Fixing the bug of CGPT when primary entry table is invalid.

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 43 matching lines @@
 
 /* Defines GPT sizes */
 #define GPT_PMBR_SECTOR 1  /* size (in sectors) of PMBR */
 #define GPT_HEADER_SECTOR 1
 #define GPT_ENTRIES_SECTORS 32  /* assume sector size if 512 bytes, then
                                  *  (TOTAL_ENTRIES_SIZE / 512) = 32 */
 
 /* alias name of index in internal array for primary and secondary header and
  * entries. */
 enum {
+  /* constants for index */
   PRIMARY = 0,
   SECONDARY = 1,
+  ANY_VALID = 9999,  /* accept any between primary and secondary */
+
+  /* constants for bit mask */
   MASK_NONE = 0,
   MASK_PRIMARY = 1,
   MASK_SECONDARY = 2,
   MASK_BOTH = 3,
 };
 
 /* Verify GptData parameters are sane. */
 int CheckParameters(GptData* gpt);
 
 /* Check header fields.
@@ skipping 33 matching lines @@
 /* 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);
 
 /* Copies the current kernel partition's UniquePartitionGuid to the dest */
 void GetCurrentKernelUniqueGuid(GptData *gpt, void *dest);
 
 #endif /* VBOOT_REFERENCE_CGPTLIB_INTERNAL_H_ */