Roll back revision 2222 to recover the wrong checking.

[mirror_edk2.git] / MdeModulePkg / Universal / Disk / Partition / Dxe / Gpt.c

/** @file\r
  Decode a hard disk partitioned with the GPT scheme in the EFI 1.0\r
  specification.\r
\r
  Copyright (c) 2006 - 2007, Intel Corporation                                              \r
  All rights reserved. This program and the accompanying materials                          \r
  are licensed and made available under the terms and conditions of the BSD License         \r
  which accompanies this distribution.  The full text of the license may be found at        \r
  http://opensource.org/licenses/bsd-license.php                                            \r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
**/\r
\r
\r
#include "Partition.h"\r
\r
\r
BOOLEAN\r
PartitionValidGptTable (\r
  IN  EFI_BLOCK_IO_PROTOCOL       *BlockIo,\r
  IN  EFI_DISK_IO_PROTOCOL        *DiskIo,\r
  IN  EFI_LBA                     Lba,\r
  OUT EFI_PARTITION_TABLE_HEADER  *PartHeader\r
  );\r
\r
\r
BOOLEAN\r
PartitionCheckGptEntryArrayCRC (\r
  IN  EFI_BLOCK_IO_PROTOCOL       *BlockIo,\r
  IN  EFI_DISK_IO_PROTOCOL        *DiskIo,\r
  IN  EFI_PARTITION_TABLE_HEADER  *PartHeader\r
  );\r
\r
\r
BOOLEAN\r
PartitionRestoreGptTable (\r
  IN  EFI_BLOCK_IO_PROTOCOL       *BlockIo,\r
  IN  EFI_DISK_IO_PROTOCOL        *DiskIo,\r
  IN  EFI_PARTITION_TABLE_HEADER  *PartHeader\r
  );\r
\r
\r
VOID\r
PartitionCheckGptEntry (\r
  IN  EFI_PARTITION_TABLE_HEADER  *PartHeader,\r
  IN  EFI_PARTITION_ENTRY         *PartEntry,\r
  OUT EFI_PARTITION_ENTRY_STATUS  *PEntryStatus\r
  );\r
\r
\r
BOOLEAN\r
PartitionCheckCrcAltSize (\r
  IN UINTN                 MaxSize,\r
  IN UINTN                 Size,\r
  IN OUT EFI_TABLE_HEADER  *Hdr\r
  );\r
\r
\r
BOOLEAN\r
PartitionCheckCrc (\r
  IN UINTN                 MaxSize,\r
  IN OUT EFI_TABLE_HEADER  *Hdr\r
  );\r
\r
\r
VOID\r
PartitionSetCrcAltSize (\r
  IN UINTN                 Size,\r
  IN OUT EFI_TABLE_HEADER  *Hdr\r
  );\r
\r
\r
VOID\r
PartitionSetCrc (\r
  IN OUT EFI_TABLE_HEADER *Hdr\r
  );\r
\r
/**\r
  Install child handles if the Handle supports GPT partition structure.\r
\r
  @param[in]  This       - Calling context.\r
  @param[in]  Handle     - Parent Handle\r
  @param[in]  DiskIo     - Parent DiskIo interface\r
  @param[in]  BlockIo    - Parent BlockIo interface\r
  @param[in]  DevicePath - Parent Device Path\r
\r
  @retval EFI_SUCCESS         Valid GPT disk\r
  @retval EFI_MEDIA_CHANGED   Media changed Detected\r
  @retval other               Not a valid GPT disk\r
\r
**/\r
EFI_STATUS\r
PartitionInstallGptChildHandles (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN  EFI_HANDLE                   Handle,\r
  IN  EFI_DISK_IO_PROTOCOL         *DiskIo,\r
  IN  EFI_BLOCK_IO_PROTOCOL        *BlockIo,\r
  IN  EFI_DEVICE_PATH_PROTOCOL     *DevicePath\r
  )\r
{\r
  EFI_STATUS                  Status;\r
  UINT32                      BlockSize;\r
  EFI_LBA                     LastBlock;\r
  MASTER_BOOT_RECORD          *ProtectiveMbr;\r
  EFI_PARTITION_TABLE_HEADER  *PrimaryHeader;\r
  EFI_PARTITION_TABLE_HEADER  *BackupHeader;\r
  EFI_PARTITION_ENTRY         *PartEntry;\r
  EFI_PARTITION_ENTRY_STATUS  *PEntryStatus;\r
  UINTN                       Index;\r
  EFI_STATUS                  GptValid;\r
  HARDDRIVE_DEVICE_PATH       HdDev;\r
\r
  ProtectiveMbr = NULL;\r
  PrimaryHeader = NULL;\r
  BackupHeader  = NULL;\r
  PartEntry     = NULL;\r
  PEntryStatus  = NULL;\r
\r
