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514 lines
21 KiB
C
514 lines
21 KiB
C
/** @file
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Provide generic extract guided section functions for PEI phase.
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Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiPei.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/HobLib.h>
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#include <Library/ExtractGuidedSectionLib.h>
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#define PEI_EXTRACT_HANDLER_INFO_SIGNATURE SIGNATURE_32 ('P', 'E', 'H', 'I')
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typedef struct {
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UINT32 Signature;
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UINT32 NumberOfExtractHandler;
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GUID *ExtractHandlerGuidTable;
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EXTRACT_GUIDED_SECTION_DECODE_HANDLER *ExtractDecodeHandlerTable;
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EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *ExtractGetInfoHandlerTable;
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} PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO;
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/**
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Build guid hob for the global memory to store the registered guid and Handler list.
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If GuidHob exists, HandlerInfo will be directly got from Guid hob data.
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@param[in, out] InfoPointer The pointer to pei handler information structure.
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@retval RETURN_SUCCESS Build Guid hob for the global memory space to store guid and function tables.
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@retval RETURN_OUT_OF_RESOURCES No enough memory to allocated.
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**/
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RETURN_STATUS
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PeiGetExtractGuidedSectionHandlerInfo (
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IN OUT PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO **InfoPointer
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)
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{
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PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
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EFI_PEI_HOB_POINTERS Hob;
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//
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// First try to get handler information from guid hob specified by CallerId.
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//
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Hob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, GetHobList ());
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while (Hob.Raw != NULL) {
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if (CompareGuid (&(Hob.Guid->Name), &gEfiCallerIdGuid)) {
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HandlerInfo = (PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *) GET_GUID_HOB_DATA (Hob.Guid);
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if (HandlerInfo->Signature == PEI_EXTRACT_HANDLER_INFO_SIGNATURE) {
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//
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// Update Table Pointer when hob start address is changed.
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//
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if (HandlerInfo->ExtractHandlerGuidTable != (GUID *) (HandlerInfo + 1)) {
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HandlerInfo->ExtractHandlerGuidTable = (GUID *) (HandlerInfo + 1);
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HandlerInfo->ExtractDecodeHandlerTable = (EXTRACT_GUIDED_SECTION_DECODE_HANDLER *) (
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(UINT8 *)HandlerInfo->ExtractHandlerGuidTable +
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PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (GUID)
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);
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HandlerInfo->ExtractGetInfoHandlerTable = (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *) (
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(UINT8 *)HandlerInfo->ExtractDecodeHandlerTable +
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PcdGet32 (PcdMaximumGuidedExtractHandler) *
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sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER)
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);
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}
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//
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// Return HandlerInfo pointer.
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//
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*InfoPointer = HandlerInfo;
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return EFI_SUCCESS;
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}
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}
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Hob.Raw = GET_NEXT_HOB (Hob);
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Hob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, Hob.Raw);
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}
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//
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// If Guid Hob is not found, Build CallerId Guid hob to store Handler Info
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//
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HandlerInfo = BuildGuidHob (
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&gEfiCallerIdGuid,
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sizeof (PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO) +
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PcdGet32 (PcdMaximumGuidedExtractHandler) *
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(sizeof (GUID) + sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER) + sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER))
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);
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if (HandlerInfo == NULL) {
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//
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// No enough resource to build guid hob.
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//
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*InfoPointer = NULL;
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// Init HandlerInfo structure
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//
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HandlerInfo->Signature = PEI_EXTRACT_HANDLER_INFO_SIGNATURE;
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HandlerInfo->NumberOfExtractHandler = 0;
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HandlerInfo->ExtractHandlerGuidTable = (GUID *) (HandlerInfo + 1);
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HandlerInfo->ExtractDecodeHandlerTable = (EXTRACT_GUIDED_SECTION_DECODE_HANDLER *) (
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(UINT8 *)HandlerInfo->ExtractHandlerGuidTable +
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PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (GUID)
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);
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HandlerInfo->ExtractGetInfoHandlerTable = (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *) (
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(UINT8 *)HandlerInfo->ExtractDecodeHandlerTable +
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PcdGet32 (PcdMaximumGuidedExtractHandler) *
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sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER)
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);
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//
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// return the created HandlerInfo.
