OpenWrt – Rev 2
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2008 Axel Gembe <ago@bastart.eu.org>
* Copyright (C) 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <inttypes.h>
#include "bcm_tag.h"
#include "imagetag_cmdline.h"
#include "cyg_crc.h"
#define DEADCODE 0xDEADC0DE
/* Kernel header */
struct kernelhdr {
uint32_t loadaddr; /* Kernel load address */
uint32_t entry; /* Kernel entry point address */
uint32_t lzmalen; /* Compressed length of the LZMA data that follows */
};
static char pirellitab[NUM_PIRELLI][BOARDID_LEN] = PIRELLI_BOARDS;
void int2tag(char *tag, uint32_t value) {
uint32_t network = htonl(value);
memcpy(tag, (char *)(&network), 4);
}
uint32_t compute_crc32(uint32_t crc, FILE *binfile, size_t compute_start, size_t compute_len)
{
uint8_t readbuf[1024];
size_t read;
fseek(binfile, compute_start, SEEK_SET);
/* read block of 1024 bytes */
while (binfile && !feof(binfile) && !ferror(binfile) && (compute_len >= sizeof(readbuf))) {
read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), binfile);
crc = cyg_crc32_accumulate(crc, readbuf, read);
compute_len = compute_len - read;
}
/* Less than 1024 bytes remains, read compute_len bytes */
if (binfile && !feof(binfile) && !ferror(binfile) && (compute_len > 0)) {
read = fread(readbuf, sizeof(uint8_t), compute_len, binfile);
crc = cyg_crc32_accumulate(crc, readbuf, read);
}
return crc;
}
size_t getlen(FILE *fp)
{
size_t retval, curpos;
if (!fp)
return 0;
curpos = ftell(fp);
fseek(fp, 0, SEEK_END);
retval = ftell(fp);
fseek(fp, curpos, SEEK_SET);
return retval;
}
int tagfile(const char *kernel, const char *rootfs, const char *bin, \
const struct gengetopt_args_info *args, \
uint32_t flash_start, uint32_t image_offset, \
uint32_t block_size, uint32_t load_address, uint32_t entry)
{
struct bcm_tag tag;
struct kernelhdr khdr;
FILE *kernelfile = NULL, *rootfsfile = NULL, *binfile = NULL, *cfefile = NULL;
size_t cfeoff, cfelen, kerneloff, kernellen, rootfsoff, rootfslen, \
read, imagelen, rootfsoffpadlen = 0, kernelfslen, kerneloffpadlen = 0, oldrootfslen, \
rootfsend;
uint8_t readbuf[1024];
uint32_t imagecrc = IMAGETAG_CRC_START;
uint32_t kernelcrc = IMAGETAG_CRC_START;
uint32_t rootfscrc = IMAGETAG_CRC_START;
uint32_t kernelfscrc = IMAGETAG_CRC_START;
uint32_t fwaddr = 0;
uint8_t crc_val;
const uint32_t deadcode = htonl(DEADCODE);
int i;
int is_pirelli = 0;
memset(&tag, 0, sizeof(struct bcm_tag));
if (!kernel || !rootfs) {
fprintf(stderr, "imagetag can't create an image without both kernel and rootfs\n");
}
if (kernel && !(kernelfile = fopen(kernel, "rb"))) {
fprintf(stderr, "Unable to open kernel \"%s\"\n", kernel);
return 1;
}
if (rootfs && !(rootfsfile = fopen(rootfs, "rb"))) {
fprintf(stderr, "Unable to open rootfs \"%s\"\n", rootfs);
return 1;
}
if (!bin || !(binfile = fopen(bin, "wb+"))) {
fprintf(stderr, "Unable to open output file \"%s\"\n", bin);
return 1;
}
if ((args->cfe_given) && (args->cfe_arg)) {
if (!(cfefile = fopen(args->cfe_arg, "rb"))) {
fprintf(stderr, "Unable to open CFE file \"%s\"\n", args->cfe_arg);
}
}
fwaddr = flash_start + image_offset;
if (cfefile) {
cfeoff = flash_start;
cfelen = getlen(cfefile);
/* Seek to the start of the file after tag */
fseek(binfile, sizeof(tag), SEEK_SET);
/* Write the cfe */
while (cfefile && !feof(cfefile) && !ferror(cfefile)) {
read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), cfefile);
fwrite(readbuf, sizeof(uint8_t), read, binfile);
}
} else {
cfeoff = 0;
cfelen = 0;
}
if (!args->root_first_flag) {