  BlockSize     = BlockIo->Media->BlockSize;\r
  LastBlock     = BlockIo->Media->LastBlock;\r
\r
  DEBUG ((EFI_D_INFO, " BlockSize : %d \n", BlockSize));\r
  DEBUG ((EFI_D_INFO, " LastBlock : %x \n", LastBlock));\r
\r
  GptValid = EFI_NOT_FOUND;\r
\r
  //\r
  // Allocate a buffer for the Protective MBR\r
  //\r
  ProtectiveMbr = AllocatePool (BlockSize);\r
  if (ProtectiveMbr == NULL) {\r
    return EFI_NOT_FOUND;\r
  }\r
\r
  //\r
  // Read the Protective MBR from LBA #0\r
  //\r
  Status = BlockIo->ReadBlocks (\r
                      BlockIo,\r
                      BlockIo->Media->MediaId,\r
                      0,\r
                      BlockIo->Media->BlockSize,\r
                      ProtectiveMbr\r
                      );\r
  if (EFI_ERROR (Status)) {\r
    GptValid = Status;\r
    goto Done;\r
  }\r
  //\r
  // Verify that the Protective MBR is valid\r
  //\r
  if (ProtectiveMbr->Partition[0].BootIndicator != 0x00 ||\r
      ProtectiveMbr->Partition[0].OSIndicator != PMBR_GPT_PARTITION ||\r
      UNPACK_UINT32 (ProtectiveMbr->Partition[0].StartingLBA) != 1\r
      ) {\r
    goto Done;\r
  }\r
\r
  //\r
  // Allocate the GPT structures\r
  //\r
  PrimaryHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r
  if (PrimaryHeader == NULL) {\r
    goto Done;\r
  }\r
\r
  BackupHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r
\r
  if (BackupHeader == NULL) {\r
    goto Done;\r
  }\r
\r
  //\r
  // Check primary and backup partition tables\r
  //\r
  if (!PartitionValidGptTable (BlockIo, DiskIo, PRIMARY_PART_HEADER_LBA, PrimaryHeader)) {\r
    DEBUG ((EFI_D_INFO, " Not Valid primary partition table\n"));\r
\r
    if (!PartitionValidGptTable (BlockIo, DiskIo, LastBlock, BackupHeader)) {\r
      DEBUG ((EFI_D_INFO, " Not Valid backup partition table\n"));\r
      goto Done;\r
    } else {\r
      DEBUG ((EFI_D_INFO, " Valid backup partition table\n"));\r
      DEBUG ((EFI_D_INFO, " Restore primary partition table by the backup\n"));\r
      if (!PartitionRestoreGptTable (BlockIo, DiskIo, BackupHeader)) {\r
        DEBUG ((EFI_D_INFO, " Restore primary partition table error\n"));\r
      }\r
\r
      if (PartitionValidGptTable (BlockIo, DiskIo, BackupHeader->AlternateLBA, PrimaryHeader)) {\r
        DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r
      }\r
    }\r
  } else if (!PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r
    DEBUG ((EFI_D_INFO, " Valid primary and !Valid backup partition table\n"));\r
    DEBUG ((EFI_D_INFO, " Restore backup partition table by the primary\n"));\r
    if (!PartitionRestoreGptTable (BlockIo, DiskIo, PrimaryHeader)) {\r
      DEBUG ((EFI_D_INFO, " Restore  backup partition table error\n"));\r
    }\r
\r
    if (PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r
      DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r
    }\r
\r
  }\r
\r
  DEBUG ((EFI_D_INFO, " Valid primary and Valid backup partition table\n"));\r
\r
  //\r
  // Read the EFI Partition Entries\r
  //\r
  PartEntry = AllocatePool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY));\r
  if (PartEntry == NULL) {\r
    DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r
    goto Done;\r
  }\r
\r
  Status = DiskIo->ReadDisk (\r
                    DiskIo,\r
                    BlockIo->Media->MediaId,\r
                    MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockSize),\r
                    PrimaryHeader->NumberOfPartitionEntries * (PrimaryHeader->SizeOfPartitionEntry),\r
