X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FLibrary%2FPeiExtractGuidedSectionLib%2FPeiExtractGuidedSectionLib.c;h=5d12016bc7720c82de9256b5c3b20f623b6ea45d;hb=d0e2f8232a26453fc0191629ed44ff2a46ea073e;hp=72add417b66ba4cc086ffaf60281640512e99fe9;hpb=b911d09f5525e5bb27d5c9dffcfd6120e095ac84;p=mirror_edk2.git
diff --git a/MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.c b/MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.c
index 72add417b6..5d12016bc7 100644
--- a/MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.c
+++ b/MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.c
@@ -1,14 +1,8 @@
/** @file
Provide generic extract guided section functions for PEI phase.
- Copyright (c) 2007 - 2008, 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.
+ Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -20,7 +14,7 @@
#include
#include
-#define PEI_EXTRACT_HANDLER_INFO_SIGNATURE EFI_SIGNATURE_32 ('P', 'E', 'H', 'I')
+#define PEI_EXTRACT_HANDLER_INFO_SIGNATURE SIGNATURE_32 ('P', 'E', 'H', 'I')
typedef struct {
UINT32 Signature;
@@ -30,26 +24,25 @@ typedef struct {
EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *ExtractGetInfoHandlerTable;
} PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO;
-/**
+/**
Build guid hob for the global memory to store the registered guid and Handler list.
If GuidHob exists, HandlerInfo will be directly got from Guid hob data.
- @param[in, out] InfoPointer Pointer to pei handler info structure.
+ @param[in, out] InfoPointer The pointer to pei handler information structure.
- @retval RETURN_SUCCESS Build Guid hob for the global memory space to store guid and funciton tables.
- @retval RETURN_OUT_OF_RESOURCES No enough memory to allocated.
+ @retval RETURN_SUCCESS Build Guid hob for the global memory space to store guid and function tables.
+ @retval RETURN_OUT_OF_RESOURCES No enough memory to allocated.
**/
RETURN_STATUS
-EFIAPI
PeiGetExtractGuidedSectionHandlerInfo (
IN OUT PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO **InfoPointer
)
{
PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
EFI_PEI_HOB_POINTERS Hob;
-
+
//
- // First try to get handler info from guid hob specified by CallerId.
+ // First try to get handler information from guid hob specified by CallerId.
//
Hob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, GetHobList ());
while (Hob.Raw != NULL) {
@@ -62,13 +55,13 @@ PeiGetExtractGuidedSectionHandlerInfo (
if (HandlerInfo->ExtractHandlerGuidTable != (GUID *) (HandlerInfo + 1)) {
HandlerInfo->ExtractHandlerGuidTable = (GUID *) (HandlerInfo + 1);
HandlerInfo->ExtractDecodeHandlerTable = (EXTRACT_GUIDED_SECTION_DECODE_HANDLER *) (
- (UINT8 *)HandlerInfo->ExtractHandlerGuidTable +
+ (UINT8 *)HandlerInfo->ExtractHandlerGuidTable +
PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (GUID)
);
HandlerInfo->ExtractGetInfoHandlerTable = (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *) (
- (UINT8 *)HandlerInfo->ExtractDecodeHandlerTable +
- PcdGet32 (PcdMaximumGuidedExtractHandler) *
- sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER)
+ (UINT8 *)HandlerInfo->ExtractDecodeHandlerTable +
+ PcdGet32 (PcdMaximumGuidedExtractHandler) *
+ sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER)
);
}
//
@@ -81,20 +74,21 @@ PeiGetExtractGuidedSectionHandlerInfo (
Hob.Raw = GET_NEXT_HOB (Hob);
Hob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, Hob.Raw);
}
-
+
//
// If Guid Hob is not found, Build CallerId Guid hob to store Handler Info
//
HandlerInfo = BuildGuidHob (
- &gEfiCallerIdGuid,
+ &gEfiCallerIdGuid,
sizeof (PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO) +
- PcdGet32 (PcdMaximumGuidedExtractHandler) *
+ PcdGet32 (PcdMaximumGuidedExtractHandler) *
(sizeof (GUID) + sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER) + sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER))
);
if (HandlerInfo == NULL) {
//
// No enough resource to build guid hob.
