30 #endif
31 #include <sys/mman.h>
32 #include <sys/stat.h>
33 #include <time.h>
34 #include <unistd.h>
35 
36 #if defined(__BEOS__) || defined(__NetBSD__) || defined(__APPLE__)
37 #include <inttypes.h>
38 #endif
39 
40 #ifdef __WIN32__
41 typedef unsigned int __u32;
42 
43 #define SWAP_LONG(x) \
44 	((__u32)( \
45 		(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
46 		(((__u32)(x) & (__u32)0x0000ff00UL) <<  8) | \
47 		(((__u32)(x) & (__u32)0x00ff0000UL) >>  8) | \
48 		(((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
49 typedef		unsigned char	uint8_t;
50 typedef		unsigned short	uint16_t;
51 typedef		unsigned int	uint32_t;
52 
53 #define     ntohl(a)	SWAP_LONG(a)
54 #define     htonl(a)	SWAP_LONG(a)
55 #endif	/* __WIN32__ */
56 
57 #ifndef	O_BINARY		/* should be define'd on __WIN32__ */
58 #define O_BINARY	0
59 #endif
60 
61 #include <image.h>
62 
63 extern int errno;
64 
65 #ifndef MAP_FAILED
66 #define MAP_FAILED (-1)
67 #endif
68 
69 char *cmdname;
70 
71 extern unsigned long crc32 (unsigned long crc, const char *buf, unsigned int len);
72 
73 typedef struct table_entry {
74 	int	val;		/* as defined in image.h	*/
75 	char	*sname;		/* short (input) name		*/
76 	char	*lname;		/* long (output) name		*/
77 } table_entry_t;
78 
79 table_entry_t arch_name[] = {
80     {	IH_CPU_INVALID,	NULL,		"Invalid CPU",		},
81     {	IH_CPU_ALPHA,	"alpha",	"Alpha",		},
82     {	IH_CPU_ARM,	"arm",		"ARM",			},
83     {	IH_CPU_I386,	"x86",		"Intel x86",		},
84     {	IH_CPU_IA64,	"ia64",		"IA64",			},
85     {	IH_CPU_MIPS,	"mips",		"MIPS",			},
86     {	IH_CPU_MIPS64,	"mips64",	"MIPS 64 Bit",		},
87     {	IH_CPU_PPC,	"ppc",		"PowerPC",		},
88     {	IH_CPU_S390,	"s390",		"IBM S390",		},
89     {	IH_CPU_SH,	"sh",		"SuperH",		},
90     {	IH_CPU_SPARC,	"sparc",	"SPARC",		},
91     {	IH_CPU_SPARC64,	"sparc64",	"SPARC 64 Bit",		},
92     {	IH_CPU_M68K,	"m68k",		"MC68000",		},
93     {	-1,		"",		"",			},
94 };
95 
96 table_entry_t os_name[] = {
97     {	IH_OS_INVALID,	NULL,		"Invalid OS",		},
98     {	IH_OS_OPENBSD,	"openbsd",	"OpenBSD",		},
99     {	IH_OS_NETBSD,	"netbsd",	"NetBSD",		},
100     {	IH_OS_FREEBSD,	"freebsd",	"FreeBSD",		},
101     {	IH_OS_4_4BSD,	"4_4bsd",	"4_4BSD",		},
102     {	IH_OS_LINUX,	"linux",	"Linux",		},
103     {	IH_OS_SVR4,	"svr4",		"SVR4",			},
104     {	IH_OS_ESIX,	"esix",		"Esix",			},
105     {	IH_OS_SOLARIS,	"solaris",	"Solaris",		},
106     {	IH_OS_IRIX,	"irix",		"Irix",			},
107     {	IH_OS_SCO,	"sco",		"SCO",			},
108     {	IH_OS_DELL,	"dell",		"Dell",			},
109     {	IH_OS_NCR,	"ncr",		"NCR",			},
110     {	IH_OS_LYNXOS,	"lynxos",	"LynxOS",		},
111     {	IH_OS_VXWORKS,	"vxworks",	"VxWorks",		},
112     {	IH_OS_PSOS,	"psos",		"pSOS",			},
113     {	IH_OS_QNX,	"qnx",		"QNX",			},
114     {	IH_OS_U_BOOT,	"u-boot",	"U-Boot",		},
115     {	IH_OS_RTEMS,	"rtems",	"RTEMS",		},
116     {	IH_OS_ARTOS,	"artos",	"ARTOS",		},
117     {	-1,		"",		"",			},
118 };
119 
120 table_entry_t type_name[] = {
121     {	IH_TYPE_INVALID,    NULL,	  "Invalid Image",	},
122     {	IH_TYPE_STANDALONE, "standalone", "Standalone Program", },
123     {	IH_TYPE_KERNEL,	    "kernel",	  "Kernel Image",	},
124     {	IH_TYPE_RAMDISK,    "ramdisk",	  "RAMDisk Image",	},
125     {	IH_TYPE_MULTI,	    "multi",	  "Multi-File Image",	},
126     {	IH_TYPE_FIRMWARE,   "firmware",	  "Firmware",		},
127     {	IH_TYPE_SCRIPT,     "script",	  "Script",		},
128     {	IH_TYPE_FILESYSTEM, "filesystem", "Filesystem Image",	},
129     {	-1,		    "",		  "",			},