                    PartEntry\r
                    );\r
  if (EFI_ERROR (Status)) {\r
    GptValid = Status;\r
    DEBUG ((EFI_D_INFO, " Partition Entry ReadBlocks error\n"));\r
    goto Done;\r
  }\r
\r
  DEBUG ((EFI_D_INFO, " Partition entries read block success\n"));\r
\r
  DEBUG ((EFI_D_INFO, " Number of partition entries: %d\n", PrimaryHeader->NumberOfPartitionEntries));\r
\r
  PEntryStatus = AllocateZeroPool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY_STATUS));\r
  if (PEntryStatus == NULL) {\r
    DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r
    goto Done;\r
  }\r
\r
  //\r
  // Check the integrity of partition entries\r
  //\r
  PartitionCheckGptEntry (PrimaryHeader, PartEntry, PEntryStatus);\r
\r
  //\r
  // If we got this far the GPT layout of the disk is valid and we should return true\r
  //\r
  GptValid = EFI_SUCCESS;\r
\r
  //\r
  // Create child device handles\r
  //\r
  for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r
    if (CompareGuid (&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeUnusedGuid) ||\r
        PEntryStatus[Index].OutOfRange ||\r
        PEntryStatus[Index].Overlap\r
        ) {\r
      //\r
      // Don't use null EFI Partition Entries or Invalid Partition Entries\r
      //\r
      continue;\r
    }\r
\r
    ZeroMem (&HdDev, sizeof (HdDev));\r
    HdDev.Header.Type     = MEDIA_DEVICE_PATH;\r
    HdDev.Header.SubType  = MEDIA_HARDDRIVE_DP;\r
    SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));\r
\r
    HdDev.PartitionNumber = (UINT32) Index + 1;\r
    HdDev.MBRType         = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;\r
    HdDev.SignatureType   = SIGNATURE_TYPE_GUID;\r
    HdDev.PartitionStart  = PartEntry[Index].StartingLBA;\r
    HdDev.PartitionSize   = PartEntry[Index].EndingLBA - PartEntry[Index].StartingLBA + 1;\r
    CopyMem (HdDev.Signature, &PartEntry[Index].UniquePartitionGUID, sizeof (EFI_GUID));\r
\r
    DEBUG ((EFI_D_INFO, " Index : %d\n", Index));\r
    DEBUG ((EFI_D_INFO, " Start LBA : %x\n", HdDev.PartitionStart));\r
    DEBUG ((EFI_D_INFO, " End LBA : %x\n", PartEntry[Index].EndingLBA));\r
    DEBUG ((EFI_D_INFO, " Partition size: %x\n", HdDev.PartitionSize));\r
    DEBUG ((EFI_D_INFO, " Start : %x", MultU64x32 (PartEntry[Index].StartingLBA, BlockSize)));\r
    DEBUG ((EFI_D_INFO, " End : %x\n", MultU64x32 (PartEntry[Index].EndingLBA, BlockSize)));\r
\r
    Status = PartitionInstallChildHandle (\r
              This,\r
              Handle,\r
              DiskIo,\r
              BlockIo,\r
              DevicePath,\r
              (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r
              PartEntry[Index].StartingLBA,\r
              PartEntry[Index].EndingLBA,\r
              BlockSize,\r
              CompareGuid(&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)\r
              );\r
  }\r
\r
  DEBUG ((EFI_D_INFO, "Prepare to Free Pool\n"));\r
\r
Done:\r
  if (ProtectiveMbr != NULL) {\r
    FreePool (ProtectiveMbr);\r
  }\r
  if (PrimaryHeader != NULL) {\r
    FreePool (PrimaryHeader);\r
  }\r
  if (BackupHeader != NULL) {\r
    FreePool (BackupHeader);\r
  }\r
  if (PartEntry != NULL) {\r
    FreePool (PartEntry);\r
  }\r
  if (PEntryStatus != NULL) {\r
    FreePool (PEntryStatus);\r
  }\r
\r
  return GptValid;\r
}\r
\r
\r
/**\r
  Install child handles if the Handle supports GPT partition structure.\r
\r
  @param[in]  BlockIo     Parent BlockIo interface\r
  @param[in]  DiskIo      Disk Io protocol.\r
