Modify the size of the attributes field to comply with msc limitations.

firmware/lib/cgptlib/include/cgptlib_internal.h

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_
 #define VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_
 
 #include "sysincludes.h"
 #include "cgptlib.h"
@@ skipping 10 matching lines @@
  *  63-61  -- (reserved)
  *     60  -- read-only
  *  59-57  -- (reserved)
  *     56  -- success
  *  55-52  -- tries
  *  51-48  -- priority
  *   47-2  -- UEFI: reserved for future use
  *      1  -- UEFI: partition is not mapped
  *      0  -- UEFI: partition is required
  */
-#define CGPT_ATTRIBUTE_SUCCESSFUL_OFFSET 56
+#define CGPT_ATTRIBUTE_SUCCESSFUL_OFFSET (56 - 48)
 #define CGPT_ATTRIBUTE_MAX_SUCCESSFUL (1ULL)
 #define CGPT_ATTRIBUTE_SUCCESSFUL_MASK (CGPT_ATTRIBUTE_MAX_SUCCESSFUL << \
                                      CGPT_ATTRIBUTE_SUCCESSFUL_OFFSET)
 
-#define CGPT_ATTRIBUTE_TRIES_OFFSET 52
+#define CGPT_ATTRIBUTE_TRIES_OFFSET (52 - 48)
 #define CGPT_ATTRIBUTE_MAX_TRIES (15ULL)
 #define CGPT_ATTRIBUTE_TRIES_MASK (CGPT_ATTRIBUTE_MAX_TRIES << \
                                    CGPT_ATTRIBUTE_TRIES_OFFSET)
 
-#define CGPT_ATTRIBUTE_PRIORITY_OFFSET 48
+#define CGPT_ATTRIBUTE_PRIORITY_OFFSET (48 - 48)
 #define CGPT_ATTRIBUTE_MAX_PRIORITY (15ULL)
 #define CGPT_ATTRIBUTE_PRIORITY_MASK (CGPT_ATTRIBUTE_MAX_PRIORITY << \
                                       CGPT_ATTRIBUTE_PRIORITY_OFFSET)
 
 /* Defines ChromeOS-specific limitation on GPT */
 #define MIN_SIZE_OF_HEADER 92
 #define MAX_SIZE_OF_HEADER 512
 #define MIN_SIZE_OF_ENTRY 128
 #define MAX_SIZE_OF_ENTRY 512
 #define SIZE_OF_ENTRY_MULTIPLE 8
@@ skipping 54 matching lines @@
 void SetEntryPriority(GptEntry* e, int priority);
 void SetEntryTries(GptEntry* e, int tries);
 
 /* Return 1 if the entry is unused, 0 if it is used. */
 int IsUnusedEntry(const GptEntry* e);
 
 /* Returns 1 if the entry is a Chrome OS kernel partition, else 0. */
 int IsKernelEntry(const GptEntry* e);
 
 #endif /* VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_ */