tools/firmware/ihex2fw.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Parser/loader for IHEX formatted data.
  *
  * Copyright © 2008 David Woodhouse <dwmw2@infradead.org>
  * Copyright © 2005 Jan Harkes <jaharkes@cs.cmu.edu>
  */

 #include <stdint.h>
 #include <arpa/inet.h>
 #include <stdio.h>
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>
 #include <stdlib.h>
 #define _GNU_SOURCE
 #include <getopt.h>


 #define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))
 #define __ALIGN_KERNEL(x, a)		__ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
 #define ALIGN(x, a)			__ALIGN_KERNEL((x), (a))

 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;
 static int wide_records = 0;
 static int include_jump = 0;

 static int usage(void)
 {
 	fprintf(stderr, "ihex2fw: Convert ihex files into binary "
 		"representation for use by Linux kernel\n");
 	fprintf(stderr, "usage: ihex2fw [<options>] <src.HEX> <dst.fw>\n");
 	fprintf(stderr, "       -w: wide records (16-bit length)\n");
 	fprintf(stderr, "       -s: sort records by address\n");
 	fprintf(stderr, "       -j: include records for CS:IP/EIP address\n");
 	return 1;
 }

 int main(int argc, char **argv)
 {
 	int infd, outfd;
 	struct stat st;
 	uint8_t *data;
 	int opt;

 	while ((opt = getopt(argc, argv, "wsj")) != -1) {
 		switch (opt) {
 		case 'w':
 			wide_records = 1;
 			break;
 		case 's':
 			sort_records = 1;
 			break;
 		case 'j':
 			include_jump = 1;
 			break;
 		default:
 			return usage();
 		}
 	}

 	if (optind + 2 != argc)
 		return usage();

 	if (!strcmp(argv[optind], "-"))
 		infd = 0;
 	else
 		infd = open(argv[optind], O_RDONLY);
 	if (infd == -1) {
 		fprintf(stderr, "Failed to open source file: %s",
 			strerror(errno));
 		return 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[optind+1], "-"))
 		outfd = 1;
 	else
 		outfd = open(argv[optind+1], O_TRUNC|O_CREAT|O_WRONLY, 0644);
 	if (outfd == -1) {
 		fprintf(stderr, "Failed to open destination file: %s",
 			strerror(errno));
 		return usage();
 	}
 	if (process_ihex(data, st.st_size))
 		return 1;

 	return output_records(outfd);
 }

 static int process_ihex(uint8_t *data, ssize_t size)
 {
 	struct ihex_binrec *record;
 	size_t record_size;
 	uint32_t offset = 0;
 	uint32_t data32;
 	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;
 	if (wide_records) {
 		len <<= 8;
 		len += hex(data + i, &crc); i += 2;
 	}
 	record_size = ALIGN(sizeof(*record) + len, 4);
 	record = malloc(record_size);
 	if (!record) {
 		fprintf(stderr, "out of memory for records\n");
 		return -ENOMEM;
 	}
 	memset(record, 0, record_size);
 	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;
 		}

 		memcpy(&data32, &record->data[0], sizeof(data32));
 		data32 = htonl(data32);
 		memcpy(&record->data[0], &data32, sizeof(data32));

 		/* These records contain the CS/IP or EIP where execution
 		 * starts. If requested output this as a record. */
 		if (include_jump)
 			file_record(record);
 		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 uint16_t ihex_binrec_size(struct ihex_binrec *p)
 {
 	return p->len + sizeof(p->addr) + sizeof(p->len);
 }

 static int output_records(int outfd)
 {
 	unsigned char zeroes[6] = {0, 0, 0, 0, 0, 0};
 	struct ihex_binrec *p = records;

 	while (p) {
 		uint16_t writelen = ALIGN(ihex_binrec_size(p), 4);

 		p->addr = htonl(p->addr);
 		p->len = htons(p->len);
 		if (write(outfd, &p->addr, writelen) != writelen)
 			return 1;
 		p = p->next;
 	}
 	/* EOF record is zero length, since we don't bother to represent
 	   the type field in the binary version */
 	if (write(outfd, zeroes, 6) != 6)
 		return 1;
 	return 0;
 }
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Parser/loader for IHEX formatted data.
	*
	* Copyright © 2008 David Woodhouse <dwmw2@infradead.org>
	* Copyright © 2005 Jan Harkes <jaharkes@cs.cmu.edu>
	*/

