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Diffstat (limited to 'MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.c')
| -rw-r--r-- | MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.c b/MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.c new file mode 100644 index 000000000000..c07859a90762 --- /dev/null +++ b/MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.c @@ -0,0 +1,454 @@ +/** @file + Provide generic extract guided section functions for Dxe phase. + + Copyright (c) 2007 - 2012, Intel Corporation. All rights reserved.<BR> + 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. + +**/ + +#include <PiDxe.h> + +#include <Library/DebugLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/MemoryAllocationLib.h> +#include <Library/ExtractGuidedSectionLib.h> +#include <Library/UefiBootServicesTableLib.h> + +#define EXTRACT_HANDLER_TABLE_SIZE 0x10 + +UINT32 mNumberOfExtractHandler = 0; +UINT32 mMaxNumberOfExtractHandler = 0; + +GUID *mExtractHandlerGuidTable = NULL; +EXTRACT_GUIDED_SECTION_DECODE_HANDLER *mExtractDecodeHandlerTable = NULL; +EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *mExtractGetInfoHandlerTable = NULL; + +/** + Reallocates more global memory to store the registered guid and Handler list. + + @retval RETURN_SUCCESS Reallocated more global memory space to store guid and function tables. + @retval RETURN_OUT_OF_RESOURCES Not enough memory to allocate. +**/ +RETURN_STATUS +EFIAPI +ReallocateExtractHandlerTable ( + ) +{ + // + // Reallocate memory for GuidTable + // + mExtractHandlerGuidTable = ReallocatePool ( + mMaxNumberOfExtractHandler * sizeof (GUID), + (mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE) * sizeof (GUID), + mExtractHandlerGuidTable + ); + + if (mExtractHandlerGuidTable == NULL) { + goto Done; + } + + // + // Reallocate memory for Decode handler Table + // + mExtractDecodeHandlerTable = ReallocatePool ( + mMaxNumberOfExtractHandler * sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER), + (mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE) * sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER), + mExtractDecodeHandlerTable + ); + + if (mExtractDecodeHandlerTable == NULL) { + goto Done; + } + + // + // Reallocate memory for GetInfo handler Table + // + mExtractGetInfoHandlerTable = ReallocatePool ( + mMaxNumberOfExtractHandler * sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER), + (mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE) * sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER), + mExtractGetInfoHandlerTable + ); + + if (mExtractGetInfoHandlerTable == NULL) { + goto Done; + } + + // + // Increase max handler number + // + mMaxNumberOfExtractHandler = mMaxNumberOfExtractHandler + EXTRACT_HANDLER_TABLE_SIZE; + return RETURN_SUCCESS; + +Done: + if (mExtractHandlerGuidTable != NULL) { + FreePool (mExtractHandlerGuidTable); + } + if (mExtractDecodeHandlerTable != NULL) { + FreePool (mExtractDecodeHandlerTable); + } + if (mExtractGetInfoHandlerTable != NULL) { + FreePool (mExtractGetInfoHandlerTable); + } + + return RETURN_OUT_OF_RESOURCES; +} +/** + Constructor allocates the global memory to store the registered guid and Handler list. + + @param ImageHandle The firmware allocated handle for the EFI image. + @param SystemTable A pointer to the EFI System Table. + + @retval RETURN_SUCCESS Allocated the global memory space to store guid and function tables. + @retval RETURN_OUT_OF_RESOURCES Not enough memory to allocate. +**/ +RETURN_STATUS +EFIAPI +DxeExtractGuidedSectionLibConstructor ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + return ReallocateExtractHandlerTable (); +} + +/** + Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers(). + + Sets ExtractHandlerGuidTable so it points at a callee allocated array of registered GUIDs. + The total number of GUIDs in the array are returned. Since the array of GUIDs is callee allocated + and caller must treat this array of GUIDs as read-only data. + If ExtractHandlerGuidTable is NULL, then ASSERT(). + + @param[out] ExtractHandlerGuidTable A pointer to the array of GUIDs that have been registered through + ExtractGuidedSectionRegisterHandlers(). + + @return The number of the supported extract guided Handler. + +**/ +UINTN +EFIAPI +ExtractGuidedSectionGetGuidList ( + OUT GUID **ExtractHandlerGuidTable + ) +{ + ASSERT (ExtractHandlerGuidTable != NULL); + + *ExtractHandlerGuidTable = mExtractHandlerGuidTable; + return mNumberOfExtractHandler; +} + +/** + Registers handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and EXTRACT_GUIDED_SECTION_DECODE_HANDLER + for a specific GUID section type. + + Registers the handlers specified by GetInfoHandler and DecodeHandler with the GUID specified by SectionGuid. + If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED. + If there are not enough resources available to register the handlers then RETURN_OUT_OF_RESOURCES is returned. + + If SectionGuid is NULL, then ASSERT(). + If GetInfoHandler is NULL, then ASSERT(). + If DecodeHandler is NULL, then ASSERT(). + + @param[in] SectionGuid A pointer to the GUID associated with the the handlers + of the GUIDed section type being registered. + @param[in] GetInfoHandler