diff options
Diffstat (limited to 'package/mtd/src/imagetag.c')
-rw-r--r-- | package/mtd/src/imagetag.c | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/package/mtd/src/imagetag.c b/package/mtd/src/imagetag.c deleted file mode 100644 index a53c17a703..0000000000 --- a/package/mtd/src/imagetag.c +++ /dev/null @@ -1,316 +0,0 @@ -/* - * imagetag.c - * - * Copyright (C) 2005 Mike Baker - * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org> - * Copyrigth (C) 2010 Daniel Dickinson <openwrt@cshore.neomailbox.net> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <stddef.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/mman.h> -#include <sys/stat.h> -#include <string.h> -#include <errno.h> - -#include <sys/ioctl.h> -#include <mtd/mtd-user.h> -#include <linux/bcm963xx_tag.h> - -#include "mtd.h" -#include "crc32.h" - -ssize_t pread(int fd, void *buf, size_t count, off_t offset); -ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset); - -#define CRC_START 0xFFFFFFFF - -static uint32_t strntoul(char *str, char **endptr, int base, size_t len) { - char *newstr; - uint32_t res = 0; - - newstr = calloc(len + 1, sizeof(char)); - if (newstr) { - strncpy(newstr, str, len); - res = strtoul(newstr, endptr, base); - free(newstr); - } - return res; -} - -uint32_t compute_crc32(uint32_t crc, off_t start, size_t compute_len, int fd) -{ - uint8_t readbuf[1024]; - ssize_t res; - off_t offset = start; - - /* Read a buffer's worth of bytes */ - while (fd && (compute_len >= sizeof(readbuf))) { - res = pread(fd, readbuf, sizeof(readbuf), offset); - crc = crc32(crc, readbuf, res); - compute_len = compute_len - res; - offset += res; - } - - /* Less than buffer-size bytes remains, read compute_len bytes */ - if (fd && (compute_len > 0)) { - res = pread(fd, readbuf, compute_len, offset); - crc = crc32(crc, readbuf, res); - } - - return crc; -} - -int -trx_fixup(int fd, const char *name) -{ - struct mtd_info_user mtdInfo; - unsigned long len; - void *ptr, *scan; - int bfd; - struct bcm_tag *tag; - ssize_t res; - uint32_t cfelen, imagelen, imagestart, rootfslen; - uint32_t imagecrc, rootfscrc, headercrc; - uint32_t offset = 0; - cfelen = imagelen = imagestart = imagecrc = rootfscrc = headercrc = rootfslen = 0; - - - if (ioctl(fd, MEMGETINFO, &mtdInfo) < 0) { - fprintf(stderr, "Failed to get mtd info\n"); - goto err; - } - - len = mtdInfo.size; - if (mtdInfo.size <= 0) { - fprintf(stderr, "Invalid MTD device size\n"); - goto err; - } - - bfd = mtd_open(name, true); - ptr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, bfd, 0); - if (!ptr || (ptr == (void *) -1)) { - perror("mmap"); - goto err1; - } - - tag = (struct bcm_tag *) (ptr); - - cfelen = strntoul(&tag->cfe_length[0], NULL, 10, IMAGE_LEN); - if (cfelen) { - fprintf(stderr, "Non-zero CFE length. This is currently unsupported.\n"); - exit(1); - } - - headercrc = compute_crc32(CRC_START, offset, offsetof(struct bcm_tag, header_crc), fd); - if (headercrc != *(uint32_t *)(&tag->header_crc)) { - fprintf(stderr, "Tag verify failed. This may not be a valid image.\n"); - exit(1); - } - - sprintf(&tag->root_length[0], "%u", 0); - strncpy(&tag->total_length[0], &tag->kernel_length[0], IMAGE_LEN); - - imagestart = sizeof(tag); - memcpy(&tag->image_crc, &tag->kernel_crc, sizeof(uint32_t)); - memcpy(&tag->fskernel_crc, &tag->kernel_crc, sizeof(uint32_t)); - rootfscrc = CRC_START; - memcpy(&tag->rootfs_crc, &rootfscrc, sizeof(uint32_t)); - headercrc = crc32(CRC_START, tag, offsetof(struct bcm_tag, header_crc)); - memcpy(&tag->header_crc, &headercrc, sizeof(uint32_t)); - - msync(ptr, sizeof(struct bcm_tag), MS_SYNC|MS_INVALIDATE); - munmap(ptr, len); - close(bfd); - return 0; - -err1: - close(bfd); -err: - fprintf(stderr, "Error fixing up imagetag header\n"); - return -1; -} - - -int -trx_check(int imagefd, const char *mtd, char *buf, int *len) -{ - struct bcm_tag *tag = (const struct bcm_tag *) buf; - int fd; - uint32_t headerCRC; - uint32_t imageLen; - - if (strcmp(mtd, "linux") != 0) - return 1; - - *len = read(imagefd, buf, sizeof(struct bcm_tag)); - if (*len < sizeof(struct bcm_tag)) { - fprintf(stdout, "Could not get image header, file too small (%d bytes)\n", *len); - return 0; - } - headerCRC = crc32buf(buf, offsetof(struct bcm_tag, header_crc)); - if (*(uint32_t *)(&tag->header_crc) != headerCRC) { - - if (quiet < 2) { - fprintf(stderr, "Bad header CRC got %08x, calculated %08x\n", - *(uint32_t *)(&tag->header_crc), headerCRC); - fprintf(stderr, "This is not the correct file format; refusing to flash.