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>
25 struct ihex_binrec *next; /* not part of the real data structure */
32 * nybble/hex are little helpers to parse hexadecimal numbers to a byte value
34 static uint8_t nybble(const uint8_t n)
36 if (n >= '0' && n <= '9') return n - '0';
37 else if (n >= 'A' && n <= 'F') return n - ('A' - 10);
38 else if (n >= 'a' && n <= 'f') return n - ('a' - 10);
42 static uint8_t hex(const uint8_t *data, uint8_t *crc)
44 uint8_t val = (nybble(data[0]) << 4) | nybble(data[1]);
49 static int process_ihex(uint8_t *data, ssize_t size);
50 static void file_record(struct ihex_binrec *record);
51 static int output_records(int outfd);
53 static int sort_records = 0;
55 int main(int argc, char **argv)
61 if (argc == 4 && !strcmp(argv[1], "-s")) {
68 fprintf(stderr, "ihex2fw: Convert ihex files into binary "
69 "representation for use by Linux kernel\n");
70 fprintf(stderr, "usage: ihex2fw [-s] <src.HEX> <dst.fw>\n");
71 fprintf(stderr, " -s: sort records by address\n");
74 if (!strcmp(argv[1], "-"))
77 infd = open(argv[1], O_RDONLY);
79 fprintf(stderr, "Failed to open source file: %s",
83 if (fstat(infd, &st)) {
87 data = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, infd, 0);
88 if (data == MAP_FAILED) {
93 if (!strcmp(argv[2], "-"))
96 outfd = open(argv[2], O_TRUNC|O_CREAT|O_WRONLY, 0644);
98 fprintf(stderr, "Failed to open destination file: %s",
102 if (process_ihex(data, st.st_size))
105 output_records(outfd);
109 static int process_ihex(uint8_t *data, ssize_t size)
111 struct ihex_binrec *record;
113 uint8_t type, crc = 0, crcbyte = 0;
120 /* search for the start of record character */
122 if (data[i] == '\n') line++;
123 if (data[i++] == ':') break;
126 /* Minimum record length would be about 10 characters */
128 fprintf(stderr, "Can't find valid record at line %d\n", line);
132 len = hex(data + i, &crc); i += 2;
134 record = malloc((sizeof (*record) + len + 3) & ~3);
136 fprintf(stderr, "out of memory for records\n");
139 memset(record, 0, (sizeof(*record) + len + 3) & ~3);
142 /* now check if we have enough data to read everything */
143 if (i + 8 + (record->len * 2) > size) {
144 fprintf(stderr, "Not enough data to read complete record at line %d\n",
149 record->addr = hex(data + i, &crc) << 8; i += 2;
150 record->addr |= hex(data + i, &crc); i += 2;
151 type = hex(data + i, &crc); i += 2;
153 for (j = 0; j < record->len; j++, i += 2)
154 record->data[j] = hex(data + i, &crc);
157 crcbyte = hex(data + i, &crc); i += 2;
159 fprintf(stderr, "CRC failure at line %d: got 0x%X, expected 0x%X\n",
160 line, crcbyte, (unsigned char)(crcbyte-crc));
164 /* Done reading the record */
167 /* old style EOF record? */
171 record->addr += offset;
175 case 1: /* End-Of-File Record */
176 if (record->addr || record->len) {
177 fprintf(stderr, "Bad EOF record (type 01) format at line %d",
183 case 2: /* Extended Segment Address Record (HEX86) */
184 case 4: /* Extended Linear Address Record (HEX386) */
185 if (record->addr || record->len != 2) {
186 fprintf(stderr, "Bad HEX86/HEX386 record (type %02X) at line %d\n",
191 /* We shouldn't really be using the offset for HEX86 because
192 * the wraparound case is specified quite differently. */
193 offset = record->data[0] << 8 | record->data[1];
194 offset <<= (type == 2 ? 4 : 16);
197 case 3: /* Start Segment Address Record */
198 case 5: /* Start Linear Address Record */
199 if (record->addr || record->len != 4) {
200 fprintf(stderr, "Bad Start Address record (type %02X) at line %d\n",
205 /* These records contain the CS/IP or EIP where execution
206 * starts. Don't really know what to do with them. */
210 fprintf(stderr, "Unknown record (type %02X)\n", type);
217 static struct ihex_binrec *records;
219 static void file_record(struct ihex_binrec *record)
221 struct ihex_binrec **p = &records;
223 while ((*p) && (!sort_records || (*p)->addr < record->addr))
230 static int output_records(int outfd)
232 unsigned char zeroes[5] = {0, 0, 0, 0, 0};
233 struct ihex_binrec *p = records;
236 uint16_t writelen = (p->len + 9) & ~3;
238 p->addr = htonl(p->addr);
239 p->len = htonl(p->len);
240 write(outfd, &p->addr, writelen);
243 /* EOF record is zero length, since we don't bother to represent
244 the type field in the binary version */
245 write(outfd, zeroes, 5);