130 };
131 
132 table_entry_t comp_name[] = {
133     {	IH_COMP_NONE,	"none",		"uncompressed",		},
134     {	IH_COMP_GZIP,	"gzip",		"gzip compressed",	},
135     {	IH_COMP_BZIP2,	"bzip2",	"bzip2 compressed",	},
136     {	-1,		"",		"",			},
137 };
138 
139 static	void	copy_file (int, const char *, int);
140 static	void	usage	(void);
141 static	void	print_header (image_header_t *);
142 static	void	print_type (image_header_t *);
143 static	char	*put_table_entry (table_entry_t *, char *, int);
144 static	char	*put_arch (int);
145 static	char	*put_type (int);
146 static	char	*put_os   (int);
147 static	char	*put_comp (int);
148 static	int	get_table_entry (table_entry_t *, char *, char *);
149 static	int	get_arch(char *);
150 static	int	get_comp(char *);
151 static	int	get_os  (char *);
152 static	int	get_type(char *);
153 
154 
155 char	*datafile;
156 char	*imagefile;
157 
158 int dflag    = 0;
159 int eflag    = 0;
160 int lflag    = 0;
161 int vflag    = 0;
162 int xflag    = 0;
163 int opt_os   = IH_OS_LINUX;
164 int opt_arch = IH_CPU_PPC;
165 int opt_type = IH_TYPE_KERNEL;
166 int opt_comp = IH_COMP_GZIP;
167 
168 image_header_t header;
169 image_header_t *hdr = &header;
170 
171 int
172 main (int argc, char **argv)
173 {
174 	int ifd;
175 	uint32_t checksum;
176 	uint32_t addr;
177 	uint32_t ep;
178 	struct stat sbuf;
179 	unsigned char *ptr;
180 	char *name = "";
181 
182 	cmdname = *argv;
183 
184 	addr = ep = 0;
185 
186 	while (--argc > 0 && **++argv == '-') {
187 		while (*++*argv) {
188 			switch (**argv) {
189 			case 'l':
190 				lflag = 1;
191 				break;
192 			case 'A':
193 				if ((--argc <= 0) ||
194 				    (opt_arch = get_arch(*++argv)) < 0)
195 					usage ();
196 				goto NXTARG;
197 			case 'C':
198 				if ((--argc <= 0) ||
199 				    (opt_comp = get_comp(*++argv)) < 0)
200 					usage ();
201 				goto NXTARG;
202 			case 'O':
203 				if ((--argc <= 0) ||
204 				    (opt_os = get_os(*++argv)) < 0)
205 					usage ();
206 				goto NXTARG;
207 			case 'T':
208 				if ((--argc <= 0) ||
209 				    (opt_type = get_type(*++argv)) < 0)
210 					usage ();
211 				goto NXTARG;
212 
213 			case 'a':
214 				if (--argc <= 0)
215 					usage ();
216 				addr = strtoul (*++argv, (char **)&ptr, 16);
217 				if (*ptr) {
218 					fprintf (stderr,
219 						"%s: invalid load address %s\n",
220 						cmdname, *argv);
221 					exit (EXIT_FAILURE);
222 				}
223 				goto NXTARG;
224 			case 'd':
225 				if (--argc <= 0)
226 					usage ();
227 				datafile = *++argv;
228 				dflag = 1;
229 				goto NXTARG;
230 			case 'e':
231 				if (--argc <= 0)
232 					usage ();
233 				ep = strtoul (*++argv, (char **)&ptr, 16);
234 				if (*ptr) {
235 					fprintf (stderr,
236 						"%s: invalid entry point %s\n",
237 						cmdname, *argv);
238 					exit (EXIT_FAILURE);
239 				}
240 				eflag = 1;
241 				goto NXTARG;
242 			case 'n':
243 				if (--argc <= 0)
244 					usage ();
245 				name = *++argv;
246 				goto NXTARG;
247 			case 'v':
248 				vflag++;
249 				break;
250 			case 'x':
251 				xflag++;
252 				break;
253 			default:
254 				usage ();
255 			}
256 		}
257 NXTARG:		;
258 	}
259 
260 	if ((argc != 1) || ((lflag ^ dflag) == 0))
261 		usage();
262 
263 	if (!eflag) {
264 		ep = addr;
265 		/* If XIP, entry point must be after the U-Boot header */
266 		if (xflag)
267 			ep += sizeof(image_header_t);
268 	}
269 
270 	/*
271 	 * If XIP, ensure the entry point is equal to the load address plus
272 	 * the size of the U-Boot header.