//
+ *InfoPointer = NULL;
return EFI_OUT_OF_RESOURCES;
}
//
@@ -104,13 +98,13 @@ PeiGetExtractGuidedSectionHandlerInfo (
HandlerInfo->NumberOfExtractHandler = 0;
HandlerInfo->ExtractHandlerGuidTable = (GUID *) (HandlerInfo + 1);
HandlerInfo->ExtractDecodeHandlerTable = (EXTRACT_GUIDED_SECTION_DECODE_HANDLER *) (
- (UINT8 *)HandlerInfo->ExtractHandlerGuidTable +
+ (UINT8 *)HandlerInfo->ExtractHandlerGuidTable +
PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (GUID)
);
HandlerInfo->ExtractGetInfoHandlerTable = (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *) (
- (UINT8 *)HandlerInfo->ExtractDecodeHandlerTable +
- PcdGet32 (PcdMaximumGuidedExtractHandler) *
- sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER)
+ (UINT8 *)HandlerInfo->ExtractDecodeHandlerTable +
+ PcdGet32 (PcdMaximumGuidedExtractHandler) *
+ sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER)
);
//
// return the created HandlerInfo.
@@ -119,13 +113,19 @@ PeiGetExtractGuidedSectionHandlerInfo (
return EFI_SUCCESS;
}
-/**
- Get the supported exract guided section Handler guid list.
- If ExtractHandlerGuidTable = NULL, then ASSERT.
+/**
+ 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 The extract Handler guid pointer list.
+ @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.
- @return the number of the supported extract guided Handler.
**/
UINTN
EFIAPI
@@ -143,26 +143,41 @@ ExtractGuidedSectionGetGuidList (
//
Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
if (EFI_ERROR (Status)) {
- return Status;
+ *ExtractHandlerGuidTable = NULL;
+ return 0;
}
//
// Get GuidTable and Table Number
//
+ ASSERT (HandlerInfo != NULL);
*ExtractHandlerGuidTable = HandlerInfo->ExtractHandlerGuidTable;
return HandlerInfo->NumberOfExtractHandler;
}
-/**
- Register Guided Section Extract and GetInfo handler.
+/**
+ 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.
- @param[in] SectionGuid The guid matches this Extraction function.
- @param[in] GetInfoHandler Function to get info from guided section.
- @param[in] DecodeHandler Function to extract guided section.
-
- @retval RETURN_SUCCESS Register Guided Section Extract function successfully.
- @retval RETURN_OUT_OF_RESOURCES Resource is not enough to register new function.
- @retval RETURN_INVALID_PARAMETER Input pointer to Guid value is not valid.
**/
RETURN_STATUS
EFIAPI
@@ -177,11 +192,13 @@ ExtractGuidedSectionRegisterHandlers (
PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
//
- // Check input paramter.
+ // Check input parameter
//
- if (SectionGuid == NULL) {
- return RETURN_INVALID_PARAMETER;
- }
+ ASSERT (SectionGuid != NULL);
+ ASSERT (GetInfoHandler != NULL);
+ ASSERT (DecodeHandler != NULL);
+
+
//
// Get the registered handler information
@@ -194,6 +211,7 @@ ExtractGuidedSectionRegisterHandlers (
//
// 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)) {
//
@@ -211,36 +229,59 @@ ExtractGuidedSectionRegisterHandlers (
if (HandlerInfo->NumberOfExtractHandler >= PcdGet32 (PcdMaximumGuidedExtractHandler)) {
return RETURN_OUT_OF_RESOURCES;
}
-
+
//
// Register new Handler and guid value.
//
CopyGuid (HandlerInfo->ExtractHandlerGuidTable + HandlerInfo->NumberOfExtractHandler, SectionGuid);
HandlerInfo->ExtractDecodeHandlerTable [HandlerInfo->NumberOfExtractHandler] = DecodeHandler;
HandlerInfo->ExtractGetInfoHandlerTable [HandlerInfo->NumberOfExtractHandler++] = GetInfoHandler;
-
+
+ //
+ // Build the Guided Section GUID HOB to record the GUID itself.
+ // Then the content of the GUIDed HOB will be the same as the GUID value itself.
+ //
+ BuildGuidDataHob (
+ (EFI_GUID *) SectionGuid,
+ (VOID *) SectionGuid,
+ sizeof (GUID)
+ );
+
return RETURN_SUCCESS;
}
-/**
- Get information from the guided section. This function first gets the guid value
- from guided section header, then match this guid in the registered extract Handler list
- to its corresponding getinfo Handler.
- If not found, RETURN_INVALID_PARAMETER will be return.
- If found, it will call the getinfo Handler to get the required size and attribute.
-
- It will ASSERT () if the pointer to OutputBufferSize is NULL.
- It will ASSERT () if the pointer to ScratchBufferSize is NULL.
- It will ASSERT () if the pointer to SectionAttribute is NULL.
-
- @param[in] InputSection Buffer containing the input GUIDed section to be processed.
