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author | Felix Fietkau <nbd@openwrt.org> | 2006-02-12 06:00:38 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2006-02-12 06:00:38 +0000 |
commit | 3d9ed4425c9ee015f1384dfb5c4288ce5a15025d (patch) | |
tree | d604d47ed0783b1cb44ec9a1efb3c5cfb88fc203 /target/utils/src/dgfirmware.c | |
parent | 09634919d3524e15cce41331fe2504031bb19a9c (diff) | |
download | upstream-3d9ed4425c9ee015f1384dfb5c4288ce5a15025d.tar.gz upstream-3d9ed4425c9ee015f1384dfb5c4288ce5a15025d.tar.bz2 upstream-3d9ed4425c9ee015f1384dfb5c4288ce5a15025d.zip |
add support for netgear dg834 and the almost identical sphairon jdr454wb: new images, automatic boot loader patcher, updated flash script (dlink.pl renamed to adam2flash.pl) - Thanks to Jonathan McDowell (Noodles)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3221 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/utils/src/dgfirmware.c')
-rw-r--r-- | target/utils/src/dgfirmware.c | 376 |
1 files changed, 376 insertions, 0 deletions
diff --git a/target/utils/src/dgfirmware.c b/target/utils/src/dgfirmware.c new file mode 100644 index 0000000000..5ff3b69646 --- /dev/null +++ b/target/utils/src/dgfirmware.c @@ -0,0 +1,376 @@ +#include <stdlib.h> +#include <stdio.h> + + +#define IMG_SIZE 0x3e0000 + +#define KERNEL_START 0x020000 +#define KERNEL_SIZE 0x0b0000 + +#define ROOTFS_START 0x0d0000 +#define ROOTFS_SIZE 0x30ffb2 + +char* app_name; + + + + +void print_usage(void) +{ + fprintf(stderr, "usage: dgfirmware [<opts>] <img>\n"); + fprintf(stderr, " <img> firmware image filename\n"); + fprintf(stderr, " <opts> -h print this message\n"); + fprintf(stderr, " -f fix the checksum\n"); + fprintf(stderr, " -x <file> extract the rootfs file to <file>\n"); + fprintf(stderr, " -xk <file> extract the kernel to <file>\n"); + fprintf(stderr, " -m <file> merge in rootfs fil\e from <file>\n"); + fprintf(stderr, " -k <file> merge in kernel from <file>\n"); + fprintf(stderr, " -w <file> write back the modified firmware\n"); +} + + +unsigned char* read_img(const char *fname) +{ + FILE *fp; + int size; + unsigned char *img; + + fp = fopen(fname, "rb"); + if (fp == NULL) { + perror(app_name); + exit(-1); + } + + fseek(fp, 0, SEEK_END); + size = ftell(fp); + + if (size != IMG_SIZE) { + fprintf(stderr, "%s: image file has wrong size\n", app_name); + fclose(fp); + exit(-1); + } + + rewind(fp); + + img = malloc(IMG_SIZE); + if (img == NULL) { + perror(app_name); + fclose(fp); + exit(-1); + } + + if (fread(img, 1, IMG_SIZE, fp) != IMG_SIZE) { + fprintf(stderr, "%s: can't read image file\n", app_name); + fclose(fp); + exit(-1); + } + + fclose(fp); + return img; +} + + +void write_img(unsigned char* img, const char *fname) +{ + FILE *fp; + + fp = fopen(fname, "wb"); + if (fp == NULL) { + perror(app_name); + exit(-1); + } + + if (fwrite(img, 1, IMG_SIZE, fp) != IMG_SIZE) { + fprintf(stderr, "%s: can't write image file\n", app_name); + fclose(fp); + exit(-1); + } +} + + +void write_rootfs(unsigned char* img, const char *fname) +{ + FILE *fp; + + fp = fopen(fname, "wb"); + if (fp == NULL) { + perror(app_name); + exit(-1); + } + + if (fwrite(img+ROOTFS_START, 1, ROOTFS_SIZE, fp) != ROOTFS_SIZE) { + fprintf(stderr, "%s: can't write image file\n", app_name); + fclose(fp); + exit(-1); + } +} + + +void write_kernel(unsigned char* img, const char *fname) +{ + FILE *fp; + + fp = fopen(fname, "wb"); + if (fp == NULL) { + perror(app_name); + exit(-1); + } + + if (fwrite(img+KERNEL_START, 1, KERNEL_SIZE, fp) != KERNEL_SIZE) { + fprintf(stderr, "%s: can't write kernel file\n", app_name); + fclose(fp); + exit(-1); + } +} + + +unsigned char* read_rootfs(unsigned char* img, const char *fname) +{ + FILE *fp; + int size; + int i; + + for (i=ROOTFS_START; i<ROOTFS_START+ROOTFS_SIZE; i++) + img[i] = 0xff; + + fp = fopen(fname, "rb"); + if (fp == NULL) { + perror(app_name); + exit(-1); + } + + fseek(fp, 0, SEEK_END); + size = ftell(fp); + + if (size > ROOTFS_SIZE) { + fprintf(stderr, "%s: rootfs image file is too big\n", app_name); + fclose(fp); + exit(-1); + } + + rewind(fp); + + if (fread(img+ROOTFS_START, 1, size, fp) != size) { + fprintf(stderr, "%s: can't read rootfs image