Function parse_vbios

util/intelvbttool/intelvbttool.c:880–921

* Parse Option ROM and return a valid VBT fileobject. * Caller has to make sure that it is a valid VBIOS. * Return a NULL fileobject on error. */

 * Return a NULL fileobject on error.
 */
static void parse_vbios(const struct fileobject *fo,
			struct fileobject **vbt)
{
	const optionrom_header_t *oh = (const optionrom_header_t *)fo->data;
	size_t i;

	*vbt = NULL;

	if (!oh->vbt_offset) {
		printerr("no VBT found\n");
		return;
	}

	if (oh->vbt_offset > (fo->size - sizeof(struct vbt_header))) {
		printerr("invalid VBT offset\n");
		return;
	}

	struct fileobject *fo_vbt = malloc_fo_sub(fo, oh->vbt_offset);
	if (fo_vbt) {
		parse_vbt(fo_vbt, vbt);
		free_fo(fo_vbt);
		if (*vbt)
			return;
	}
	printwarn("VBT wasn't found at specified offset of %04x\n",
		  oh->vbt_offset);

	for (i = sizeof(optionrom_header_t);
	     i <= fo->size - sizeof(struct vbt_header); i++) {
		struct fileobject *fo_vbt = malloc_fo_sub(fo, i);
		if (!fo_vbt)
			break;

		parse_vbt(fo_vbt, vbt);

		free_fo(fo_vbt);

		if (*vbt)
			return;
	}
}

/* Short VBT summary in human readable form */
static void print_vbt(const struct fileobject *fo)