/*
* JCG Firmware image header
*/
-#define JH_MAGIC 0x59535a4a /* "YSZJ" */
+#define JH_MAGIC 0x59535a4a /* "YSZJ" */
struct jcg_header {
- uint32_t jh_magic;
- uint8_t jh_version[32]; /* Firmware version string. Fill with
- zeros to avoid encryption */
- uint32_t jh_type; /* must be 1 */
- uint8_t jh_info[64]; /* Firmware info string. Fill with
- zeros to avoid encryption */
- uint32_t jh_time; /* Image creation time in seconds since
- * the Epoch. Does not seem to be used
- * by the stock firmware. */
- uint16_t jh_major; /* Major fimware version */
- uint16_t jh_minor; /* Minor fimrmware version */
- uint8_t jh_unknown[392]; /* Apparently unused and all zeros */
- uint32_t jh_dcrc; /* CRC checksum of the payload */
- uint32_t jh_hcrc; /* CRC checksum of the header */
+ uint32_t jh_magic;
+ uint8_t jh_version[32]; /* Firmware version string.
+ Fill with zeros to avoid encryption */
+ uint32_t jh_type; /* must be 1 */
+ uint8_t jh_info[64]; /* Firmware info string. Fill with
+ zeros to avoid encryption */
+ uint32_t jh_time; /* Image creation time in seconds since
+ * the Epoch. Does not seem to be used
+ * by the stock firmware. */
+ uint16_t jh_major; /* Major fimware version */
+ uint16_t jh_minor; /* Minor fimrmware version */
+ uint8_t jh_unknown[392]; /* Apparently unused and all zeros */
+ uint32_t jh_dcrc; /* CRC checksum of the payload */
+ uint32_t jh_hcrc; /* CRC checksum of the header */
};
/*
#define IH_NMLEN 28 /* Image Name Length */
struct uimage_header {
- uint32_t ih_magic; /* Image Header Magic Number */
- uint32_t ih_hcrc; /* Image Header CRC Checksum */
- uint32_t ih_time; /* Image Creation Timestamp */
- uint32_t ih_size; /* Image Data Size */
- uint32_t ih_load; /* Data Load Address */
- uint32_t ih_ep; /* Entry Point Address */
- uint32_t ih_dcrc; /* Image Data CRC Checksum */
- uint8_t ih_os; /* Operating System */
- uint8_t ih_arch; /* CPU architecture */
- uint8_t ih_type; /* Image Type */
- uint8_t ih_comp; /* Compression Type */
- uint8_t ih_name[IH_NMLEN];/* Image Name */
- uint32_t ih_fsoff; /* Offset of the file system partition */
+ uint32_t ih_magic; /* Image Header Magic Number */
+ uint32_t ih_hcrc; /* Image Header CRC Checksum */
+ uint32_t ih_time; /* Image Creation Timestamp */
+ uint32_t ih_size; /* Image Data Size */
+ uint32_t ih_load; /* Data Load Address */
+ uint32_t ih_ep; /* Entry Point Address */
+ uint32_t ih_dcrc; /* Image Data CRC Checksum */
+ uint8_t ih_os; /* Operating System */
+ uint8_t ih_arch; /* CPU architecture */
+ uint8_t ih_type; /* Image Type */
+ uint8_t ih_comp; /* Compression Type */
+ uint8_t ih_name[IH_NMLEN];/* Image Name */
+ uint32_t ih_fsoff; /* Offset of the file system
+ partition from the start of
+ the header */
};
/*
int
opensize(char *name, size_t *size)
{
- struct stat s;
- int fd = open(name, O_RDONLY);
- if (fd < 0) {
- err(1, "cannot open \"%s\"", name);
- }
- if (fstat(fd, &s) == -1) {
- err(1, "cannot stat \"%s\"", name);
- }
- *size = s.st_size;
- return fd;
+ struct stat s;
+ int fd = open(name, O_RDONLY);
+ if (fd < 0) {
+ err(1, "cannot open \"%s\"", name);
+ }
+ if (fstat(fd, &s) == -1) {
+ err(1, "cannot stat \"%s\"", name);
+ }
+ *size = s.st_size;
+ return fd;
}
/*
void
mkjcgheader(struct jcg_header *h, size_t psize, char *version)
{
- uLong crc;