file\n", app_name); + fclose(fp); + exit(-1); + } + + fclose(fp); + return img; +} + + +unsigned char* read_kernel(unsigned char* img, const char *fname) +{ + FILE *fp; + int size; + int i; + + for (i=KERNEL_START; i<KERNEL_START+KERNEL_SIZE; i++) + img[i] = 0xff; + + fp = fopen(fname, "rb"); + if (fp == NULL) { + perror(app_name); + exit(-1); + } + + fseek(fp, 0, SEEK_END); + size = ftell(fp); + + if (size > KERNEL_SIZE) { + fprintf(stderr, "%s: kernel binary file is too big\n", app_name); + fclose(fp); + exit(-1); + } + + rewind(fp); + + if (fread(img+KERNEL_START, 1, size, fp) != size) { + fprintf(stderr, "%s: can't read kernel file\n", app_name); + fclose(fp); + exit(-1); + } + + fclose(fp); + return img; +} + + +int get_checksum(unsigned char* img) +{ + short unsigned s; + + s = img[0x3dfffc] + (img[0x3dfffd]<<8); + + return s; +} + + +void set_checksum(unsigned char*img, unsigned short sum) +{ + img[0x3dfffc] = sum & 0xff; + img[0x3dfffd] = (sum>>8) & 0xff; +} + + +int compute_checksum(unsigned char* img) +{ + int i; + short s=0; + + for (i=0; i<0x3dfffc; i++) + s += img[i]; + + return s; +} + + +int main(int argc, char* argv[]) +{ + char *img_fname = NULL; + char *rootfs_fname = NULL; + char *kernel_fname = NULL; + char *new_img_fname = NULL; + + int do_fix_checksum = 0; + int do_write = 0; + int do_write_rootfs = 0; + int do_read_rootfs = 0; + int do_write_kernel = 0; + int do_read_kernel = 0; + + int i; + unsigned char *img; + unsigned short img_checksum; + unsigned short real_checksum; + + app_name = argv[0]; + + for (i=1; i<argc; i++) { + if (!strcmp(argv[i], "-h")) { + print_usage(); + return 0; + } + else if (!strcmp(argv[i], "-f")) { + do_fix_checksum = 1; + } + else if (!strcmp(argv[i], "-x")) { + if (i+1 >= argc) { + fprintf(stderr, "%s: missing argument\n", app_name); + return -1; + } + do_write_rootfs = 1; + rootfs_fname = argv[i+1]; + i++; + } + else if (!strcmp(argv[i], "-xk")) { + if (i+1 >= argc) { + fprintf(stderr, "%s: missing argument\n", app_name); + return -1; + } + do_write_kernel = 1; + kernel_fname = argv[i+1]; + i++; + } + else if (!strcmp(argv[i], "-m")) { + if (i+1 >= argc) { + fprintf(stderr, "%s: missing argument\n", app_name); + return -1; + } + do_read_rootfs = 1; + rootfs_fname = argv[i+1]; + i++; + } + else if (!strcmp(argv[i], "-k")) { + if (i+1 >= argc) { + fprintf(stderr, "%s: missing argument\n", app_name); + return -1; + } + do_read_kernel = 1; + kernel_fname = argv[i+1]; + i++; + } + else if (!strcmp(argv[i], "-w")) { + if (i+1 >= argc) { + fprintf(stderr, "%s: missing argument\n", app_name); + return -1; + } + do_write = 1; + new_img_fname = argv[i+1]; + i++; + } + else if (img_fname != 0) { + fprintf(stderr, "%s: too many arguments\n", app_name); + return -1; + } + else { + img_fname = argv[i]; + } + } + + if (img_fname == NULL) { + fprintf(stderr, "%s: missing argument\n", app_name); + return -1; + } + + if ((do_read_rootfs && do_write_rootfs) || + (do_read_kernel && do_write_kernel)) { + fprintf(stderr, "%s: conflictuous options\n", app_name); + return -1; + } + + printf ("** Read firmware file\n"); + img = read_img(img_fname); + + printf ("Firmware product: %s\n", img+0x3dffbd); + printf ("Firmware version: 1.%02d.%02d\n", (img[0x3dffeb] & 0x7f), img[0x3dffec]); + + if (do_write_rootfs) { + printf ("** Write rootfs file\n"); + write_rootfs(img, rootfs_fname); + } + + if (do_write_kernel) { + printf ("** Write kernel file\n"); + write_kernel(img, kernel_fname); + } + + if (do_read_rootfs) { + printf ("** Read rootfs file\n"); + read_rootfs(img, rootfs_fname); + do_fix_checksum = 1; + } + + if (do_read_kernel) { + printf ("** Read kernel file\n"); + read_kernel(img, kernel_fname); + do_fix_checksum = 1; + } + + img_checksum = get_checksum(img); + real_checksum = compute_checksum(img); + + printf ("image checksum = %04x\n", img_checksum); + printf ("real checksum = %04x\n", real_checksum); + + if (do_fix_checksum) { + if (img_checksum != real_checksum) { + printf ("** Bad Checksum, fix it\n"); + set_checksum(img, real_checksum); + } + else { + printf ("** Checksum is correct, good\n"); + } + } + + if (do_write) { + printf ("** Write image file\n"); + write_img(img, new_img_fname); + } + + free(img); + return 0; +} + |