Method growVolume

ffsengine.cpp:4168–4212

}

UINT8 FfsEngine::growVolume(QByteArray & header, const UINT32 size, UINT32 & newSize)
{
    // Check sanity
    if ((UINT32)header.size() < sizeof(EFI_FIRMWARE_VOLUME_HEADER))
        return ERR_INVALID_VOLUME;

    // Adjust new size to be representable by current FvBlockMap
    EFI_FIRMWARE_VOLUME_HEADER* volumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*)header.data();
    EFI_FV_BLOCK_MAP_ENTRY* blockMap = (EFI_FV_BLOCK_MAP_ENTRY*)(header.data() + sizeof(EFI_FIRMWARE_VOLUME_HEADER));

    // Get block map size
    UINT32 blockMapSize = volumeHeader->HeaderLength - sizeof(EFI_FIRMWARE_VOLUME_HEADER);
    if (blockMapSize % sizeof(EFI_FV_BLOCK_MAP_ENTRY))
        return ERR_INVALID_VOLUME;
    UINT32 blockMapCount = blockMapSize / sizeof(EFI_FV_BLOCK_MAP_ENTRY);

    // Check blockMap validity
    if (blockMap[blockMapCount - 1].NumBlocks != 0 || blockMap[blockMapCount - 1].Length != 0)
        return ERR_INVALID_VOLUME;

    // Case of complex blockMap
    if (blockMapCount > 2)
        return ERR_COMPLEX_BLOCK_MAP;

    // Calculate new size
    if (newSize <= size)
        return ERR_INVALID_PARAMETER;

    newSize += blockMap[0].Length - newSize % blockMap[0].Length;

    // Recalculate number of blocks
    blockMap[0].NumBlocks = newSize / blockMap[0].Length;

    // Set new volume size
    volumeHeader->FvLength = 0;
    for (UINT8 i = 0; i < blockMapCount; i++) {
        volumeHeader->FvLength += blockMap[i].NumBlocks * blockMap[i].Length;
    }

    // Recalculate volume header checksum
    volumeHeader->Checksum = 0;
    volumeHeader->Checksum = calculateChecksum16((const UINT16*)volumeHeader, volumeHeader->HeaderLength);

    return ERR_SUCCESS;
}

UINT8 FfsEngine::reconstructImageFile(QByteArray & reconstructed)
{