/* Build the kernel address and length (doesn't need to be aligned, read only) */
kerneloff = fwaddr + sizeof(tag);
kernellen = getlen(kernelfile);
if (!args->kernel_file_has_header_flag) {
/* Build the kernel header */
khdr.loadaddr = htonl(load_address);
khdr.entry = htonl(entry);
khdr.lzmalen = htonl(kernellen);
/* Increase the kernel size by the header size */
kernellen += sizeof(khdr);
}
/* Build the rootfs address and length */
rootfsoff = kerneloff + kernellen;
/* align the start if requested */
if (args->align_rootfs_flag)
rootfsoff = (rootfsoff % block_size) > 0 ? (((rootfsoff / block_size) + 1) * block_size) : rootfsoff;
else
rootfsoff = (rootfsoff % 4) > 0 ? (((rootfsoff / 4) + 1) * 4) : rootfsoff;
/* align the end */
rootfsend = rootfsoff + getlen(rootfsfile);
if ((rootfsend % block_size) > 0)
rootfsend = (((rootfsend / block_size) + 1) * block_size);
rootfslen = rootfsend - rootfsoff;
imagelen = rootfsoff + rootfslen - kerneloff + sizeof(deadcode);
rootfsoffpadlen = rootfsoff - (kerneloff + kernellen);
/* Seek to the start of the kernel */
fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
/* Write the kernel header */
fwrite(&khdr, sizeof(khdr), 1, binfile);
/* Write the kernel */
while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
fwrite(readbuf, sizeof(uint8_t), read, binfile);
}
/* Write the RootFS */
fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
fwrite(readbuf, sizeof(uint8_t), read, binfile);
}
/* Align image to specified erase block size and append deadc0de */
printf("Data alignment to %dk with 'deadc0de' appended\n", block_size/1024);
fseek(binfile, rootfsoff + rootfslen - fwaddr + cfelen, SEEK_SET);
fwrite(&deadcode, sizeof(uint32_t), 1, binfile);
oldrootfslen = rootfslen;
if (args->pad_given) {
uint32_t allfs = 0xffffffff;
uint32_t pad_size = args->pad_arg * 1024 * 1024;
printf("Padding image to %d bytes ...\n", pad_size);
while (imagelen < pad_size) {
fwrite(&allfs, sizeof(uint32_t), 1, binfile);
imagelen += 4;
rootfslen += 4;
}
}
/* Flush the binfile buffer so that when we read from file, it contains
* everything in the buffer
*/
fflush(binfile);
/* Compute the crc32 of the entire image (deadC0de included) */
imagecrc = compute_crc32(imagecrc, binfile, kerneloff - fwaddr + cfelen, imagelen);
/* Compute the crc32 of the kernel and padding between kernel and rootfs) */
kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
/* Compute the crc32 of the kernel and padding between kernel and rootfs) */
kernelfscrc = compute_crc32(kernelfscrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen + rootfslen + sizeof(deadcode));
/* Compute the crc32 of the flashImageStart to rootLength.
* The broadcom firmware assumes the rootfs starts the image,
* therefore uses the rootfs start to determine where to flash
* the image. Since we have the kernel first we have to give
* it the kernel address, but the crc uses the length
* associated with this address, which is added to the kernel
* length to determine the length of image to flash and thus
* needs to be rootfs + deadcode
*/
rootfscrc = compute_crc32(rootfscrc, binfile, kerneloff - fwaddr + cfelen, rootfslen + sizeof(deadcode));
} else {
/* Build the kernel address and length (doesn't need to be aligned, read only) */
rootfsoff = fwaddr + sizeof(tag);
oldrootfslen = getlen(rootfsfile);
rootfslen = oldrootfslen;
rootfslen = ( (rootfslen % block_size) > 0 ? (((rootfslen / block_size) + 1) * block_size) : rootfslen );
kerneloffpadlen = rootfslen - oldrootfslen;
oldrootfslen = rootfslen;
kerneloff = rootfsoff + rootfslen;