  @param[in]  Lba         The starting Lba of the Partition Table\r
  @param[in]  PartHeader  Stores the partition table that is read\r
\r
  @retval TRUE      The partition table is valid\r
  @retval FALSE     The partition table is not valid\r
\r
**/\r
BOOLEAN\r
PartitionValidGptTable (\r
  IN  EFI_BLOCK_IO_PROTOCOL       *BlockIo,\r
  IN  EFI_DISK_IO_PROTOCOL        *DiskIo,\r
  IN  EFI_LBA                     Lba,\r
  OUT EFI_PARTITION_TABLE_HEADER  *PartHeader\r
  )\r
{\r
  EFI_STATUS                  Status;\r
  UINT32                      BlockSize;\r
  EFI_PARTITION_TABLE_HEADER  *PartHdr;\r
\r
  BlockSize = BlockIo->Media->BlockSize;\r
\r
  PartHdr   = AllocateZeroPool (BlockSize);\r
\r
  if (PartHdr == NULL) {\r
    DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r
    return FALSE;\r
  }\r
  //\r
  // Read the EFI Partition Table Header\r
  //\r
  Status = BlockIo->ReadBlocks (\r
                      BlockIo,\r
                      BlockIo->Media->MediaId,\r
                      Lba,\r
                      BlockSize,\r
                      PartHdr\r
                      );\r
  if (EFI_ERROR (Status)) {\r
    FreePool (PartHdr);\r
    return FALSE;\r
  }\r
\r
  if ((PartHdr->Header.Signature == EFI_PTAB_HEADER_ID) ||\r
      !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||\r
      PartHdr->MyLBA != Lba\r
      ) {\r
    DEBUG ((EFI_D_INFO, " !Valid efi partition table header\n"));\r
    FreePool (PartHdr);\r
    return FALSE;\r
  }\r
\r
  CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));\r
  if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {\r
    FreePool (PartHdr);\r
    return FALSE;\r
  }\r
\r
  DEBUG ((EFI_D_INFO, " Valid efi partition table header\n"));\r
  FreePool (PartHdr);\r
  return TRUE;\r
}\r
\r
\r
/**\r
  Check if the CRC field in the Partition table header is valid\r
  for Partition entry array.\r
\r
  @param[in]  BlockIo     Parent BlockIo interface\r
  @param[in]  DiskIo      Disk Io Protocol.\r
  @param[in]  PartHeader  Partition table header structure\r
\r
  @retval TRUE      the CRC is valid\r
  @retval FALSE     the CRC is invalid\r
\r
**/\r
BOOLEAN\r
PartitionCheckGptEntryArrayCRC (\r
  IN  EFI_BLOCK_IO_PROTOCOL       *BlockIo,\r
  IN  EFI_DISK_IO_PROTOCOL        *DiskIo,\r
  IN  EFI_PARTITION_TABLE_HEADER  *PartHeader\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINT8       *Ptr;\r
  UINT32      Crc;\r
  UINTN       Size;\r
\r
  //\r
  // Read the EFI Partition Entries\r
  //\r
  Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r
  if (Ptr == NULL) {\r
    DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r
    return FALSE;\r
  }\r
\r
  Status = DiskIo->ReadDisk (\r
                    DiskIo,\r
                    BlockIo->Media->MediaId,\r
                    MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r
                    PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r
                    Ptr\r
                    );\r
  if (EFI_ERROR (Status)) {\r
    FreePool (Ptr);\r
    return FALSE;\r
  }\r
\r
  Size    = PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry;\r
\r
  Status  = gBS->CalculateCrc32 (Ptr, Size, &Crc);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "CheckPEntryArrayCRC: Crc calculation failed\n"));\r
    FreePool (Ptr);\r
    return FALSE;\r
  }\r
\r
  FreePool (Ptr);\r
\r
  return (BOOLEAN) (PartHeader->PartitionEntryArrayCRC32 == Crc);\r
}\r
\r
\r
/**\r
  Restore Partition Table to its alternate place\r
