X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=UnixPkg%2FSec%2FFwVol.c;fp=UnixPkg%2FSec%2FFwVol.c;h=0000000000000000000000000000000000000000;hb=5d71a30480bdf7081f72485d6bf48361c244c4d7;hp=6723148bdc8f4e28ab90a09045f372b41d3bf4f5;hpb=bf6ee6c7c33cf280cdfb2fd0e6b66a712b7aa4a1;p=mirror_edk2.git diff --git a/UnixPkg/Sec/FwVol.c b/UnixPkg/Sec/FwVol.c deleted file mode 100644 index 6723148bdc..0000000000 --- a/UnixPkg/Sec/FwVol.c +++ /dev/null @@ -1,314 +0,0 @@ -/*++ - -Copyright (c) 2006, Intel Corporation. All rights reserved.
-This program and the accompanying materials -are licensed and made available under the terms and conditions of the BSD License -which accompanies this distribution. The full text of the license may be found at -http://opensource.org/licenses/bsd-license.php - -THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, -WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. - -Module Name: - FwVol.c - -Abstract: - A simple FV stack so the SEC can extract the SEC Core from an - FV. - ---*/ - -#include "SecMain.h" - -#define GET_OCCUPIED_SIZE(ActualSize, Alignment) \ - (ActualSize) + (((Alignment) - ((ActualSize) & ((Alignment) - 1))) & ((Alignment) - 1)) - -EFI_FFS_FILE_STATE -GetFileState ( - IN UINT8 ErasePolarity, - IN EFI_FFS_FILE_HEADER *FfsHeader - ) -/*++ - -Routine Description: - Returns the highest bit set of the State field - -Arguments: - ErasePolarity - Erase Polarity as defined by EFI_FVB2_ERASE_POLARITY - in the Attributes field. - FfsHeader - Pointer to FFS File Header. - -Returns: - Returns the highest bit in the State field - ---*/ -{ - EFI_FFS_FILE_STATE FileState; - EFI_FFS_FILE_STATE HighestBit; - - FileState = FfsHeader->State; - - if (ErasePolarity != 0) { - FileState = (EFI_FFS_FILE_STATE)~FileState; - } - - HighestBit = 0x80; - while (HighestBit != 0 && (HighestBit & FileState) == 0) { - HighestBit >>= 1; - } - - return HighestBit; -} - -UINT8 -CalculateHeaderChecksum ( - IN EFI_FFS_FILE_HEADER *FileHeader - ) -/*++ - -Routine Description: - Calculates the checksum of the header of a file. - -Arguments: - FileHeader - Pointer to FFS File Header. - -Returns: - Checksum of the header. - ---*/ -{ - UINT8 *ptr; - UINTN Index; - UINT8 Sum; - - Sum = 0; - ptr = (UINT8 *) FileHeader; - - for (Index = 0; Index < sizeof (EFI_FFS_FILE_HEADER) - 3; Index += 4) { - Sum = (UINT8) (Sum + ptr[Index]); - Sum = (UINT8) (Sum + ptr[Index + 1]); - Sum = (UINT8) (Sum + ptr[Index + 2]); - Sum = (UINT8) (Sum + ptr[Index + 3]); - } - - for (; Index < sizeof (EFI_FFS_FILE_HEADER); Index++) { - Sum = (UINT8) (Sum + ptr[Index]); - } - // - // State field (since this indicates the different state of file). - // - Sum = (UINT8) (Sum - FileHeader->State); - // - // Checksum field of the file is not part of the header checksum. - // - Sum = (UINT8) (Sum - FileHeader->IntegrityCheck.Checksum.File); - - return Sum; -} - -EFI_STATUS -SecFfsFindNextFile ( - IN EFI_FV_FILETYPE SearchType, - IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader, - IN OUT EFI_FFS_FILE_HEADER **FileHeader - ) -/*++ - -Routine Description: - Given the input file pointer, search for the next matching file in the - FFS volume as defined by SearchType. The search starts from FileHeader inside - the Firmware Volume defined by FwVolHeader. - -Arguments: - SearchType - Filter to find only files of this type. - Type EFI_FV_FILETYPE_ALL causes no filtering to be done. - FwVolHeader - Pointer to the FV header of the volume to search. - This parameter must point to a valid FFS volume. - FileHeader - Pointer to the current file from which to begin searching. - This pointer will be updated upon return to reflect the file - found. - -Returns: - EFI_NOT_FOUND - No files matching the search criteria were found - EFI_SUCCESS - ---*/ -{ - EFI_FFS_FILE_HEADER *FfsFileHeader; - UINT32 FileLength; - UINT32 FileOccupiedSize; - UINT32 FileOffset; - UINT64 FvLength; - UINT8 ErasePolarity; - UINT8 FileState; - - FvLength = FwVolHeader->FvLength; - if (FwVolHeader->Attributes & EFI_FVB2_ERASE_POLARITY) { - ErasePolarity = 1; - } else { - ErasePolarity = 0; - } - // - // If FileHeader is not specified (NULL) start with the first file in the - // firmware volume. Otherwise, start from the FileHeader. - // - if (*FileHeader == NULL) { - FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FwVolHeader + FwVolHeader->HeaderLength); - } else { - // - // Length is 24 bits wide so mask upper 8 bits - // FileLength is adjusted to FileOccupiedSize as it is 8 byte aligned. - // - FileLength = *(UINT32 *) (*FileHeader)->Size & 0x00FFFFFF; - FileOccupiedSize = GET_OCCUPIED_SIZE (FileLength, 8); - FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) *FileHeader + FileOccupiedSize); - } - - FileOffset = (UINT32) ((UINT8 *) FfsFileHeader - (UINT8 *) FwVolHeader); - - while (FileOffset < (FvLength - sizeof (EFI_FFS_FILE_HEADER))) { - // - // Get FileState which is the highest bit of the State - // - FileState = GetFileState (ErasePolarity, FfsFileHeader); - - switch (FileState) { - - case EFI_FILE_HEADER_INVALID: - FileOffset += sizeof (EFI_FFS_FILE_HEADER); - FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsFileHeader + sizeof (EFI_FFS_FILE_HEADER)); - break; - - case EFI_FILE_DATA_VALID: - case EFI_FILE_MARKED_FOR_UPDATE: - if (CalculateHeaderChecksum (FfsFileHeader) == 0) { - FileLength = *(UINT32 *) (FfsFileHeader->Size) & 0x00FFFFFF; - FileOccupiedSize = GET_OCCUPIED_SIZE (FileLength, 8); - - if ((SearchType == FfsFileHeader->Type) || (SearchType == EFI_FV_FILETYPE_ALL)) { - - *FileHeader = FfsFileHeader; - - return EFI_SUCCESS; - } - - FileOffset += FileOccupiedSize; - FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsFileHeader + FileOccupiedSize); - } else { - return EFI_NOT_FOUND; - } - break; - - case EFI_FILE_DELETED: - FileLength = *(UINT32 *) (FfsFileHeader->Size) & 0x00FFFFFF; - FileOccupiedSize = GET_OCCUPIED_SIZE (FileLength, 8); - FileOffset += FileOccupiedSize; - FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsFileHeader + FileOccupiedSize); - break; - - default: - return EFI_NOT_FOUND; - - } - } - - return EFI_NOT_FOUND; -} - -EFI_STATUS -SecFfsFindSectionData ( - IN EFI_SECTION_TYPE SectionType, - IN EFI_FFS_FILE_HEADER *FfsFileHeader, - IN OUT VOID **SectionData - ) -/*++ - -Routine Description: - Given the input file pointer, search for the next matching section in the - FFS volume. - -Arguments: - SearchType - Filter to find only sections of this type. - FfsFileHeader - Pointer to the current file to search. - SectionData - Pointer to the Section matching SectionType in FfsFileHeader. - NULL if section not found - -Returns: - EFI_NOT_FOUND - No files matching the search criteria were found - EFI_SUCCESS - ---*/ -{ - UINT32 FileSize; - EFI_COMMON_SECTION_HEADER *Section; - UINT32 SectionLength; - UINT32 ParsedLength; - - // - // Size is 24 bits wide so mask upper 8 bits. - // Does not include FfsFileHeader header size - // FileSize is adjusted to FileOccupiedSize as it is 8 byte aligned. - // - Section = (EFI_COMMON_SECTION_HEADER *) (FfsFileHeader + 1); - FileSize = *(UINT32 *) (FfsFileHeader->Size) & 0x00FFFFFF; - FileSize -= sizeof (EFI_FFS_FILE_HEADER); - - *SectionData = NULL; - ParsedLength = 0; - while (ParsedLength < FileSize) { - if (Section->Type == SectionType) { - *SectionData = (VOID *) (Section + 1); - return EFI_SUCCESS; - } - // - // Size is 24 bits wide so mask upper 8 bits. - // SectionLength is adjusted it is 4 byte aligned. - // Go to the next section - // - SectionLength = *(UINT32 *) Section->Size & 0x00FFFFFF; - SectionLength = GET_OCCUPIED_SIZE (SectionLength, 4); - - ParsedLength += SectionLength; - Section = (EFI_COMMON_SECTION_HEADER *) ((UINT8 *) Section + SectionLength); - } - - return EFI_NOT_FOUND; -} - -EFI_STATUS -SecFfsFindPeiCore ( - IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader, - OUT VOID **Pe32Data - ) -/*++ - -Routine Description: - Given the pointer to the Firmware Volume Header find the SEC - core and return it's PE32 image. - -Arguments: - FwVolHeader - Pointer to memory mapped FV - Pe32Data - Pointer to SEC PE32 iamge. - -Returns: - EFI_SUCCESS - Pe32Data is valid - other - Failure - ---*/ -{ - EFI_STATUS Status; - EFI_FFS_FILE_HEADER *FileHeader; - EFI_FV_FILETYPE SearchType; - - SearchType = EFI_FV_FILETYPE_PEI_CORE; - FileHeader = NULL; - do { - Status = SecFfsFindNextFile (SearchType, FwVolHeader, &FileHeader); - if (!EFI_ERROR (Status)) { - Status = SecFfsFindSectionData (EFI_SECTION_PE32, FileHeader, Pe32Data); - return Status; - } - } while (!EFI_ERROR (Status)); - - return Status; -}