Intel Extensible Firmware Interface - Manual (Page 167)

Services — Boot Services
Version 1.10 12/01/02 5-69
Status Codes Returned
EFI_SUCCESS The list of protocol interface GUIDs installed on Handle was returned in
ProtocolBuffer . The number of protocol interface GUIDs was
returned in ProtocolBufferCount .
EFI_INVALID_PARAMETER Handle is NULL .
EFI_INVALID_PARAMETER Handle is not a valid EFI_HANDLE .
EFI_INVALID_PARAMETER ProtocolBuffer is NULL .
EFI_INVALID_PARAMETER ProtocolBufferCount is NULL .
EFI_OUT_OF_RESOURCES There is not enough pool memory to store the results.
Examples
See example in the LocateHandleBuffer() function description for an example on how
LocateHandleBuffer() , ProtocolsPerHandle() , OpenProtocol() , and
OpenProtocolInformation() can be used to traverse the entire handle database.