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//
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*InfoPointer = HandlerInfo;
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return EFI_SUCCESS;
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}
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/**
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Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers().
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Sets ExtractHandlerGuidTable so it points at a callee allocated array of registered GUIDs.
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The total number of GUIDs in the array are returned. Since the array of GUIDs is callee allocated
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and caller must treat this array of GUIDs as read-only data.
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If ExtractHandlerGuidTable is NULL, then ASSERT().
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@param[out] ExtractHandlerGuidTable A pointer to the array of GUIDs that have been registered through
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ExtractGuidedSectionRegisterHandlers().
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@return the number of the supported extract guided Handler.
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**/
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UINTN
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EFIAPI
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ExtractGuidedSectionGetGuidList (
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OUT GUID **ExtractHandlerGuidTable
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)
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{
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EFI_STATUS Status;
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PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
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ASSERT (ExtractHandlerGuidTable != NULL);
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//
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// Get all registered handler information
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//
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Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
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if (EFI_ERROR (Status)) {
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*ExtractHandlerGuidTable = NULL;
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return 0;
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}
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//
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// Get GuidTable and Table Number
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//
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ASSERT (HandlerInfo != NULL);
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*ExtractHandlerGuidTable = HandlerInfo->ExtractHandlerGuidTable;
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return HandlerInfo->NumberOfExtractHandler;
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}
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/**
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Registers handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and EXTRACT_GUIDED_SECTION_DECODE_HANDLER
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for a specific GUID section type.
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Registers the handlers specified by GetInfoHandler and DecodeHandler with the GUID specified by SectionGuid.
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If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED.
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If there are not enough resources available to register the handlers then RETURN_OUT_OF_RESOURCES is returned.
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If SectionGuid is NULL, then ASSERT().
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If GetInfoHandler is NULL, then ASSERT().
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If DecodeHandler is NULL, then ASSERT().
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@param[in] SectionGuid A pointer to the GUID associated with the the handlers
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of the GUIDed section type being registered.
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@param[in] GetInfoHandler The pointer to a function that examines a GUIDed section and returns the
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size of the decoded buffer and the size of an optional scratch buffer
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required to actually decode the data in a GUIDed section.
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@param[in] DecodeHandler The pointer to a function that decodes a GUIDed section into a caller
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allocated output buffer.
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@retval RETURN_SUCCESS The handlers were registered.
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@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers.
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**/
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RETURN_STATUS
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EFIAPI
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ExtractGuidedSectionRegisterHandlers (
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IN CONST GUID *SectionGuid,
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IN EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER GetInfoHandler,
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IN EXTRACT_GUIDED_SECTION_DECODE_HANDLER DecodeHandler
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)
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{
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EFI_STATUS Status;
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UINT32 Index;
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PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
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//
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// Check input parameter
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//
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ASSERT (SectionGuid != NULL);
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ASSERT (GetInfoHandler != NULL);
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ASSERT (DecodeHandler != NULL);
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//
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// Get the registered handler information
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//
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Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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//
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// Search the match registered GetInfo handler for the input guided section.
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//
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ASSERT (HandlerInfo != NULL);
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for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {
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if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionGuid)) {
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//
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// If the guided handler has been registered before, only update its handler.
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//
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HandlerInfo->ExtractDecodeHandlerTable [Index] = DecodeHandler;
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HandlerInfo->ExtractGetInfoHandlerTable [Index] = GetInfoHandler;
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return RETURN_SUCCESS;
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}
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}
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//
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// Check the global table is enough to contain new Handler.
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//
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if (HandlerInfo->NumberOfExtractHandler >= PcdGet32 (PcdMaximumGuidedExtractHandler)) {
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return RETURN_OUT_OF_RESOURCES;
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}
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//
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// Register new Handler and guid value.
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//
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CopyGuid (HandlerInfo->ExtractHandlerGuidTable + HandlerInfo->NumberOfExtractHandler, SectionGuid);
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HandlerInfo->ExtractDecodeHandlerTable [HandlerInfo->NumberOfExtractHandler] = DecodeHandler;
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HandlerInfo->ExtractGetInfoHandlerTable [HandlerInfo->NumberOfExtractHandler++] = GetInfoHandler;
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//
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// Build the Guided Section GUID HOB to record the GUID itself.