- uint16_t major = 0, minor = 0;
- void *payload = (void *)h + sizeof(*h);
+ uLong crc;
+ uint16_t major = 0, minor = 0;
+ void *payload = (void *)h + sizeof(*h);
- if (version != NULL) {
- if (sscanf(version, "%hu.%hu", &major, &minor) != 2) {
- err(1, "cannot parse version \"%s\"", version);
+ if (version != NULL) {
+ if (sscanf(version, "%hu.%hu", &major, &minor) != 2) {
+ err(1, "cannot parse version \"%s\"", version);
+ }
}
- }
- memset(h, 0, sizeof(*h));
- h->jh_magic = htonl(JH_MAGIC);
- h->jh_type = htonl(1);
- h->jh_time = htonl(time(NULL));
- h->jh_major = htons(major);
- h->jh_minor = htons(minor);
+ memset(h, 0, sizeof(*h));
+ h->jh_magic = htonl(JH_MAGIC);
+ h->jh_type = htonl(1);
+ h->jh_time = htonl(time(NULL));
+ h->jh_major = htons(major);
+ h->jh_minor = htons(minor);
- /* CRC over JCG payload (uImage) */
- crc = crc32(0L, Z_NULL, 0);
- crc = crc32(crc, payload, psize);
- h->jh_dcrc = htonl(crc);
+ /* CRC over JCG payload (uImage) */
+ crc = crc32(0L, Z_NULL, 0);
+ crc = crc32(crc, payload, psize);
+ h->jh_dcrc = htonl(crc);
- /* CRC over JCG header */
- crc = crc32(0L, Z_NULL, 0);
- crc = crc32(crc, (void *)h, sizeof(*h));
- h->jh_hcrc = htonl(crc);
+ /* CRC over JCG header */
+ crc = crc32(0L, Z_NULL, 0);
+ crc = crc32(crc, (void *)h, sizeof(*h));
+ h->jh_hcrc = htonl(crc);
}
/*
void
mkuheader(struct uimage_header *h, size_t ksize, size_t fsize)
{
- uLong crc;
- void *payload = (void *)h + sizeof(*h);
+ uLong crc;
+ void *payload = (void *)h + sizeof(*h);
- // printf("mkuheader: %p, %zd, %zd\n", h, ksize, fsize);
- memset(h, 0, sizeof(*h));
- h->ih_magic = htonl(IH_MAGIC);
- h->ih_time = htonl(time(NULL));
- h->ih_size = htonl(ksize + fsize);
- h->ih_load = htonl(0x80000000);
- h->ih_ep = htonl(0x80292000);
- h->ih_os = 0x05;
- h->ih_arch = 0x05;
- h->ih_type = 0x02;
- h->ih_comp = 0x03;
- h->ih_fsoff = htonl(sizeof(*h) + ksize);
- strcpy((char *)h->ih_name, "Linux Kernel Image");
+ // printf("mkuheader: %p, %zd, %zd\n", h, ksize, fsize);
+ memset(h, 0, sizeof(*h));
+ h->ih_magic = htonl(IH_MAGIC);
+ h->ih_time = htonl(time(NULL));
+ h->ih_size = htonl(ksize + fsize);
+ h->ih_load = htonl(0x80000000);
+ h->ih_ep = htonl(0x80292000);
+ h->ih_os = 0x05;
+ h->ih_arch = 0x05;
+ h->ih_type = 0x02;
+ h->ih_comp = 0x03;
+ h->ih_fsoff = htonl(sizeof(*h) + ksize);
+ strcpy((char *)h->ih_name, "Linux Kernel Image");
- /* CRC over uImage payload (kernel and file system) */
- crc = crc32(0L, Z_NULL, 0);
- crc = crc32(crc, payload, ntohl(h->ih_size));
- h->ih_dcrc = htonl(crc);
- printf("CRC1: %08lx\n", crc);
+ /* CRC over uImage payload (kernel and file system) */
+ crc = crc32(0L, Z_NULL, 0);
+ crc = crc32(crc, payload, ntohl(h->ih_size));
+ h->ih_dcrc = htonl(crc);
+ printf("CRC1: %08lx\n", crc);
- /* CRC over uImage header */
- crc = crc32(0L, Z_NULL, 0);
- crc = crc32(crc, (void *)h, sizeof(*h));
- h->ih_hcrc = htonl(crc);
- printf("CRC2: %08lx\n", crc);
+ /* CRC over uImage header */
+ crc = crc32(0L, Z_NULL, 0);
+ crc = crc32(crc, (void *)h, sizeof(*h));
+ h->ih_hcrc = htonl(crc);
+ printf("CRC2: %08lx\n", crc);
}
/*
void
craftcrc(uint32_t dcrc, uint8_t *buf, size_t len)
{
- int i;
- uint32_t a;
- uint32_t patch = 0;
- uint32_t crc = crc32(0L, Z_NULL, 0);
+ int i;
+ uint32_t a;
+ uint32_t patch = 0;
