2 * Parser/loader for IHEX formatted data.
4 * Copyright © 2008 David Woodhouse <dwmw2@infradead.org>
5 * Copyright © 2005 Jan Harkes <jaharkes@cs.cmu.edu>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
13 #include <arpa/inet.h>
16 #include <sys/types.h>
28 struct ihex_binrec
*next
; /* not part of the real data structure */
35 * nybble/hex are little helpers to parse hexadecimal numbers to a byte value
37 static uint8_t nybble(const uint8_t n
)
39 if (n
>= '0' && n
<= '9') return n
- '0';
40 else if (n
>= 'A' && n
<= 'F') return n
- ('A' - 10);
41 else if (n
>= 'a' && n
<= 'f') return n
- ('a' - 10);
45 static uint8_t hex(const uint8_t *data
, uint8_t *crc
)
47 uint8_t val
= (nybble(data
[0]) << 4) | nybble(data
[1]);
52 static int process_ihex(uint8_t *data
, ssize_t size
);
53 static void file_record(struct ihex_binrec
*record
);
54 static int output_records(int outfd
);
56 static int sort_records
= 0;
57 static int wide_records
= 0;
58 static int include_jump
= 0;
60 static int usage(void)
62 fprintf(stderr
, "ihex2fw: Convert ihex files into binary "
63 "representation for use by Linux kernel\n");
64 fprintf(stderr
, "usage: ihex2fw [<options>] <src.HEX> <dst.fw>\n");
65 fprintf(stderr
, " -w: wide records (16-bit length)\n");
66 fprintf(stderr
, " -s: sort records by address\n");
67 fprintf(stderr
, " -j: include records for CS:IP/EIP address\n");
71 int main(int argc
, char **argv
)
78 while ((opt
= getopt(argc
, argv
, "wsj")) != -1) {
93 if (optind
+ 2 != argc
)
96 if (!strcmp(argv
[optind
], "-"))
99 infd
= open(argv
[optind
], O_RDONLY
);
101 fprintf(stderr
, "Failed to open source file: %s",
105 if (fstat(infd
, &st
)) {
109 data
= mmap(NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
, infd
, 0);
110 if (data
== MAP_FAILED
) {
115 if (!strcmp(argv
[optind
+1], "-"))
118 outfd
= open(argv
[optind
+1], O_TRUNC
|O_CREAT
|O_WRONLY
, 0644);
120 fprintf(stderr
, "Failed to open destination file: %s",
124 if (process_ihex(data
, st
.st_size
))
127 return output_records(outfd
);
130 static int process_ihex(uint8_t *data
, ssize_t size
)
132 struct ihex_binrec
*record
;
135 uint8_t type
, crc
= 0, crcbyte
= 0;
142 /* search for the start of record character */
144 if (data
[i
] == '\n') line
++;
145 if (data
[i
++] == ':') break;
148 /* Minimum record length would be about 10 characters */
150 fprintf(stderr
, "Can't find valid record at line %d\n", line
);
154 len
= hex(data
+ i
, &crc
); i
+= 2;
157 len
+= hex(data
+ i
, &crc
); i
+= 2;
159 record
= malloc((sizeof (*record
) + len
+ 3) & ~3);
161 fprintf(stderr
, "out of memory for records\n");
164 memset(record
, 0, (sizeof(*record
) + len
+ 3) & ~3);
167 /* now check if we have enough data to read everything */
168 if (i
+ 8 + (record
->len
* 2) > size
) {
169 fprintf(stderr
, "Not enough data to read complete record at line %d\n",
174 record
->addr
= hex(data
+ i
, &crc
) << 8; i
+= 2;
175 record
->addr
|= hex(data
+ i
, &crc
); i
+= 2;
176 type
= hex(data
+ i
, &crc
); i
+= 2;
178 for (j
= 0; j
< record
->len
; j
++, i
+= 2)
179 record
->data
[j
] = hex(data
+ i
, &crc
);
182 crcbyte
= hex(data
+ i
, &crc
); i
+= 2;
184 fprintf(stderr
, "CRC failure at line %d: got 0x%X, expected 0x%X\n",
185 line
, crcbyte
, (unsigned char)(crcbyte
-crc
));
189 /* Done reading the record */
192 /* old style EOF record? */
196 record
->addr
+= offset
;
200 case 1: /* End-Of-File Record */
201 if (record
->addr
|| record
->len
) {
202 fprintf(stderr
, "Bad EOF record (type 01) format at line %d",
208 case 2: /* Extended Segment Address Record (HEX86) */
209 case 4: /* Extended Linear Address Record (HEX386) */
210 if (record
->addr
|| record
->len
!= 2) {
211 fprintf(stderr
, "Bad HEX86/HEX386 record (type %02X) at line %d\n",
216 /* We shouldn't really be using the offset for HEX86 because
217 * the wraparound case is specified quite differently. */
218 offset
= record
->data
[0] << 8 | record
->data
[1];
219 offset
<<= (type
== 2 ? 4 : 16);
222 case 3: /* Start Segment Address Record */
223 case 5: /* Start Linear Address Record */
224 if (record
->addr
|| record
->len
!= 4) {
225 fprintf(stderr
, "Bad Start Address record (type %02X) at line %d\n",
230 memcpy(&data32
, &record
->data
[0], sizeof(data32
));
231 data32
= htonl(data32
);
232 memcpy(&record
->data
[0], &data32
, sizeof(data32
));
234 /* These records contain the CS/IP or EIP where execution
235 * starts. If requested output this as a record. */
241 fprintf(stderr
, "Unknown record (type %02X)\n", type
);
248 static struct ihex_binrec
*records
;
250 static void file_record(struct ihex_binrec
*record
)
252 struct ihex_binrec
**p
= &records
;
254 while ((*p
) && (!sort_records
|| (*p
)->addr
< record
->addr
))
261 static int output_records(int outfd
)
263 unsigned char zeroes
[6] = {0, 0, 0, 0, 0, 0};
264 struct ihex_binrec
*p
= records
;
267 uint16_t writelen
= (p
->len
+ 9) & ~3;
269 p
->addr
= htonl(p
->addr
);
270 p
->len
= htons(p
->len
);
271 if (write(outfd
, &p
->addr
, writelen
) != writelen
)
275 /* EOF record is zero length, since we don't bother to represent
276 the type field in the binary version */
277 if (write(outfd
, zeroes
, 6) != 6)
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