- @param[out] OutputBufferSize The size of OutputBuffer.
- @param[out] ScratchBufferSize The size of ScratchBuffer.
- @param[out] SectionAttribute The attribute of the input guided section.
-
- @retval RETURN_SUCCESS Get the required information successfully.
- @retval RETURN_UNSUPPORTED Guided section data is not supported.
- @retval RETURN_INVALID_PARAMETER The input data is not the valid guided section.
+/**
+ 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 Get the required information successfully.
+ @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
@@ -249,20 +290,18 @@ ExtractGuidedSectionGetInfo (
IN CONST VOID *InputSection,
OUT UINT32 *OutputBufferSize,
OUT UINT32 *ScratchBufferSize,
- OUT UINT16 *SectionAttribute
+ OUT UINT16 *SectionAttribute
)
{
UINT32 Index;
EFI_STATUS Status;
PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
-
+ EFI_GUID *SectionDefinitionGuid;
+
//
- // Check input paramter
+ // Check input parameter
//
- if (InputSection == NULL) {
- return RETURN_INVALID_PARAMETER;
- }
-
+ ASSERT (InputSection != NULL);
ASSERT (OutputBufferSize != NULL);
ASSERT (ScratchBufferSize != NULL);
ASSERT (SectionAttribute != NULL);
@@ -274,14 +313,21 @@ ExtractGuidedSectionGetInfo (
if (EFI_ERROR (Status)) {
return Status;
}
-
+
+ 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.
//
+ ASSERT (HandlerInfo != NULL);
for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {
- if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
+ if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionDefinitionGuid)) {
//
- // Call the match handler to getinfo for the input section data.
+ // Call the match handler to get information for the input section data.
//
return HandlerInfo->ExtractGetInfoHandlerTable [Index] (
InputSection,
@@ -293,71 +339,87 @@ ExtractGuidedSectionGetInfo (
}
//
- // Not found, the input guided section is not supported.
+ // Not found, the input guided section is not supported.
//
return RETURN_UNSUPPORTED;
}
-/**
- Extract data from the guided section. This function first gets the guid value
- from guided section header, then match this guid in the registered extract Handler list
- to its corresponding extract Handler.
- If not found, RETURN_INVALID_PARAMETER will be return.
- If found, it will call this extract Handler to get output data and AuthenticationStatus.
-
- It will ASSERT () if the pointer to OutputBuffer is NULL.
- It will ASSERT () if the pointer to AuthenticationStatus is NULL.
-
- @param[in] InputSection Buffer containing the input GUIDed section to be processed.
- @param[out] OutputBuffer OutputBuffer to point the start of the section's contents
- if guided data is not required prcessing. Otherwise,
- OutputBuffer to contain the output data, which is
- allocated by the caller.
- @param[out] ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
- @param[out] AuthenticationStatus
- A pointer to a caller-allocated UINT32 that indicates the
- authentication status of the output buffer.
-
- @retval RETURN_SUCCESS Get the output data, size and AuthenticationStatus successfully.
- @retval RETURN_UNSUPPORTED Guided section data is not supported to be decoded.
- @retval RETURN_INVALID_PARAMETER The input data is not the valid guided section.
-
+/**
+ 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,
- OUT VOID *ScratchBuffer, OPTIONAL
- OUT UINT32 *AuthenticationStatus
+ IN VOID *ScratchBuffer OPTIONAL,
+ OUT UINT32 *AuthenticationStatus
)
{
UINT32 Index;
EFI_STATUS Status;
PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
-
+ EFI_GUID *SectionDefinitionGuid;
+
//
// Check input parameter
//
- if (InputSection == NULL) {
- return RETURN_INVALID_PARAMETER;
- }
+ ASSERT (InputSection != NULL);
ASSERT (OutputBuffer != NULL);
ASSERT (AuthenticationStatus != NULL);
//
// Get all registered handler information.
- //
+ //
Status = PeiGetExtractGuidedSectionHandlerInfo (&HandlerInfo);
if (EFI_ERROR (Status)) {
return Status;
}
+ 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.
//
+ ASSERT (HandlerInfo != NULL);
for (Index = 0; Index < HandlerInfo->NumberOfExtractHandler; Index ++) {
- if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
+ if (CompareGuid (HandlerInfo->ExtractHandlerGuidTable + Index, SectionDefinitionGuid)) {
//
// Call the match handler to extract raw data for the input guided section.
//
@@ -371,7 +433,81 @@ ExtractGuidedSectionDecode (
}
//
- // Not found, the input guided section is not supported.
+ // 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
+ )
+{
+ EFI_STATUS Status;
+ 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;
+}