+ uint32_t crc = crc32(0L, Z_NULL, 0);
- a = ~dcrc;
- for (i = 0; i < 32; i++) {
- if (patch & 1) {
- patch = (patch >> 1) ^ 0xedb88320L;
- } else {
- patch >>= 1;
+ a = ~dcrc;
+ for (i = 0; i < 32; i++) {
+ if (patch & 1) {
+ patch = (patch >> 1) ^ 0xedb88320L;
+ } else {
+ patch >>= 1;
+ }
+ if (a & 1) {
+ patch ^= 0x5b358fd3L;
+ }
+ a >>= 1;
}
- if (a & 1) {
- patch ^= 0x5b358fd3L;
+ patch ^= ~crc32(crc, buf, len - 4);
+ for (i = 0; i < 4; i++) {
+ buf[len - 4 + i] = patch & 0xff;
+ patch >>= 8;
+ }
+ /* Verify that we actually get the desired result */
+ crc = crc32(0L, Z_NULL, 0);
+ crc = crc32(crc, buf, len);
+ if (crc != dcrc) {
+ errx(1, "CRC patching is broken: wanted %08x, but got %08x.",
+ dcrc, crc);
}
- a >>= 1;
- }
- patch ^= ~crc32(crc, buf, len - 4);
- for (i = 0; i < 4; i++) {
- buf[len - 4 + i] = patch & 0xff;
- patch >>= 8;
- }
- /* Verify that we actually get the desired result */
- crc = crc32(0L, Z_NULL, 0);
- crc = crc32(crc, buf, len);
- if (crc != dcrc) {
- errx(1, "CRC patching is broken: wanted %08x, but got %08x.", dcrc, crc);
- }
}
void
usage() {
- fprintf(stderr, "Usage:\n"
- " jcgimage -o outputfile -u uImage [-v version]\n"
- " jcgimage -o outputfile -k kernel -f rootfs [-v version]\n");
- exit(1);
+ fprintf(stderr, "Usage:\n"
+ "jcgimage -o outfile -u uImage [-v version]\n"
+ "jcgimage -o outfile -k kernel -f rootfs [-v version]\n");
+ exit(1);
}
#define MODE_UNKNOWN 0
int
main(int argc, char **argv)
{
- struct jcg_header *jh;
- struct uimage_header *uh;
- int c;
- char *imagefile = NULL;
- char *file1 = NULL;
- char *file2 = NULL;
- char *version = NULL;
- int mode = MODE_UNKNOWN;
- int fdo, fd1, fd2;
- size_t size1, size2, sizeu, sizeo, off1, off2;
- void *map;
+ struct jcg_header *jh;
+ struct uimage_header *uh;
+ int c;
+ char *imagefile = NULL;
+ char *file1 = NULL;
+ char *file2 = NULL;
+ char *version = NULL;
+ int mode = MODE_UNKNOWN;
+ int fdo, fd1, fd2;
+ size_t size1, size2, sizeu, sizeo, off1, off2;
+ void *map;
- /* Make sure the headers have the right size */
- assert(sizeof(struct jcg_header) == 512);
- assert(sizeof(struct uimage_header) == 64);
+ /* Make sure the headers have the right size */
+ assert(sizeof(struct jcg_header) == 512);
+ assert(sizeof(struct uimage_header) == 64);
- while ((c = getopt(argc, argv, "o:k:f:u:v:h")) != -1) {
- switch (c) {
- case 'o':
- imagefile = optarg;
- break;
- case 'k':
- if (mode == MODE_UIMAGE)
- errx(1,"-k cannot be combined with -u");
- mode = MODE_KR;
- file1 = optarg;
- break;
- case 'f':
- if (mode == MODE_UIMAGE)
- errx(1,"-f cannot be combined with -u");
- mode = MODE_KR;
- file2 = optarg;
- break;
- case 'u':
- if (mode == MODE_KR)
- errx(1,"-u cannot be combined with -k and -r");
- mode = MODE_UIMAGE;
- file1 = optarg;
- break;
- case 'v':
- version = optarg;
- break;
- case 'h':
- default:
- usage();
+ while ((c = getopt(argc, argv, "o:k:f:u:v:h")) != -1) {
+ switch (c) {
+ case 'o':
+ imagefile = optarg;
+ break;
+ case 'k':
+ if (mode == MODE_UIMAGE) {
+ errx(1,"-k cannot be combined with -u");
+ }
+ mode = MODE_KR;
+ file1 = optarg;
+ break;
+ case 'f':
+ if (mode == MODE_UIMAGE) {
+ errx(1,"-f cannot be combined with -u");
+ }
+ mode = MODE_KR;
+ file2 = optarg;
+ break;
+ case 'u':
+ if (mode == MODE_KR) {
+ errx(1,"-u cannot be combined with -k and -r");
