From 8bd6b2229bf98761465020467ec33547d05bff46 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Sat, 31 May 2008 15:07:18 +0300 Subject: ihex: add ihex2fw tool for converting HEX files into firmware images Not the straight conversion to binary which objcopy can do for us, but actually representing each record with its original {addr, length}, because some drivers need that information preserved. Fix up 'firmware_install' to be able to build $(hostprogs-y) too. Signed-off-by: David Woodhouse --- firmware/ihex2fw.c | 247 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 247 insertions(+) create mode 100644 firmware/ihex2fw.c (limited to 'firmware/ihex2fw.c') diff --git a/firmware/ihex2fw.c b/firmware/ihex2fw.c new file mode 100644 index 0000000..9e77cd2 --- /dev/null +++ b/firmware/ihex2fw.c @@ -0,0 +1,247 @@ +/* + * Parser/loader for IHEX formatted data. + * + * Copyright © 2008 David Woodhouse + * Copyright © 2005 Jan Harkes + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct ihex_binrec { + struct ihex_binrec *next; /* not part of the real data structure */ + uint32_t addr; + uint16_t len; + uint8_t data[]; +}; + +/** + * nybble/hex are little helpers to parse hexadecimal numbers to a byte value + **/ +static uint8_t nybble(const uint8_t n) +{ + if (n >= '0' && n <= '9') return n - '0'; + else if (n >= 'A' && n <= 'F') return n - ('A' - 10); + else if (n >= 'a' && n <= 'f') return n - ('a' - 10); + return 0; +} + +static uint8_t hex(const uint8_t *data, uint8_t *crc) +{ + uint8_t val = (nybble(data[0]) << 4) | nybble(data[1]); + *crc += val; + return val; +} + +static int process_ihex(uint8_t *data, ssize_t size); +static void file_record(struct ihex_binrec *record); +static int output_records(int outfd); + +static int sort_records = 0; + +int main(int argc, char **argv) +{ + int infd, outfd; + struct stat st; + uint8_t *data; + + if (argc == 4 && !strcmp(argv[1], "-s")) { + sort_records = 1; + argc--; + argv++; + } + if (argc != 3) { + usage: + fprintf(stderr, "ihex2fw: Convert ihex files into binary " + "representation for use by Linux kernel\n"); + fprintf(stderr, "usage: ihex2fw [-s] \n"); + fprintf(stderr, " -s: sort records by address\n"); + return 1; + } + if (!strcmp(argv[1], "-")) + infd = 0; + else + infd = open(argv[1], O_RDONLY); + if (infd == -1) { + fprintf(stderr, "Failed to open source file: %s", + strerror(errno)); + goto usage; + } + if (fstat(infd, &st)) { + perror("stat"); + return 1; + } + data = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, infd, 0); + if (data == MAP_FAILED) { + perror("mmap"); + return 1; + } + + if (!strcmp(argv[2], "-")) + outfd = 1; + else + outfd = open(argv[2], O_TRUNC|O_CREAT|O_WRONLY, 0644); + if (outfd == -1) { + fprintf(stderr, "Failed to open destination file: %s", + strerror(errno)); + goto usage; + } + if (process_ihex(data, st.st_size)) + return 1; + + output_records(outfd); + return 0; +} + +static int process_ihex(uint8_t *data, ssize_t size) +{ + struct ihex_binrec *record; + uint32_t offset = 0; + uint8_t type, crc = 0, crcbyte = 0; + int i, j; + int line = 1; + int len; + + i = 0; +next_record: + /* search for the start of record character */ + while (i < size) { + if (data[i] == '\n') line++; + if (data[i++] == ':') break; + } + + /* Minimum record length would be about 10 characters */ + if (i + 10 > size) { + fprintf(stderr, "Can't find valid record at line %d\n", line); + return -EINVAL; + } + + len = hex(data + i, &crc); i += 2; + + record = malloc((sizeof (*record) + len + 3) & ~3); + if (!record) { + fprintf(stderr, "out of memory for records\n"); + return -ENOMEM; + } + memset(record, 0, (sizeof(*record) + len + 3) & ~3); + record->len = len; + + /* now check if we have enough data to read everything */ + if (i + 8 + (record->len * 2) > size) { + fprintf(stderr, "Not enough data to read complete record at line %d\n", + line); + return -EINVAL; + } + + record->addr = hex(data + i, &crc) << 8; i += 2; + record->addr |= hex(data + i, &crc); i += 2; + type = hex(data + i, &crc); i += 2; + + for (j = 0; j < record->len; j++, i += 2) + record->data[j] = hex(data + i, &crc); + + /* check CRC */ + crcbyte = hex(data + i, &crc); i += 2; + if (crc != 0) { + fprintf(stderr, "CRC failure at line %d: got 0x%X, expected 0x%X\n", + line, crcbyte, (unsigned char)(crcbyte-crc)); + return -EINVAL; + } + + /* Done reading the record */ + switch (type) { + case 0: + /* old style EOF record? */ + if (!record->len) + break; + + record->addr += offset; + file_record(record); + goto next_record; + + case 1: /* End-Of-File Record */ + if (record->addr || record->len) { + fprintf(stderr, "Bad EOF record (type 01) format at line %d", + line); + return -EINVAL; + } + break; + + case 2: /* Extended Segment Address Record (HEX86) */ + case 4: /* Extended Linear Address Record (HEX386) */ + if (record->addr || record->len != 2) { + fprintf(stderr, "Bad HEX86/HEX386 record (type %02X) at line %d\n", + type, line); + return -EINVAL; + } + + /* We shouldn't really be using the offset for HEX86 because + * the wraparound case is specified quite differently. */ + offset = record->data[0] << 8 | record->data[1]; + offset <<= (type == 2 ? 4 : 16); + goto next_record; + + case 3: /* Start Segment Address Record */ + case 5: /* Start Linear Address Record */ + if (record->addr || record->len != 4) { + fprintf(stderr, "Bad Start Address record (type %02X) at line %d\n", + type, line); + return -EINVAL; + } + + /* These records contain the CS/IP or EIP where execution + * starts. Don't really know what to do with them. */ + goto next_record; + + default: + fprintf(stderr, "Unknown record (type %02X)\n", type); + return -EINVAL; + } + + return 0; +} + +static struct ihex_binrec *records; + +static void file_record(struct ihex_binrec *record) +{ + struct ihex_binrec **p = &records; + + while ((*p) && (!sort_records || (*p)->addr < record->addr)) + p = &((*p)->next); + + record->next = *p; + *p = record; +} + +static int output_records(int outfd) +{ + unsigned char zeroes[5] = {0, 0, 0, 0, 0}; + struct ihex_binrec *p = records; + + while (p) { + uint16_t writelen = (p->len + 9) & ~3; + + p->addr = htonl(p->addr); + p->len = htonl(p->len); + write(outfd, &p->addr, writelen); + p = p->next; + } + /* EOF record is zero length, since we don't bother to represent + the type field in the binary version */ + write(outfd, zeroes, 5); + return 0; +} -- cgit v1.1