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// Then the content of the GUIDed HOB will be the same as the GUID value itself.
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//
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BuildGuidDataHob (
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(EFI_GUID *) SectionGuid,
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(VOID *) SectionGuid,
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sizeof (GUID)
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);
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return RETURN_SUCCESS;
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}
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/**
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Retrieves a GUID from a GUIDed section and uses that GUID to select an associated handler of type
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EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
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The selected handler is used to retrieve and return the size of the decoded buffer and the size of an
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optional scratch buffer required to actually decode the data in a GUIDed section.
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Examines a GUIDed section specified by InputSection.
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If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
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then RETURN_UNSUPPORTED is returned.
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If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler
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of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers()
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is used to retrieve the OututBufferSize, ScratchSize, and Attributes values. The return status from the handler of
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type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER is returned.
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If InputSection is NULL, then ASSERT().
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If OutputBufferSize is NULL, then ASSERT().
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If ScratchBufferSize is NULL, then ASSERT().
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If SectionAttribute is NULL, then ASSERT().
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@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
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@param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer
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specified by InputSection were decoded.
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@param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space if the buffer specified by
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InputSection were decoded.
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@param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes field of
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EFI_GUID_DEFINED_SECTION in the PI Specification.
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@retval RETURN_SUCCESS Get the required information successfully.
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@retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of
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the GUIDs registered with ExtractGuidedSectionRegisterHandlers().
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@retval Others The return status from the handler associated with the GUID retrieved from
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the section specified by InputSection.
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**/
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RETURN_STATUS
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EFIAPI
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ExtractGuidedSectionGetInfo (
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IN CONST VOID *InputSection,
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OUT UINT32 *OutputBufferSize,
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OUT UINT32 *ScratchBufferSize,
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OUT UINT16 *SectionAttribute
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)
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{
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UINT32 Index;
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EFI_STATUS Status;
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PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
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EFI_GUID *SectionDefinitionGuid;
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//
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// Check input parameter
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//
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ASSERT (InputSection != NULL);
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ASSERT (OutputBufferSize != NULL);
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ASSERT (ScratchBufferSize != NULL);
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ASSERT (SectionAttribute != NULL);
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//
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// Get all registered handler information.
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//
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Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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if (IS_SECTION2 (InputSection)) {
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SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid);
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} else {
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SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid);
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}
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//
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// Search the match registered GetInfo handler for the input guided section.
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//
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ASSERT (HandlerInfo != NULL);
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for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {
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if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionDefinitionGuid)) {
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//
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// Call the match handler to get information for the input section data.
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//
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return HandlerInfo->ExtractGetInfoHandlerTable [Index] (
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InputSection,
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OutputBufferSize,
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ScratchBufferSize,
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SectionAttribute
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);
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}
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}
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//
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// Not found, the input guided section is not supported.
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//
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return RETURN_UNSUPPORTED;
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}
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/**
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Retrieves the GUID from a GUIDed section and uses that GUID to select an associated handler of type
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EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
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The selected handler is used to decode the data in a GUIDed section and return the result in a caller
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allocated output buffer.
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Decodes the GUIDed section specified by InputSection.
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If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
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then RETURN_UNSUPPORTED is returned.
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If the GUID of InputSection does match the GUID that this handler supports, then the the associated handler
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of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers()
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is used to decode InputSection into the buffer specified by OutputBuffer and the authentication status of this
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decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the data in InputSection,
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then OutputBuffer is set to point at the data in InputSection. Otherwise, the decoded data will be placed in caller
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allocated buffer specified by OutputBuffer. This function is responsible for computing the EFI_AUTH_STATUS_PLATFORM_OVERRIDE
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bit of in AuthenticationStatus. The return status from the handler of type EXTRACT_GUIDED_SECTION_DECODE_HANDLER is returned.
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If InputSection is NULL, then ASSERT().
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If OutputBuffer is NULL, then ASSERT().
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If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT().
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If AuthenticationStatus is NULL, then ASSERT().
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@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
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@param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
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@param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation.