kernellen = getlen(kernelfile);
imagelen = cfelen + rootfslen + kernellen;
/* Seek to the start of the kernel */
fseek(binfile, kerneloff - fwaddr + cfelen, SEEK_SET);
if (!args->kernel_file_has_header_flag) {
/* Build the kernel header */
khdr.loadaddr = htonl(load_address);
khdr.entry = htonl(entry);
khdr.lzmalen = htonl(kernellen);
/* Write the kernel header */
fwrite(&khdr, sizeof(khdr), 1, binfile);
/* Increase the kernel size by the header size */
kernellen += sizeof(khdr);
}
/* Write the kernel */
while (kernelfile && !feof(kernelfile) && !ferror(kernelfile)) {
read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), kernelfile);
fwrite(readbuf, sizeof(uint8_t), read, binfile);
}
/* Write the RootFS */
fseek(binfile, rootfsoff - fwaddr + cfelen, SEEK_SET);
while (rootfsfile && !feof(rootfsfile) && !ferror(rootfsfile)) {
read = fread(readbuf, sizeof(uint8_t), sizeof(readbuf), rootfsfile);
fwrite(readbuf, sizeof(uint8_t), read, binfile);
}
/* Flush the binfile buffer so that when we read from file, it contains
* everything in the buffer
*/
fflush(binfile);
/* Compute the crc32 of the entire image (deadC0de included) */
imagecrc = compute_crc32(imagecrc, binfile, sizeof(tag), imagelen);
/* Compute the crc32 of the kernel and padding between kernel and rootfs) */
kernelcrc = compute_crc32(kernelcrc, binfile, kerneloff - fwaddr + cfelen, kernellen + rootfsoffpadlen);
kernelfscrc = compute_crc32(kernelfscrc, binfile, rootfsoff - fwaddr + cfelen, kernellen + rootfslen);
rootfscrc = compute_crc32(rootfscrc, binfile, rootfsoff - fwaddr + cfelen, rootfslen);
}
/* Close the files */
if (cfefile) {
fclose(cfefile);
}
fclose(kernelfile);
fclose(rootfsfile);
/* Build the tag */
strncpy(tag.tagVersion, args->tag_version_arg, sizeof(tag.tagVersion) - 1);
strncpy(tag.sig_1, args->signature_arg, sizeof(tag.sig_1) - 1);
strncpy(tag.sig_2, args->signature2_arg, sizeof(tag.sig_2) - 1);
strncpy(tag.chipid, args->chipid_arg, sizeof(tag.chipid) - 1);
strncpy(tag.boardid, args->boardid_arg, sizeof(tag.boardid) - 1);
strcpy(tag.big_endian, "1");
sprintf(tag.totalLength, "%lu", imagelen);
if (args->cfe_given) {
sprintf(tag.cfeAddress, "%" PRIu32, flash_start);
sprintf(tag.cfeLength, "%lu", cfelen);
} else {
/* We don't include CFE */
strcpy(tag.cfeAddress, "0");
strcpy(tag.cfeLength, "0");
}
sprintf(tag.kernelAddress, "%lu", kerneloff);
sprintf(tag.kernelLength, "%lu", kernellen + rootfsoffpadlen);
if (args->root_first_flag) {
sprintf(tag.flashImageStart, "%lu", rootfsoff);
sprintf(tag.flashRootLength, "%lu", rootfslen);
} else {
sprintf(tag.flashImageStart, "%lu", kerneloff);
sprintf(tag.flashRootLength, "%lu", rootfslen + sizeof(deadcode));
}
int2tag(tag.rootLength, oldrootfslen + sizeof(deadcode));
if (args->rsa_signature_given) {
strncpy(tag.rsa_signature, args->rsa_signature_arg, RSASIG_LEN);
}
if (args->layoutver_given) {
strncpy(tag.flashLayoutVer, args->layoutver_arg, TAGLAYOUT_LEN);
}
if (args->info1_given) {
strncpy(tag.information1, args->info1_arg, TAGINFO1_LEN);
}
if (args->info2_given) {
strncpy(tag.information2, args->info2_arg, TAGINFO2_LEN);
}
if (args->reserved2_given) {
strncpy(tag.reserved2, args->reserved2_arg, 16);
}
if (args->altinfo_given) {
strncpy(tag.information1, args->altinfo_arg, TAGINFO1_LEN);
}
if (args->second_image_flag_given) {
if (strncmp(args->second_image_flag_arg, "2", DUALFLAG_LEN) != 0) {
strncpy(tag.dualImage, args->second_image_flag_arg, DUALFLAG_LEN);
}
}
if (args->inactive_given) {
if (strncmp(args->inactive_arg, "2", INACTIVEFLAG_LEN) != 0) {