\n" - "Please specify the correct file or use -f to force.\n"); - } - return 0; - } - - /* check if image fits to mtd device */ - fd = mtd_check_open(mtd); - if(fd < 0) { - fprintf(stderr, "Could not open mtd device: %s\n", mtd); - exit(1); - } - - imageLen = strntoul(&tag->total_length[0], NULL, 10, IMAGE_LEN); - - if(mtdsize < imageLen) { - fprintf(stderr, "Image too big for partition: %s\n", mtd); - close(fd); - return 0; - } - - close(fd); - return 1; -} - -int -mtd_fixtrx(const char *mtd, size_t offset) -{ - int fd; - struct bcm_tag *tag; - char *buf; - ssize_t res; - size_t block_offset; - uint32_t cfelen, imagelen, imagestart, rootfslen; - uint32_t imagecrc, rootfscrc, headercrc; - cfelen = imagelen = imagestart = imagecrc = rootfscrc = headercrc = rootfslen = 0; - - if (quiet < 2) - fprintf(stderr, "Trying to fix trx header in %s at 0x%x...\n", mtd, offset); - - block_offset = offset & ~(erasesize - 1); - offset -= block_offset; - - fd = mtd_check_open(mtd); - if(fd < 0) { - fprintf(stderr, "Could not open mtd device: %s\n", mtd); - exit(1); - } - - if (block_offset + erasesize > mtdsize) { - fprintf(stderr, "Offset too large, device size 0x%x\n", mtdsize); - exit(1); - } - - buf = malloc(erasesize); - if (!buf) { - perror("malloc"); - exit(1); - } - - res = pread(fd, buf, erasesize, block_offset); - if (res != erasesize) { - perror("pread"); - exit(1); - } - - tag = (struct bcm_tag *) (buf + offset); - - cfelen = strntoul(tag->cfe_length, NULL, 10, IMAGE_LEN); - if (cfelen) { - fprintf(stderr, "Non-zero CFE length. This is currently unsupported.\n"); - exit(1); - } - - if (quiet < 2) { - fprintf(stderr, "Verifying we actually have an imagetag.\n"); - } - - headercrc = compute_crc32(CRC_START, offset, offsetof(struct bcm_tag, header_crc), fd); - if (headercrc != *(uint32_t *)(&tag->header_crc)) { - fprintf(stderr, "Tag verify failed. This may not be a valid image.\n"); - exit(1); - } - - if (quiet < 2) { - fprintf(stderr, "Checking current fixed status.\n"); - } - - rootfslen = strntoul(&tag->root_length[0], NULL, 10, IMAGE_LEN); - if (rootfslen == 0) { - if (quiet < 2) - fprintf(stderr, "Header already fixed, exiting\n"); - close(fd); - return 0; - } - - if (quiet < 2) { - fprintf(stderr, "Setting root length to 0.\n"); - } - - sprintf(&tag->root_length[0], "%u", 0); - strncpy(&tag->total_length[0], &tag->kernel_length[0], IMAGE_LEN); - - if (quiet < 2) { - fprintf(stderr, "Recalculating CRCs.\n"); - } - - imagestart = sizeof(tag); - memcpy(&tag->image_crc, &tag->kernel_crc, sizeof(uint32_t)); - memcpy(&tag->fskernel_crc, &tag->kernel_crc, sizeof(uint32_t)); - rootfscrc = CRC_START; - memcpy(&tag->rootfs_crc, &rootfscrc, sizeof(uint32_t)); - headercrc = crc32(CRC_START, tag, offsetof(struct bcm_tag, header_crc)); - memcpy(&tag->header_crc, &headercrc, sizeof(uint32_t)); - - if (quiet < 2) { - fprintf(stderr, "Erasing imagetag block\n"); - } - - if (mtd_erase_block(fd, block_offset)) { - fprintf(stderr, "Can't erase block at 0x%x (%s)\n", block_offset, strerror(errno)); - exit(1); - } - - if (quiet < 2) { - fprintf(stderr, "New image crc32: 0x%x, rewriting block\n", - *(uint32_t *)(&tag->image_crc)); - fprintf(stderr, "New header crc32: 0x%x, rewriting block\n", headercrc); - } - - if (pwrite(fd, buf, erasesize, block_offset) != erasesize) { - fprintf(stderr, "Error writing block (%s)\n", strerror(errno)); - exit(1); - } - - if (quiet < 2) - fprintf(stderr, "Done.\n"); - - close (fd); - sync(); - return 0; - -} |