+ }
+ mode = MODE_UIMAGE;
+ file1 = optarg;
+ break;
+ case 'v':
+ version = optarg;
+ break;
+ case 'h':
+ default:
+ usage();
+ }
+ }
+ if (optind != argc) {
+ errx(1, "illegal arg \"%s\"", argv[optind]);
+ }
+ if (imagefile == NULL) {
+ errx(1, "no output file specified");
+ }
+ if (mode == MODE_UNKNOWN) {
+ errx(1, "specify either -u or -k and -r");
+ }
+ if (mode == MODE_KR) {
+ if (file1 == NULL || file2 == NULL) {
+ errx(1,"need -k and -r");
+ }
+ fd2 = opensize(file2, &size2);
+ }
+ fd1 = opensize(file1, &size1);
+ if (mode == MODE_UIMAGE) {
+ off1 = sizeof(*jh);
+ sizeu = size1 + 4;
+ sizeo = sizeof(*jh) + sizeu;
+ } else {
+ off1 = sizeof(*jh) + sizeof(*uh);
+ off2 = sizeof(*jh) + sizeof(*uh) + size1;
+ sizeu = sizeof(*uh) + size1 + size2;
+ sizeo = sizeof(*jh) + sizeu;
}
- }
- if (optind != argc) {
- errx(1, "illegal arg \"%s\"", argv[optind]);
- }
- if (imagefile == NULL) {
- errx(1, "no output file specified");
- }
- if (mode == MODE_UNKNOWN)
- errx(1, "specify either -u or -k and -r");
- if (mode == MODE_KR) {
- if (file1 == NULL || file2 == NULL)
- errx(1,"need -k and -r");
- fd2 = opensize(file2, &size2);
- }
- fd1 = opensize(file1, &size1);
- if (mode == MODE_UIMAGE) {
- off1 = sizeof(*jh);
- sizeu = size1 + 4;
- sizeo = sizeof(*jh) + sizeu;
- } else {
- off1 = sizeof(*jh) + sizeof(*uh);
- off2 = sizeof(*jh) + sizeof(*uh) + size1;
- sizeu = sizeof(*uh) + size1 + size2;
- sizeo = sizeof(*jh) + sizeu;
- }
- if (sizeo > MAXSIZE)
- errx(1,"payload too large: %zd > %zd\n", sizeo, MAXSIZE);
+ if (sizeo > MAXSIZE) {
+ errx(1,"payload too large: %zd > %zd\n", sizeo, MAXSIZE);
+ }
- fdo = open(imagefile, O_RDWR | O_CREAT | O_TRUNC, 00644);
- if (fdo < 0)
- err(1, "cannot open \"%s\"", imagefile);
+ fdo = open(imagefile, O_RDWR | O_CREAT | O_TRUNC, 00644);
+ if (fdo < 0) {
+ err(1, "cannot open \"%s\"", imagefile);
+ }
- if (ftruncate(fdo, sizeo) == -1) {
- err(1, "cannot grow \"%s\" to %zd bytes", imagefile, sizeo);
- }
- map = mmap(NULL, sizeo, PROT_READ|PROT_WRITE, MAP_SHARED, fdo, 0);
- uh = map + sizeof(*jh);
- if (map == MAP_FAILED) {
- err(1, "cannot mmap \"%s\"", imagefile);
- }
+ if (ftruncate(fdo, sizeo) == -1) {
+ err(1, "cannot grow \"%s\" to %zd bytes", imagefile, sizeo);
+ }
+ map = mmap(NULL, sizeo, PROT_READ|PROT_WRITE, MAP_SHARED, fdo, 0);
+ uh = map + sizeof(*jh);
+ if (map == MAP_FAILED) {
+ err(1, "cannot mmap \"%s\"", imagefile);
+ }
- if (read(fd1, map + off1, size1) != size1)
- err(1, "cannot copy %s", file1);
+ if (read(fd1, map + off1, size1) != size1) {
+ err(1, "cannot copy %s", file1);
+ }
- if (mode == MODE_KR) {
- if (read(fd2, map+off2, size2) != size2)
- err(1, "cannot copy %s", file2);
- mkuheader(uh, size1, size2);
- } else if (mode == MODE_UIMAGE) {
- craftcrc(ntohl(uh->ih_dcrc), (void*)uh + sizeof(*uh),
- sizeu - sizeof(*uh));
- }
- mkjcgheader(map, sizeu, version);
- munmap(map, sizeo);
- close(fdo);
- return 0;
+ if (mode == MODE_KR) {
+ if (read(fd2, map+off2, size2) != size2) {
+ err(1, "cannot copy %s", file2);
+ }
+ mkuheader(uh, size1, size2);
+ } else if (mode == MODE_UIMAGE) {
+ craftcrc(ntohl(uh->ih_dcrc), (void*)uh + sizeof(*uh),
+ sizeu - sizeof(*uh));
+ }
+ mkjcgheader(map, sizeu, version);
+ munmap(map, sizeo);
+ close(fdo);
+ return 0;
}
-
projects / openwrt.git / blobdiff