The pointer to a function that examines a GUIDed section and returns the + size of the decoded buffer and the size of an optional scratch buffer + required to actually decode the data in a GUIDed section. + @param[in] DecodeHandler The pointer to a function that decodes a GUIDed section into a caller + allocated output buffer. + + @retval RETURN_SUCCESS The handlers were registered. + @retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers. + +**/ +RETURN_STATUS +EFIAPI +ExtractGuidedSectionRegisterHandlers ( + IN CONST GUID *SectionGuid, + IN EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER GetInfoHandler, + IN EXTRACT_GUIDED_SECTION_DECODE_HANDLER DecodeHandler + ) +{ + UINT32 Index; + VOID *GuidData; + + // + // Check input parameter. + // + ASSERT (SectionGuid != NULL); + ASSERT (GetInfoHandler != NULL); + ASSERT (DecodeHandler != NULL); + + // + // Search the match registered GetInfo handler for the input guided section. + // + for (Index = 0; Index < mNumberOfExtractHandler; Index ++) { + if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionGuid)) { + // + // If the guided handler has been registered before, only update its handler. + // + mExtractDecodeHandlerTable [Index] = DecodeHandler; + mExtractGetInfoHandlerTable [Index] = GetInfoHandler; + return RETURN_SUCCESS; + } + } + + // + // Check the global table is enough to contain new Handler. + // + if (mNumberOfExtractHandler >= mMaxNumberOfExtractHandler) { + if (ReallocateExtractHandlerTable () != RETURN_SUCCESS) { + return RETURN_OUT_OF_RESOURCES; + } + } + + // + // Register new Handler and guid value. + // + CopyGuid (&mExtractHandlerGuidTable [mNumberOfExtractHandler], SectionGuid); + mExtractDecodeHandlerTable [mNumberOfExtractHandler] = DecodeHandler; + mExtractGetInfoHandlerTable [mNumberOfExtractHandler++] = GetInfoHandler; + + // + // Install the Guided Section GUID configuration table to record the GUID itself. + // Then the content of the configuration table buffer will be the same as the GUID value itself. + // + GuidData = AllocateCopyPool (sizeof (GUID), (VOID *) SectionGuid); + if (GuidData != NULL) { + gBS->InstallConfigurationTable ((EFI_GUID *) SectionGuid, GuidData); + } + + return RETURN_SUCCESS; +} + +/** + Retrieves a GUID from a GUIDed section and uses that GUID to select an associated handler of type + EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers(). + The selected handler is used to retrieve and return the size of the decoded buffer and the size of an + optional scratch buffer required to actually decode the data in a GUIDed section. + + Examines a GUIDed section specified by InputSection. + If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(), + then RETURN_UNSUPPORTED is returned. + If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler + of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers() + is used to retrieve the OututBufferSize, ScratchSize, and Attributes values. The return status from the handler of + type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER is returned. + + If InputSection is NULL, then ASSERT(). + If OutputBufferSize is NULL, then ASSERT(). + If ScratchBufferSize is NULL, then ASSERT(). + If SectionAttribute is NULL, then ASSERT(). + + @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file. + @param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer + specified by InputSection were decoded. + @param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space if the buffer specified by + InputSection were decoded. + @param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes field of + EFI_GUID_DEFINED_SECTION in the PI Specification. + + @retval RETURN_SUCCESS Successfully obtained the required information. + @retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of + the GUIDs registered with ExtractGuidedSectionRegisterHandlers(). + @retval Others The return status from the handler associated with the GUID retrieved from + the section specified by InputSection. + +**/ +RETURN_STATUS +EFIAPI +ExtractGuidedSectionGetInfo ( + IN CONST VOID *InputSection, + OUT UINT32 *OutputBufferSize, + OUT UINT32 *ScratchBufferSize, + OUT UINT16 *SectionAttribute + ) +{ + UINT32 Index; + EFI_GUID *SectionDefinitionGuid; + + ASSERT (InputSection != NULL); + ASSERT (OutputBufferSize != NULL); + ASSERT (ScratchBufferSize != NULL); + ASSERT (SectionAttribute != NULL); + + if (IS_SECTION2 (InputSection)) { + SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid); + } else { + SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid); + } + + // + // Search the match registered GetInfo handler for the input guided section. + // + for (Index = 0; Index < mNumberOfExtractHandler; Index ++) { + if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionDefinitionGuid)) { + // + // Call the match handler to getinfo for the input section data. + // + return mExtractGetInfoHandlerTable [Index] ( + InputSection, + OutputBufferSize, + ScratchBufferSize, + SectionAttribute + ); + } + } + + // + // Not found, the input guided section is not supported. + // + return RETURN_UNSUPPORTED; +} + +/** + Retrieves the GUID from a GUIDed section and uses that GUID to select an