strncpy(tag.inactiveFlag, args->second_image_flag_arg, INACTIVEFLAG_LEN);
}
}
for (i = 0; i < NUM_PIRELLI; i++) {
if (strncmp(args->boardid_arg, pirellitab[i], BOARDID_LEN) == 0) {
is_pirelli = 1;
break;
}
}
if ( !is_pirelli ) {
int2tag(tag.imageCRC, kernelfscrc);
} else {
int2tag(tag.imageCRC, kernelcrc);
}
int2tag(&(tag.rootfsCRC[0]), rootfscrc);
int2tag(tag.kernelCRC, kernelcrc);
int2tag(tag.fskernelCRC, kernelfscrc);
int2tag(tag.headerCRC, cyg_crc32_accumulate(IMAGETAG_CRC_START, (uint8_t*)&tag, sizeof(tag) - 20));
fseek(binfile, 0L, SEEK_SET);
fwrite(&tag, sizeof(uint8_t), sizeof(tag), binfile);
fflush(binfile);
fclose(binfile);
return 0;
}
int main(int argc, char **argv)
{
int c, i;
char *kernel, *rootfs, *bin;
uint32_t flash_start, image_offset, block_size, load_address, entry;
flash_start = image_offset = block_size = load_address = entry = 0;
struct gengetopt_args_info parsed_args;
kernel = rootfs = bin = NULL;
if (imagetag_cmdline(argc, argv, &parsed_args)) {
exit(1);
}
printf("Broadcom 63xx image tagger - v2.0.0\n");
printf("Copyright (C) 2008 Axel Gembe\n");
printf("Copyright (C) 2009-2010 Daniel Dickinson\n");
printf("Licensed under the terms of the Gnu General Public License\n");
kernel = parsed_args.kernel_arg;
rootfs = parsed_args.rootfs_arg;
bin = parsed_args.output_arg;
if (strlen(parsed_args.tag_version_arg) >= TAGVER_LEN) {
fprintf(stderr, "Error: Tag Version (tag_version,v) too long.\n");
exit(1);
}
if (strlen(parsed_args.boardid_arg) >= BOARDID_LEN) {
fprintf(stderr, "Error: Board ID (boardid,b) too long.\n");
exit(1);
}
if (strlen(parsed_args.chipid_arg) >= CHIPID_LEN) {
fprintf(stderr, "Error: Chip ID (chipid,c) too long.\n");
exit(1);
}
if (strlen(parsed_args.signature_arg) >= SIG1_LEN) {
fprintf(stderr, "Error: Magic string (signature,a) too long.\n");
exit(1);
}
if (strlen(parsed_args.signature2_arg) >= SIG2_LEN) {
fprintf(stderr, "Error: Second magic string (signature2,m) too long.\n");
exit(1);
}
if (parsed_args.layoutver_given) {
if (strlen(parsed_args.layoutver_arg) > FLASHLAYOUTVER_LEN) {
fprintf(stderr, "Error: Flash layout version (layoutver,y) too long.\n");
exit(1);
}
}
if (parsed_args.rsa_signature_given) {
if (strlen(parsed_args.rsa_signature_arg) > RSASIG_LEN) {
fprintf(stderr, "Error: RSA Signature (rsa_signature,r) too long.\n");
exit(1);
}
}
if (parsed_args.info1_given) {
if (strlen(parsed_args.info1_arg) >= TAGINFO1_LEN) {
fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
exit(1);
}
}
if (parsed_args.info2_given) {
if (strlen(parsed_args.info2_arg) >= TAGINFO2_LEN) {
fprintf(stderr, "Error: Vendor Information 2 (info2) too long.\n");
exit(1);
}
}
if (parsed_args.altinfo_given) {
if (strlen(parsed_args.altinfo_arg) >= ALTTAGINFO_LEN) {
fprintf(stderr, "Error: Vendor Information 1 (info1) too long.\n");
exit(1);
}
}
if (parsed_args.pad_given) {
if (parsed_args.pad_arg < 0) {
fprintf(stderr, "Error: pad size must be positive.\r");
exit(1);
}
}
flash_start = strtoul(parsed_args.flash_start_arg, NULL, 16);
image_offset = strtoul(parsed_args.image_offset_arg, NULL, 16);
block_size = strtoul(parsed_args.block_size_arg, NULL, 16);
if (!parsed_args.kernel_file_has_header_flag) {
load_address = strtoul(parsed_args.load_addr_arg, NULL, 16);
entry = strtoul(parsed_args.entry_arg, NULL, 16);
if (load_address == 0) {
fprintf(stderr, "Error: Invalid value for load address\n");
}
if (entry == 0) {
fprintf(stderr, "Error: Invalid value for entry\n");
}
}
return tagfile(kernel, rootfs, bin, &parsed_args, flash_start, image_offset, block_size, load_address, entry);
}