	#include <stdint.h>
	#include <arpa/inet.h>
	#include <stdio.h>
	#include <errno.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <sys/mman.h>
	#include <fcntl.h>
	#include <string.h>
	#include <unistd.h>
	#include <stdlib.h>
	#define _GNU_SOURCE
	#include <getopt.h>


	#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
	#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
	#define ALIGN(x, a) __ALIGN_KERNEL((x), (a))

	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;
	static int wide_records = 0;
	static int include_jump = 0;

	static int usage(void)
	{
	fprintf(stderr, "ihex2fw: Convert ihex files into binary "
	"representation for use by Linux kernel\n");
	fprintf(stderr, "usage: ihex2fw [<options>] <src.HEX> <dst.fw>\n");
	fprintf(stderr, " -w: wide records (16-bit length)\n");
	fprintf(stderr, " -s: sort records by address\n");
	fprintf(stderr, " -j: include records for CS:IP/EIP address\n");
	return 1;
	}

	int main(int argc, char **argv)
	{
	int infd, outfd;
	struct stat st;
	uint8_t *data;
	int opt;

	while ((opt = getopt(argc, argv, "wsj")) != -1) {
	switch (opt) {
	case 'w':
	wide_records = 1;
	break;
	case 's':
	sort_records = 1;
	break;
	case 'j':
	include_jump = 1;
	break;
	default:
	return usage();
	}
	}

	if (optind + 2 != argc)
	return usage();

	if (!strcmp(argv[optind], "-"))
	infd = 0;
	else
	infd = open(argv[optind], O_RDONLY);
	if (infd == -1) {
	fprintf(stderr, "Failed to open source file: %s",
	strerror(errno));
	return 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[optind+1], "-"))
	outfd = 1;
	else
	outfd = open(argv[optind+1], O_TRUNC\|O_CREAT\|O_WRONLY, 0644);
	if (outfd == -1) {
	fprintf(stderr, "Failed to open destination file: %s",
	strerror(errno));
	return usage();
	}
	if (process_ihex(data, st.st_size))
	return 1;

	return output_records(outfd);
	}

	static int process_ihex(uint8_t *data, ssize_t size)
	{
	struct ihex_binrec *record;
	size_t record_size;
	uint32_t offset = 0;
	uint32_t data32;
	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;
	if (wide_records) {
	len <<= 8;
	len += hex(data + i, &crc); i += 2;
	}
	record_size = ALIGN(sizeof(*record) + len, 4);
	record = malloc(record_size);
	if (!record) {
	fprintf(stderr, "out of memory for records\n");
	return -ENOMEM;
	}
	memset(record, 0, record_size);
	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;
	}

	memcpy(&data32, &record->data[0], sizeof(data32));
	data32 = htonl(data32);
	memcpy(&record->data[0], &data32, sizeof(data32));

	/* These records contain the CS/IP or EIP where execution
	* starts. If requested output this as a record. */
	if (include_jump)
	file_record(record);
	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 uint16_t ihex_binrec_size(struct ihex_binrec *p)
	{
	return p->len + sizeof(p->addr) + sizeof(p->len);
	}

	static int output_records(int outfd)
	{
	unsigned char zeroes[6] = {0, 0, 0, 0, 0, 0};
	struct ihex_binrec *p = records;

	while (p) {
	uint16_t writelen = ALIGN(ihex_binrec_size(p), 4);

	p->addr = htonl(p->addr);
	p->len = htons(p->len);
	if (write(outfd, &p->addr, writelen) != writelen)
	return 1;
	p = p->next;
	}
	/* EOF record is zero length, since we don't bother to represent
	the type field in the binary version */
	if (write(outfd, zeroes, 6) != 6)
	return 1;
	return 0;
	}