| /* |
| * Copyright 2016 Google Inc. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * 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 <gbb_header.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "base/xalloc.h" |
| #include "drivers/storage/storage.h" |
| #include "vboot/board.h" |
| #include "vboot/util/gbb.h" |
| |
| const char *gbb_read_hwid(size_t *hwid_size_ptr) |
| { |
| static const char *hwid; |
| if (hwid) |
| return hwid; |
| |
| StorageOps *gbb = board_storage_gbb(); |
| |
| typedef member_typeof(GoogleBinaryBlockHeader, hwid_offset) |
| hwid_offset_t; |
| typedef member_typeof(GoogleBinaryBlockHeader, hwid_size) |
| hwid_size_t; |
| size_t hwid_offset_offset = |
| offsetof(GoogleBinaryBlockHeader, hwid_offset); |
| size_t hwid_size_offset = |
| offsetof(GoogleBinaryBlockHeader, hwid_size); |
| |
| hwid_offset_t hwid_offset; |
| if (storage_read(gbb, &hwid_offset, hwid_offset_offset, |
| sizeof(hwid_offset))) { |
| printf("Failed to read HWID offset.\n"); |
| return NULL; |
| } |
| |
| hwid_size_t hwid_size; |
| if (storage_read(gbb, &hwid_size, hwid_size_offset, |
| sizeof(hwid_size))) { |
| printf("Failed to read HWID size.\n"); |
| return NULL; |
| } |
| |
| if (hwid_size_ptr) |
| *hwid_size_ptr = hwid_size; |
| |
| hwid = xmalloc(hwid_size); |
| if (storage_read(gbb, (void *)hwid, hwid_offset, hwid_size)) { |
| printf("Failed to read HWID from the GBB.\n"); |
| free((void *)hwid); |
| return NULL; |
| } |
| |
| return hwid; |
| } |