273 	 */
274 	if (xflag) {
275 		if (ep != addr + sizeof(image_header_t)) {
276 			fprintf (stderr, "%s: For XIP, the entry point must be the load addr + %lu\n",
277 				cmdname,
278 				(unsigned long)sizeof(image_header_t));
279 			exit (EXIT_FAILURE);
280 		}
281 	}
282 
283 	imagefile = *argv;
284 
285 	if (lflag) {
286 		ifd = open(imagefile, O_RDONLY|O_BINARY);
287 	} else {
288 		ifd = open(imagefile, O_RDWR|O_CREAT|O_TRUNC|O_BINARY, 0666);
289 	}
290 
291 	if (ifd < 0) {
292 		fprintf (stderr, "%s: Can't open %s: %s\n",
293 			cmdname, imagefile, strerror(errno));
294 		exit (EXIT_FAILURE);
295 	}
296 
297 	if (lflag) {
298 		int len;
299 		char *data;
300 		/*
301 		 * list header information of existing image
302 		 */
303 		if (fstat(ifd, &sbuf) < 0) {
304 			fprintf (stderr, "%s: Can't stat %s: %s\n",
305 				cmdname, imagefile, strerror(errno));
306 			exit (EXIT_FAILURE);
307 		}
308 
309 		if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
310 			fprintf (stderr,
311 				"%s: Bad size: \"%s\" is no valid image\n",
312 				cmdname, imagefile);
313 			exit (EXIT_FAILURE);
314 		}
315 
316 		ptr = (unsigned char *)mmap(0, sbuf.st_size,
317 					    PROT_READ, MAP_SHARED, ifd, 0);
318 		if ((caddr_t)ptr == (caddr_t)-1) {
319 			fprintf (stderr, "%s: Can't read %s: %s\n",
320 				cmdname, imagefile, strerror(errno));
321 			exit (EXIT_FAILURE);
322 		}
323 
324 		/*
325 		 * create copy of header so that we can blank out the
326 		 * checksum field for checking - this can't be done
327 		 * on the PROT_READ mapped data.
328 		 */
329 		memcpy (hdr, ptr, sizeof(image_header_t));
330 
331 		if (ntohl(hdr->ih_magic) != IH_MAGIC) {
332 			fprintf (stderr,
333 				"%s: Bad Magic Number: \"%s\" is no valid image\n",
334 				cmdname, imagefile);
335 			exit (EXIT_FAILURE);
336 		}
337 
338 		data = (char *)hdr;
339 		len  = sizeof(image_header_t);
340 
341 		checksum = ntohl(hdr->ih_hcrc);
342 		hdr->ih_hcrc = htonl(0);	/* clear for re-calculation */
343 
344 		if (crc32 (0, data, len) != checksum) {
345 			fprintf (stderr,
346 				"*** Warning: \"%s\" has bad header checksum!\n",
347 				imagefile);
348 		}
349 
350 		data = (char *)(ptr + sizeof(image_header_t));
351 		len  = sbuf.st_size - sizeof(image_header_t) ;
352 
353 		if (crc32 (0, data, len) != ntohl(hdr->ih_dcrc)) {
354 			fprintf (stderr,
355 				"*** Warning: \"%s\" has corrupted data!\n",
356 				imagefile);
357 		}
358 
359 		/* for multi-file images we need the data part, too */
360 		print_header ((image_header_t *)ptr);
361 
362 		(void) munmap((void *)ptr, sbuf.st_size);
363 		(void) close (ifd);
364 
365 		exit (EXIT_SUCCESS);
366 	}
367 
368 	/*
369 	 * Must be -w then:
370 	 *
371 	 * write dummy header, to be fixed later
372 	 */
373 	memset (hdr, 0, sizeof(image_header_t));
374 
375 	if (write(ifd, hdr, sizeof(image_header_t)) != sizeof(image_header_t)) {
376 		fprintf (stderr, "%s: Write error on %s: %s\n",
377 			cmdname, imagefile, strerror(errno));
378 		exit (EXIT_FAILURE);
379 	}
380 
381 	if (opt_type == IH_TYPE_MULTI || opt_type == IH_TYPE_SCRIPT) {
382 		char *file = datafile;
383 		unsigned long size;
384 
385 		for (;;) {
386 			char *sep = NULL;
387 
388 			if (file) {
