Function cbfs_add_master_header

util/cbfstool/cbfstool.c:780–868

}

static int cbfs_add_master_header(void)
{
	const char * const name = "cbfs master header";
	struct cbfs_image image;
	struct cbfs_file *header = NULL;
	struct buffer buffer;
	int ret = 1;
	size_t offset;
	size_t size;
	void *h_loc;

	if (cbfs_image_from_buffer(&image, param.image_region,
		param.headeroffset)) {
		ERROR("Selected image region is not a CBFS.\n");
		return 1;
	}

	if (cbfs_get_entry(&image, name)) {
		ERROR("'%s' already in ROM image.\n", name);
		return 1;
	}

	if (buffer_create(&buffer, sizeof(struct cbfs_header), name) != 0)
		return 1;

	struct cbfs_header *h = (struct cbfs_header *)buffer.data;
	h->magic = htobe32(CBFS_HEADER_MAGIC);
	h->version = htobe32(CBFS_HEADER_VERSION);
	/* The 4 bytes are left out for two reasons:
	 * 1. the cbfs master header pointer resides there
	 * 2. some cbfs implementations assume that an image that resides
	 *    below 4GB has a bootblock and get confused when the end of the
	 *    image is at 4GB == 0.
	 */
	h->bootblocksize = htobe32(4);
	h->align = htobe32(CBFS_ALIGNMENT);
	/* The offset and romsize fields within the master header are absolute
	 * values within the boot media. As such, romsize needs to relfect
	 * the end 'offset' for a CBFS. To achieve that the current buffer
	 * representing the CBFS region's size is added to the offset of
	 * the region within a larger image.
	 */
	offset = buffer_get(param.image_region) -
		buffer_get_original_backing(param.image_region);
	size = buffer_size(param.image_region);
	h->romsize = htobe32(size + offset);
	h->offset = htobe32(offset);
	h->architecture = htobe32(CBFS_ARCHITECTURE_UNKNOWN);

	/* Never add a hash attribute to the master header. */
	header = cbfs_create_file_header(CBFS_TYPE_CBFSHEADER,
		buffer_size(&buffer), name);
	if (!header)
		goto done;
	if (cbfs_add_entry(&image, &buffer, 0, header, 0) != 0) {
		ERROR("Failed to add cbfs master header into ROM image.\n");
		goto done;
	}