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@param[out] AuthenticationStatus
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A pointer to the authentication status of the decoded output buffer. See the definition
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of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI section of the PI
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Specification.
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@retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
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@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
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@retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
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**/
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RETURN_STATUS
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EFIAPI
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ExtractGuidedSectionDecode (
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IN CONST VOID *InputSection,
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OUT VOID **OutputBuffer,
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IN VOID *ScratchBuffer, OPTIONAL
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OUT UINT32 *AuthenticationStatus
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)
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{
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UINT32 Index;
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EFI_STATUS Status;
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PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
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EFI_GUID *SectionDefinitionGuid;
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//
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// Check input parameter
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//
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ASSERT (InputSection != NULL);
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ASSERT (OutputBuffer != NULL);
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ASSERT (AuthenticationStatus != NULL);
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//
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// Get all registered handler information.
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//
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Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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if (IS_SECTION2 (InputSection)) {
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SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION2 *) InputSection)->SectionDefinitionGuid);
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} else {
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SectionDefinitionGuid = &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid);
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}
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//
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// Search the match registered Extract handler for the input guided section.
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//
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ASSERT (HandlerInfo != NULL);
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for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {
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if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionDefinitionGuid)) {
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//
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// Call the match handler to extract raw data for the input guided section.
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//
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return HandlerInfo->ExtractDecodeHandlerTable [Index] (
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InputSection,
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OutputBuffer,
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ScratchBuffer,
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AuthenticationStatus
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);
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}
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}
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//
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// Not found, the input guided section is not supported.
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//
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return RETURN_UNSUPPORTED;
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}
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/**
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Retrieves handlers of type EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER and
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EXTRACT_GUIDED_SECTION_DECODE_HANDLER for a specific GUID section type.
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Retrieves the handlers associated with SectionGuid and returns them in
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GetInfoHandler and DecodeHandler.
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If the GUID value specified by SectionGuid has not been registered, then
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return RETURN_NOT_FOUND.
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If SectionGuid is NULL, then ASSERT().
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@param[in] SectionGuid A pointer to the GUID associated with the handlersof the GUIDed
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section type being retrieved.
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@param[out] GetInfoHandler Pointer to a function that examines a GUIDed section and returns
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the size of the decoded buffer and the size of an optional scratch
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buffer required to actually decode the data in a GUIDed section.
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This is an optional parameter that may be NULL. If it is NULL, then
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the previously registered handler is not returned.
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@param[out] DecodeHandler Pointer to a function that decodes a GUIDed section into a caller
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allocated output buffer. This is an optional parameter that may be NULL.
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If it is NULL, then the previously registered handler is not returned.
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@retval RETURN_SUCCESS The handlers were retrieved.
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@retval RETURN_NOT_FOUND No handlers have been registered with the specified GUID.
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**/
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RETURN_STATUS
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EFIAPI
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ExtractGuidedSectionGetHandlers (
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IN CONST GUID *SectionGuid,
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OUT EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *GetInfoHandler, OPTIONAL
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OUT EXTRACT_GUIDED_SECTION_DECODE_HANDLER *DecodeHandler OPTIONAL
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)
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{
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EFI_STATUS Status;
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UINT32 Index;
|
|
PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
|
|
|
|
//
|
|
// Check input parameter
|
|
//
|
|
ASSERT (SectionGuid != NULL);
|
|
|
|
//
|
|
// Get the registered handler information
|
|
//
|
|
Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// Search the match registered GetInfo handler for the input guided section.
|
|
//
|
|
ASSERT (HandlerInfo != NULL);
|
|
for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {
|
|
if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionGuid)) {
|
|
|
|
//
|
|
// If the guided handler has been registered before, then return the registered handlers.
|
|
//
|
|
if (GetInfoHandler != NULL) {
|
|
*GetInfoHandler = HandlerInfo->ExtractGetInfoHandlerTable[Index];
|
|
}
|
|
if (DecodeHandler != NULL) {
|
|
*DecodeHandler = HandlerInfo->ExtractDecodeHandlerTable[Index];
|
|
}
|
|
return RETURN_SUCCESS;
|
|
}
|
|
}
|
|
return RETURN_NOT_FOUND;
|
|
}
|