389 				if ((sep = strchr(file, ':')) != NULL) {
390 					*sep = '\0';
391 				}
392 
393 				if (stat (file, &sbuf) < 0) {
394 					fprintf (stderr, "%s: Can't stat %s: %s\n",
395 						cmdname, file, strerror(errno));
396 					exit (EXIT_FAILURE);
397 				}
398 				size = htonl(sbuf.st_size);
399 			} else {
400 				size = 0;
401 			}
402 
403 			if (write(ifd, (char *)&size, sizeof(size)) != sizeof(size)) {
404 				fprintf (stderr, "%s: Write error on %s: %s\n",
405 					cmdname, imagefile, strerror(errno));
406 				exit (EXIT_FAILURE);
407 			}
408 
409 			if (!file) {
410 				break;
411 			}
412 
413 			if (sep) {
414 				*sep = ':';
415 				file = sep + 1;
416 			} else {
417 				file = NULL;
418 			}
419 		}
420 
421 		file = datafile;
422 
423 		for (;;) {
424 			char *sep = strchr(file, ':');
425 			if (sep) {
426 				*sep = '\0';
427 				copy_file (ifd, file, 1);
428 				*sep++ = ':';
429 				file = sep;
430 			} else {
431 				copy_file (ifd, file, 0);
432 				break;
433 			}
434 		}
435 	} else {
436 		copy_file (ifd, datafile, 0);
437 	}
438 
439 	/* We're a bit of paranoid */
440 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
441 	(void) fdatasync (ifd);
442 #else
443 	(void) fsync (ifd);
444 #endif
445 
446 	if (fstat(ifd, &sbuf) < 0) {
447 		fprintf (stderr, "%s: Can't stat %s: %s\n",
448 			cmdname, imagefile, strerror(errno));
449 		exit (EXIT_FAILURE);
450 	}
451 
452 	ptr = (unsigned char *)mmap(0, sbuf.st_size,
453 				    PROT_READ|PROT_WRITE, MAP_SHARED, ifd, 0);
454 	if (ptr == (unsigned char *)MAP_FAILED) {
455 		fprintf (stderr, "%s: Can't map %s: %s\n",
456 			cmdname, imagefile, strerror(errno));
457 		exit (EXIT_FAILURE);
458 	}
459 
460 	hdr = (image_header_t *)ptr;
461 
462 	checksum = crc32 (0,
463 			  (const char *)(ptr + sizeof(image_header_t)),
464 			  sbuf.st_size - sizeof(image_header_t)
465 			 );
466 
467 	/* Build new header */
468 	hdr->ih_magic = htonl(IH_MAGIC);
469 	hdr->ih_time  = htonl(sbuf.st_mtime);
470 	hdr->ih_size  = htonl(sbuf.st_size - sizeof(image_header_t));
471 	hdr->ih_load  = htonl(addr);
472 	hdr->ih_ep    = htonl(ep);
473 	hdr->ih_dcrc  = htonl(checksum);
474 	hdr->ih_os    = opt_os;
475 	hdr->ih_arch  = opt_arch;
476 	hdr->ih_type  = opt_type;
477 	hdr->ih_comp  = opt_comp;
478 
479 	strncpy((char *)hdr->ih_name, name, IH_NMLEN);
480 
481 	checksum = crc32(0,(const char *)hdr,sizeof(image_header_t));
482 
483 	hdr->ih_hcrc = htonl(checksum);
484 
485 	print_header (hdr);
486 
487 	(void) munmap((void *)ptr, sbuf.st_size);
488 
489 	/* We're a bit of paranoid */
490 #if defined(_POSIX_SYNCHRONIZED_IO) && !defined(__sun__) && !defined(__FreeBSD__)
491 	(void) fdatasync (ifd);
492 #else
493 	(void) fsync (ifd);
494 #endif
495 
496 	if (close(ifd)) {
497 		fprintf (stderr, "%s: Write error on %s: %s\n",
498 			cmdname, imagefile, strerror(errno));
499 		exit (EXIT_FAILURE);
500 	}
501 
502 	exit (EXIT_SUCCESS);
503 }
504 
505 static void
506 copy_file (int ifd, const char *datafile, int pad)
507 {
508 	int dfd;
509 	struct stat sbuf;
510 	unsigned char *ptr;
511 	int tail;
512 	int zero = 0;
513 	int offset = 0;
514 	int size;
515 
516 	if (vflag) {
517 		fprintf (stderr, "Adding Image %s\n", datafile);