  (Primary -> Backup or Backup -> Primary)\r
\r
  @param[in]  BlockIo     Parent BlockIo interface\r
  @param[in]  DiskIo      Disk Io Protocol.\r
  @param[in]  PartHeader  Partition table header structure\r
\r
  @retval TRUE      Restoring succeeds\r
  @retval FALSE     Restoring failed\r
\r
**/\r
BOOLEAN\r
PartitionRestoreGptTable (\r
  IN  EFI_BLOCK_IO_PROTOCOL       *BlockIo,\r
  IN  EFI_DISK_IO_PROTOCOL        *DiskIo,\r
  IN  EFI_PARTITION_TABLE_HEADER  *PartHeader\r
  )\r
{\r
  EFI_STATUS                  Status;\r
  UINTN                       BlockSize;\r
  EFI_PARTITION_TABLE_HEADER  *PartHdr;\r
  EFI_LBA                     PEntryLBA;\r
  UINT8                       *Ptr;\r
\r
  PartHdr   = NULL;\r
  Ptr       = NULL;\r
\r
  BlockSize = BlockIo->Media->BlockSize;\r
\r
  PartHdr   = AllocateZeroPool (BlockSize);\r
\r
  if (PartHdr == NULL) {\r
    DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r
    return FALSE;\r
  }\r
\r
  PEntryLBA = (PartHeader->MyLBA == PRIMARY_PART_HEADER_LBA) ? \\r
                             (PartHeader->LastUsableLBA + 1) : \\r
                             (PRIMARY_PART_HEADER_LBA + 1);\r
\r
  CopyMem (PartHdr, PartHeader, sizeof (EFI_PARTITION_TABLE_HEADER));\r
\r
  PartHdr->MyLBA              = PartHeader->AlternateLBA;\r
  PartHdr->AlternateLBA       = PartHeader->MyLBA;\r
  PartHdr->PartitionEntryLBA  = PEntryLBA;\r
  PartitionSetCrc ((EFI_TABLE_HEADER *) PartHdr);\r
\r
  Status = BlockIo->WriteBlocks (BlockIo, BlockIo->Media->MediaId, PartHdr->MyLBA, BlockSize, PartHdr);\r
  if (EFI_ERROR (Status)) {\r
    goto Done;\r
  }\r
\r
  Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r
  if (Ptr == NULL) {\r
    DEBUG ((EFI_D_ERROR, " Allocate pool effor\n"));\r
    Status = EFI_OUT_OF_RESOURCES;\r
    goto Done;\r
  }\r
\r
  Status = DiskIo->ReadDisk (\r
                    DiskIo,\r
                    BlockIo->Media->MediaId,\r
                    MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r
                    PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r
                    Ptr\r
                    );\r
  if (EFI_ERROR (Status)) {\r
    goto Done;\r
  }\r
\r
  Status = DiskIo->WriteDisk (\r
                    DiskIo,\r
                    BlockIo->Media->MediaId,\r
                    MultU64x32(PEntryLBA, BlockIo->Media->BlockSize),\r
                    PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r
                    Ptr\r
                    );\r
\r
Done:\r
  FreePool (PartHdr);\r
  FreePool (Ptr);\r
\r
  if (EFI_ERROR (Status)) {\r
    return FALSE;\r
  }\r
\r
  return TRUE;\r
}\r
\r
\r
/**\r
  Restore Partition Table to its alternate place\r
  (Primary -> Backup or Backup -> Primary)\r
\r
  @param[in]    PartHeader    Partition table header structure\r
  @param[in]    PartEntry     The partition entry array\r
  @param[out]   PEntryStatus  the partition entry status array \r
                              recording the status of each partition\r
**/\r
VOID\r
PartitionCheckGptEntry (\r
  IN  EFI_PARTITION_TABLE_HEADER  *PartHeader,\r
  IN  EFI_PARTITION_ENTRY         *PartEntry,\r
  OUT EFI_PARTITION_ENTRY_STATUS  *PEntryStatus\r
  )\r
{\r
  EFI_LBA StartingLBA;\r
  EFI_LBA EndingLBA;\r
  UINTN   Index1;\r
  UINTN   Index2;\r
\r
  DEBUG ((EFI_D_INFO, " start check partition entries\n"));\r
  for (Index1 = 0; Index1 < PartHeader->NumberOfPartitionEntries; Index1++) {\r
    if (CompareGuid (&PartEntry[Index1].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r