associated handler of type + EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers(). + The selected handler is used to decode the data in a GUIDed section and return the result in a caller + allocated output buffer. + + Decodes the GUIDed section specified by InputSection. + If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(), + then RETURN_UNSUPPORTED is returned. + If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler + of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers() + is used to decode InputSection into the buffer specified by OutputBuffer and the authentication status of this + decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the data in InputSection, + then OutputBuffer is set to point at the data in InputSection. Otherwise, the decoded data will be placed in caller + allocated buffer specified by OutputBuffer. This function is responsible for computing the EFI_AUTH_STATUS_PLATFORM_OVERRIDE + bit of in AuthenticationStatus. The return status from the handler of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER is returned. + + If InputSection is NULL, then ASSERT(). + If OutputBuffer is NULL, then ASSERT(). + If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT(). + If AuthenticationStatus is NULL, then ASSERT(). + + @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file. + @param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation. + @param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation. + @param[out] AuthenticationStatus + A pointer to the authentication status of the decoded output buffer. See the definition + of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI section of the PI + Specification. + + @retval RETURN_SUCCESS The buffer specified by InputSection was decoded. + @retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports. + @retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded. + +**/ +RETURN_STATUS +EFIAPI +ExtractGuidedSectionDecode ( + IN CONST VOID *InputSection, + OUT VOID **OutputBuffer, + IN VOID *ScratchBuffer, OPTIONAL + OUT UINT32 *AuthenticationStatus + ) +{ + UINT32 Index; + EFI_GUID *SectionDefinitionGuid; + + // + // Check the input parameters + // + ASSERT (InputSection != NULL); + ASSERT (OutputBuffer != NULL); + ASSERT (AuthenticationStatus != NULL); + + if (IS_SECTION2 (InputSection)) { + SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid); + } else { + SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid); + } + + // + // Search the match registered extract handler for the input guided section. + // + for (Index = 0; Index < mNumberOfExtractHandler; Index ++) { + if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionDefinitionGuid)) { + // + // Call the match handler to extract raw data for the input section data. + // + return mExtractDecodeHandlerTable [Index] ( + InputSection, + OutputBuffer, + ScratchBuffer, + AuthenticationStatus + ); + } + } + + // + // Not found, the input guided section is not supported. + // + return RETURN_UNSUPPORTED; +} + +/** + Retrieves handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and + EXTRACT_GUIDED_SECTION_DECODE_HANDLER for a specific GUID section type. + + Retrieves the handlers associated with SectionGuid and returns them in + GetInfoHandler and DecodeHandler. + + If the GUID value specified by SectionGuid has not been registered, then + return RETURN_NOT_FOUND. + + If SectionGuid is NULL, then ASSERT(). + + @param[in] SectionGuid A pointer to the GUID associated with the handlersof the GUIDed + section type being retrieved. + @param[out] GetInfoHandler Pointer to a function that examines a GUIDed section and returns + the size of the decoded buffer and the size of an optional scratch + buffer required to actually decode the data in a GUIDed section. + This is an optional parameter that may be NULL. If it is NULL, then + the previously registered handler is not returned. + @param[out] DecodeHandler Pointer to a function that decodes a GUIDed section into a caller + allocated output buffer. This is an optional parameter that may be NULL. + If it is NULL, then the previously registered handler is not returned. + + @retval RETURN_SUCCESS The handlers were retrieved. + @retval RETURN_NOT_FOUND No handlers have been registered with the specified GUID. + +**/ +RETURN_STATUS +EFIAPI +ExtractGuidedSectionGetHandlers ( + IN CONST GUID *SectionGuid, + OUT EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *GetInfoHandler, OPTIONAL + OUT EXTRACT_GUIDED_SECTION_DECODE_HANDLER *DecodeHandler OPTIONAL + ) +{ + UINT32 Index; + + // + // Check input parameter. + // + ASSERT (SectionGuid != NULL); + + // + // Search the match registered GetInfo handler for the input guided section. + // + for (Index = 0; Index < mNumberOfExtractHandler; Index ++) { + if (CompareGuid (&mExtractHandlerGuidTable[Index], SectionGuid)) { + + // + // If the guided handler has been registered before, then return the registered handlers. + // + if (GetInfoHandler != NULL) { + *GetInfoHandler = mExtractGetInfoHandlerTable[Index]; + } + if (DecodeHandler != NULL) { + *DecodeHandler = mExtractDecodeHandlerTable[Index]; + } + return RETURN_SUCCESS; + } + } + return RETURN_NOT_FOUND; +} |