diff options
Diffstat (limited to 'bootloader.c')
| -rw-r--r-- | bootloader.c | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/bootloader.c b/bootloader.c index 61b24e918..38b5651bf 100644 --- a/bootloader.c +++ b/bootloader.c @@ -119,252 +119,3 @@ int set_bootloader_message(const struct bootloader_message *in) { LOGI("Set boot command \"%s\"\n", in->command[0] != 255 ? in->command : ""); return 0; } - -/* Update Image - * - * - will be stored in the "cache" partition - * - bad blocks will be ignored, like boot.img and recovery.img - * - the first block will be the image header (described below) - * - the size is in BYTES, inclusive of the header - * - offsets are in BYTES from the start of the update header - * - two raw bitmaps will be included, the "busy" and "fail" bitmaps - * - for dream, the bitmaps will be 320x480x16bpp RGB565 - */ - -#define UPDATE_MAGIC "MSM-RADIO-UPDATE" -#define UPDATE_MAGIC_SIZE 16 -#define UPDATE_VERSION 0x00010000 - -struct update_header { - unsigned char MAGIC[UPDATE_MAGIC_SIZE]; - - unsigned version; - unsigned size; - - unsigned image_offset; - unsigned image_length; - - unsigned bitmap_width; - unsigned bitmap_height; - unsigned bitmap_bpp; - - unsigned busy_bitmap_offset; - unsigned busy_bitmap_length; - - unsigned fail_bitmap_offset; - unsigned fail_bitmap_length; -}; - -#define LOG_MAGIC "LOGmagic" -#define LOG_MAGIC_SIZE 8 - -int write_update_for_bootloader( - const char *update, int update_length, - int bitmap_width, int bitmap_height, int bitmap_bpp, - const char *busy_bitmap, const char *fail_bitmap, - const char *log_filename) { - if (ensure_root_path_unmounted(CACHE_NAME)) { - LOGE("Can't unmount %s\n", CACHE_NAME); - return -1; - } - - const MtdPartition *part = get_root_mtd_partition(CACHE_NAME); - if (part == NULL) { - LOGE("Can't find %s\n", CACHE_NAME); - return -1; - } - - MtdWriteContext *write = mtd_write_partition(part); - if (write == NULL) { - LOGE("Can't open %s\n(%s)\n", CACHE_NAME, strerror(errno)); - return -1; - } - - /* Write an invalid (zero) header first, to disable any previous - * update and any other structured contents (like a filesystem), - * and as a placeholder for the amount of space required. - */ - - struct update_header header; - memset(&header, 0, sizeof(header)); - const ssize_t header_size = sizeof(header); - if (mtd_write_data(write, (char*) &header, header_size) != header_size) { - LOGE("Can't write header to %s\n(%s)\n", CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - - /* Write each section individually block-aligned, so we can write - * each block independently without complicated buffering. - */ - - memcpy(&header.MAGIC, UPDATE_MAGIC, UPDATE_MAGIC_SIZE); - header.version = UPDATE_VERSION; - header.size = header_size; - - if (log_filename != NULL) { - // Write 1 byte into the following block, then fill to the end - // in order to reserve that block. We'll use the block to - // send a copy of the log through to the next invocation of - // recovery. We write the log as late as possible in order to - // capture any messages emitted by this function. - mtd_erase_blocks(write, 0); - if (mtd_write_data(write, (char*) &header, 1) != 1) { - LOGE("Can't write log block to %s\n(%s)\n", - CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - } - - off_t image_start_pos = mtd_erase_blocks(write, 0); - header.image_length = update_length; - if ((int) header.image_offset == -1 || - mtd_write_data(write, update, update_length) != update_length) { - LOGE("Can't write update to %s\n(%s)\n", CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - off_t busy_start_pos = mtd_erase_blocks(write, 0); - header.image_offset = mtd_find_write_start(write, image_start_pos); - - header.bitmap_width = bitmap_width; - header.bitmap_height = bitmap_height; - header.bitmap_bpp = bitmap_bpp; - - int bitmap_length = (bitmap_bpp + 7) / 8 * bitmap_width * bitmap_height; - - header.busy_bitmap_length = busy_bitmap != NULL ? bitmap_length : 0; - if ((int) header.busy_bitmap_offset == -1 || - mtd_write_data(write, busy_bitmap, bitmap_length) != bitmap_length) { - LOGE("Can't write bitmap to %s\n(%s)\n", CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - off_t fail_start_pos = mtd_erase_blocks(write, 0); - header.busy_bitmap_offset = mtd_find_write_start(write, busy_start_pos); - - header.fail_bitmap_length = fail_bitmap != NULL ? bitmap_length : 0; - if ((int) header.fail_bitmap_offset == -1 || - mtd_write_data(write, fail_bitmap, bitmap_length) != bitmap_length) { - LOGE("Can't write bitmap to %s\n(%s)\n", CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - mtd_erase_blocks(write, 0); - header.fail_bitmap_offset = mtd_find_write_start(write, fail_start_pos); - - /* Write the header last, after all the blocks it refers to, so that - * when the magic number is installed everything is valid. - */ - - if (mtd_write_close(write)) { - LOGE("Can't finish writing %s\n(%s)\n", CACHE_NAME, strerror(errno)); - return -1; - } - - write = mtd_write_partition(part); - if (write == NULL) { - LOGE("Can't reopen %s\n(%s)\n", CACHE_NAME, strerror(errno)); - return -1; - } - - if (mtd_write_data(write, (char*) &header, header_size) != header_size) { - LOGE("Can't rewrite header to %s\n(%s)\n", CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - - if (log_filename != NULL) { - size_t erase_size; - if (mtd_partition_info(part, NULL, &erase_size, NULL) != 0) { - LOGE("Error reading block size\n(%s)\n", strerror(errno)); - mtd_write_close(write); - return -1; - } - mtd_erase_blocks(write, 0); - - if (erase_size > 0) { - char* log = malloc(erase_size); - FILE* f = fopen(log_filename, "rb"); - // The fseek() may fail if it tries to go before the - // beginning of the log, but that's okay because we want - // to be positioned at the start anyway. - fseek(f, -(erase_size-sizeof(size_t)-LOG_MAGIC_SIZE), SEEK_END); - memcpy(log, LOG_MAGIC, LOG_MAGIC_SIZE); - size_t read = fread(log+sizeof(size_t)+LOG_MAGIC_SIZE, - 1, erase_size-sizeof(size_t)-LOG_MAGIC_SIZE, f); - LOGI("read %d bytes from log\n", (int)read); - *(size_t *)(log + LOG_MAGIC_SIZE) = read; - fclose(f); - if (mtd_write_data(write, log, erase_size) != erase_size) { - LOGE("failed to store log in cache partition\n(%s)\n", - strerror(errno)); - mtd_write_close(write); - } - free(log); - } - } - - if (mtd_erase_blocks(write, 0) != image_start_pos) { - LOGE("Misalignment rewriting %s\n(%s)\n", CACHE_NAME, strerror(errno)); - mtd_write_close(write); - return -1; - } - - if (mtd_write_close(write)) { - LOGE("Can't finish header of %s\n(%s)\n", CACHE_NAME, strerror(errno)); - return -1; - } - - return 0; -} - -void recover_firmware_update_log() { - printf("recovering log from before firmware update\n"); - - const MtdPartition *part = get_root_mtd_partition(CACHE_NAME); - if (part == NULL) { - LOGE("Can't find %s\n", CACHE_NAME); - return; - } - - MtdReadContext* read = mtd_read_partition(part); - - size_t erase_size; - if (mtd_partition_info(part, NULL, &erase_size, NULL) != 0) { - LOGE("Error reading block size\n(%s)\n", strerror(errno)); - mtd_read_close(read); - return; - } - - char* buffer = malloc(erase_size); - if (mtd_read_data(read, buffer, erase_size) != erase_size) { - LOGE("Error reading header block\n(%s)\n", strerror(errno)); - mtd_read_close(read); - free(buffer); - return; - } - if (mtd_read_data(read, buffer, erase_size) != erase_size) { - LOGE("Error reading log block\n(%s)\n", strerror(errno)); - mtd_read_close(read); - free(buffer); - return; - } - mtd_read_close(read); - - if (memcmp(buffer, LOG_MAGIC, LOG_MAGIC_SIZE) != 0) { - LOGE("No log from before firmware install\n"); - free(buffer); - return; - } - - size_t log_size = *(size_t *)(buffer + LOG_MAGIC_SIZE); - LOGI("header has %d bytes of log\n", (int)log_size); - - printf("\n###\n### START RECOVERED LOG\n###\n\n"); - fwrite(buffer + sizeof(size_t) + LOG_MAGIC_SIZE, 1, log_size, stdout); - printf("\n\n###\n### END RECOVERED LOG\n###\n\n"); - - free(buffer); -} |