518 	}
519 
520 	if ((dfd = open(datafile, O_RDONLY|O_BINARY)) < 0) {
521 		fprintf (stderr, "%s: Can't open %s: %s\n",
522 			cmdname, datafile, strerror(errno));
523 		exit (EXIT_FAILURE);
524 	}
525 
526 	if (fstat(dfd, &sbuf) < 0) {
527 		fprintf (stderr, "%s: Can't stat %s: %s\n",
528 			cmdname, datafile, strerror(errno));
529 		exit (EXIT_FAILURE);
530 	}
531 
532 	ptr = (unsigned char *)mmap(0, sbuf.st_size,
533 				    PROT_READ, MAP_SHARED, dfd, 0);
534 	if (ptr == (unsigned char *)MAP_FAILED) {
535 		fprintf (stderr, "%s: Can't read %s: %s\n",
536 			cmdname, datafile, strerror(errno));
537 		exit (EXIT_FAILURE);
538 	}
539 
540 	if (xflag) {
541 		unsigned char *p = NULL;
542 		/*
543 		 * XIP: do not append the image_header_t at the
544 		 * beginning of the file, but consume the space
545 		 * reserved for it.
546 		 */
547 
548 		if ((unsigned)sbuf.st_size < sizeof(image_header_t)) {
549 			fprintf (stderr,
550 				"%s: Bad size: \"%s\" is too small for XIP\n",
551 				cmdname, datafile);
552 			exit (EXIT_FAILURE);
553 		}
554 
555 		for (p=ptr; p < ptr+sizeof(image_header_t); p++) {
556 			if ( *p != 0xff ) {
557 				fprintf (stderr,
558 					"%s: Bad file: \"%s\" has invalid buffer for XIP\n",
559 					cmdname, datafile);
560 				exit (EXIT_FAILURE);
561 			}
562 		}
563 
564 		offset = sizeof(image_header_t);
565 	}
566 
567 	size = sbuf.st_size - offset;
568 	if (write(ifd, ptr + offset, size) != size) {
569 		fprintf (stderr, "%s: Write error on %s: %s\n",
570 			cmdname, imagefile, strerror(errno));
571 		exit (EXIT_FAILURE);
572 	}
573 
574 	if (pad && ((tail = size % 4) != 0)) {
575 
576 		if (write(ifd, (char *)&zero, 4-tail) != 4-tail) {
577 			fprintf (stderr, "%s: Write error on %s: %s\n",
578 				cmdname, imagefile, strerror(errno));
579 			exit (EXIT_FAILURE);
580 		}
581 	}
582 
583 	(void) munmap((void *)ptr, sbuf.st_size);
584 	(void) close (dfd);
585 }
586 
587 void
588 usage ()
589 {
590 	fprintf (stderr, "Usage: %s -l image\n"
591 			 "          -l ==> list image header information\n"
592 			 "       %s -A arch -O os -T type -C comp "
593 			 "-a addr -e ep -n name -d data_file[:data_file...] image\n",
594 		cmdname, cmdname);
595 	fprintf (stderr, "          -A ==> set architecture to 'arch'\n"
596 			 "          -O ==> set operating system to 'os'\n"
597 			 "          -T ==> set image type to 'type'\n"
598 			 "          -C ==> set compression type 'comp'\n"
599 			 "          -a ==> set load address to 'addr' (hex)\n"
600 			 "          -e ==> set entry point to 'ep' (hex)\n"
601 			 "          -n ==> set image name to 'name'\n"
602 			 "          -d ==> use image data from 'datafile'\n"
603 			 "          -x ==> set XIP (execute in place)\n"
604 		);
605 	exit (EXIT_FAILURE);
606 }
607 
608 static void
609 print_header (image_header_t *hdr)
610 {
611 	time_t timestamp;
612 	uint32_t size;
613 
614 	timestamp = (time_t)ntohl(hdr->ih_time);
615 	size = ntohl(hdr->ih_size);
616 
617 	printf ("Image Name:   %.*s\n", IH_NMLEN, hdr->ih_name);
618 	printf ("Created:      %s", ctime(&timestamp));
619 	printf ("Image Type:   "); print_type(hdr);
620 	printf ("Data Size:    %d Bytes = %.2f kB = %.2f MB\n",