      continue;\r
    }\r
\r
    StartingLBA = PartEntry[Index1].StartingLBA;\r
    EndingLBA   = PartEntry[Index1].EndingLBA;\r
    if (StartingLBA > EndingLBA ||\r
        StartingLBA < PartHeader->FirstUsableLBA ||\r
        StartingLBA > PartHeader->LastUsableLBA ||\r
        EndingLBA < PartHeader->FirstUsableLBA ||\r
        EndingLBA > PartHeader->LastUsableLBA\r
        ) {\r
      PEntryStatus[Index1].OutOfRange = TRUE;\r
      continue;\r
    }\r
\r
    for (Index2 = Index1 + 1; Index2 < PartHeader->NumberOfPartitionEntries; Index2++) {\r
\r
      if (CompareGuid (&PartEntry[Index2].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r
        continue;\r
      }\r
\r
      if (PartEntry[Index2].EndingLBA >= StartingLBA && PartEntry[Index2].StartingLBA <= EndingLBA) {\r
        //\r
        // This region overlaps with the Index1'th region\r
        //\r
        PEntryStatus[Index1].Overlap  = TRUE;\r
        PEntryStatus[Index2].Overlap  = TRUE;\r
        continue;\r
\r
      }\r
    }\r
  }\r
\r
  DEBUG ((EFI_D_INFO, " End check partition entries\n"));\r
}\r
\r
\r
/**\r
  Updates the CRC32 value in the table header\r
\r
  @param[in,out]  Hdr    Table to update\r
\r
**/\r
VOID\r
PartitionSetCrc (\r
  IN OUT EFI_TABLE_HEADER *Hdr\r
  )\r
{\r
  PartitionSetCrcAltSize (Hdr->HeaderSize, Hdr);\r
}\r
\r
\r
/**\r
  Updates the CRC32 value in the table header\r
\r
  @param[in]      Size   The size of the table\r
  @param[in,out]  Hdr    Table to update\r
\r
**/\r
VOID\r
PartitionSetCrcAltSize (\r
  IN UINTN                 Size,\r
  IN OUT EFI_TABLE_HEADER  *Hdr\r
  )\r
\r
{\r
  UINT32  Crc;\r
\r
  Hdr->CRC32 = 0;\r
  gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r
  Hdr->CRC32 = Crc;\r
}\r
\r
\r
/**\r
  Checks the CRC32 value in the table header\r
\r
  @param[in]      MaxSize   Max Size limit\r
  @param[in,out]  Hdr       Table to check\r
\r
  @return TRUE    CRC Valid\r
  @return FALSE   CRC Invalid\r
\r
**/\r
BOOLEAN\r
PartitionCheckCrc (\r
  IN UINTN                 MaxSize,\r
  IN OUT EFI_TABLE_HEADER  *Hdr\r
  )\r
{\r
  return PartitionCheckCrcAltSize (MaxSize, Hdr->HeaderSize, Hdr);\r
}\r
\r
\r
/**\r
  Checks the CRC32 value in the table header\r
\r
  @param[in]      MaxSize   Max Size limit\r
  @param[in]      Size      The size of the table\r
  @param[in,out]  Hdr       Table to check\r
\r
  @return TRUE    CRC Valid\r
  @return FALSE   CRC Invalid\r
\r
**/\r
BOOLEAN\r
PartitionCheckCrcAltSize (\r
  IN UINTN                 MaxSize,\r
  IN UINTN                 Size,\r
  IN OUT EFI_TABLE_HEADER  *Hdr\r
  )\r
{\r
  UINT32      Crc;\r
  UINT32      OrgCrc;\r
  EFI_STATUS  Status;\r
\r
  Crc = 0;\r
\r
  if (Size == 0) {\r
    //\r
    // If header size is 0 CRC will pass so return FALSE here\r
    //\r
    return FALSE;\r
  }\r
\r
  if (MaxSize && Size > MaxSize) {\r
    DEBUG ((EFI_D_ERROR, "CheckCrc32: Size > MaxSize\n"));\r
    return FALSE;\r
  }\r
  //\r
  // clear old crc from header\r
  //\r
  OrgCrc      = Hdr->CRC32;\r
  Hdr->CRC32  = 0;\r
\r
  Status      = gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc calculation failed\n"));\r
    return FALSE;\r
  }\r
  //\r
  // set results\r
  //\r
  Hdr->CRC32 = Crc;\r
\r
  //\r
  // return status\r
  //\r
  DEBUG_CODE_BEGIN ();\r
    if (OrgCrc != Crc) {\r
      DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc check failed\n"));\r
    }\r
  DEBUG_CODE_END ();\r
\r
  return (BOOLEAN) (OrgCrc == Crc);\r
}\r