621 		size, (double)size / 1.024e3, (double)size / 1.048576e6 );
622 	printf ("Load Address: 0x%08X\n", ntohl(hdr->ih_load));
623 	printf ("Entry Point:  0x%08X\n", ntohl(hdr->ih_ep));
624 
625 	if (hdr->ih_type == IH_TYPE_MULTI || hdr->ih_type == IH_TYPE_SCRIPT) {
626 		int i, ptrs;
627 		uint32_t pos;
628 		unsigned long *len_ptr = (unsigned long *) (
629 					(unsigned long)hdr + sizeof(image_header_t)
630 				);
631 
632 		/* determine number of images first (to calculate image offsets) */
633 		for (i=0; len_ptr[i]; ++i)	/* null pointer terminates list */
634 			;
635 		ptrs = i;		/* null pointer terminates list */
636 
637 		pos = sizeof(image_header_t) + ptrs * sizeof(long);
638 		printf ("Contents:\n");
639 		for (i=0; len_ptr[i]; ++i) {
640 			size = ntohl(len_ptr[i]);
641 
642 			printf ("   Image %d: %8d Bytes = %4d kB = %d MB\n",
643 				i, size, size>>10, size>>20);
644 			if (hdr->ih_type == IH_TYPE_SCRIPT && i > 0) {
645 				/*
646 				 * the user may need to know offsets
647 				 * if planning to do something with
648 				 * multiple files
649 				 */
650 				printf ("    Offset = %08X\n", pos);
651 			}
652 			/* copy_file() will pad the first files to even word align */
653 			size += 3;
654 			size &= ~3;
655 			pos += size;
656 		}
657 	}
658 }
659 
660 
661 static void
662 print_type (image_header_t *hdr)
663 {
664 	printf ("%s %s %s (%s)\n",
665 		put_arch (hdr->ih_arch),
666 		put_os   (hdr->ih_os  ),
667 		put_type (hdr->ih_type),
668 		put_comp (hdr->ih_comp)
669 	);
670 }
671 
672 static char *put_arch (int arch)
673 {
674 	return (put_table_entry(arch_name, "Unknown Architecture", arch));
675 }
676 
677 static char *put_os (int os)
678 {
679 	return (put_table_entry(os_name, "Unknown OS", os));
680 }
681 
682 static char *put_type (int type)
683 {
684 	return (put_table_entry(type_name, "Unknown Image", type));
685 }
686 
687 static char *put_comp (int comp)
688 {
689 	return (put_table_entry(comp_name, "Unknown Compression", comp));
690 }
691 
692 static char *put_table_entry (table_entry_t *table, char *msg, int type)
693 {
694 	for (; table->val>=0; ++table) {
695 		if (table->val == type)
696 			return (table->lname);
697 	}
698 	return (msg);
699 }
700 
701 static int get_arch(char *name)
702 {
703 	return (get_table_entry(arch_name, "CPU", name));
704 }
705 
706 
707 static int get_comp(char *name)
708 {
709 	return (get_table_entry(comp_name, "Compression", name));
710 }
711 
712 
713 static int get_os (char *name)
714 {
715 	return (get_table_entry(os_name, "OS", name));
716 }
717 
718 
719 static int get_type(char *name)
720 {
721 	return (get_table_entry(type_name, "Image", name));
722 }
723 
724 static int get_table_entry (table_entry_t *table, char *msg, char *name)
725 {
726 	table_entry_t *t;
727 	int first = 1;
728 
729 	for (t=table; t->val>=0; ++t) {
730 		if (t->sname && strcasecmp(t->sname, name)==0)
731 			return (t->val);
732 	}
733 	fprintf (stderr, "\nInvalid %s Type - valid names are", msg);
734 	for (t=table; t->val>=0; ++t) {
735 		if (t->sname == NULL)
736 			continue;
737 		fprintf (stderr, "%c %s", (first) ? ':' : ',', t->sname);
738 		first = 0;
739 	}
740 	fprintf (stderr, "\n");
741 	return (-1);
742 }
743