mirror of https://github.com/acidanthera/audk.git
276 lines
9.2 KiB
C
276 lines
9.2 KiB
C
/*++
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Copyright (c) 2007, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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DxeExtractGuidedSectionLib.c
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Abstract:
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Provide generic extract guided section functions.
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--*/
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#include <PiDxe.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/MemoryAllocationLib.h>
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#include <Library/ExtractGuidedSectionLib.h>
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STATIC GUID *mExtractHandlerGuidTable;
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STATIC UINT32 mNumberOfExtractHandler;
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STATIC EXTRACT_GUIDED_SECTION_DECODE_HANDLER *mExtractDecodeHandlerTable;
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STATIC EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *mExtractGetInfoHandlerTable;
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/**
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Construtor allocates the global memory to store the registered guid and Handler list.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval RETURN_SUCCESS Allocate the global memory space to store guid and funciton 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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EFIAPI
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DxeExtractGuidedSectionLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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//
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// Allocate global pool space to store the registered handler and its guid value.
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//
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mExtractHandlerGuidTable = (GUID *) AllocatePool (PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (GUID));
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if (mExtractHandlerGuidTable == NULL) {
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return RETURN_OUT_OF_RESOURCES;
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}
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mExtractDecodeHandlerTable = (EXTRACT_GUIDED_SECTION_DECODE_HANDLER *) AllocatePool (PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (EXTRACT_GUIDED_SECTION_DECODE_HANDLER));
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if (mExtractDecodeHandlerTable == NULL) {
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return RETURN_OUT_OF_RESOURCES;
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}
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mExtractGetInfoHandlerTable = (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER *) AllocatePool (PcdGet32 (PcdMaximumGuidedExtractHandler) * sizeof (EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER));
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if (mExtractGetInfoHandlerTable == NULL) {
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return RETURN_OUT_OF_RESOURCES;
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}
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//
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// the initialized number is Zero.
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//
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mNumberOfExtractHandler = 0;
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return RETURN_SUCCESS;
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}
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/**
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Get the supported exract guided section Handler guid list.
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If ExtractHandlerGuidTable = NULL, then ASSERT.
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@param[in, out] ExtractHandlerGuidTable The extract Handler guid pointer list.
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@retval 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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IN OUT GUID **ExtractHandlerGuidTable
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)
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{
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ASSERT (ExtractHandlerGuidTable != NULL);
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*ExtractHandlerGuidTable = mExtractHandlerGuidTable;
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return mNumberOfExtractHandler;
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}
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/**
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Register Guided Section Extract and GetInfo handler.
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@param[in] SectionGuid The guid matches this Extraction function.
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@param[in] GetInfoHandler Function to get info from guided section.
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@param[in] DecodeHandler Function to extract guided section.
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@retval RETURN_SUCCESS Register Guided Section Extract function successfully.
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@retval RETURN_OUT_OF_RESOURCES Resource is not enough to register new function.
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@retval RETURN_INVALID_PARAMETER Input pointer to Guid value is not valid.
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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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//
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// Check input paramter.
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//
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if (SectionGuid == NULL) {
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return RETURN_INVALID_PARAMETER;
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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 (mNumberOfExtractHandler >= 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 (&mExtractHandlerGuidTable [mNumberOfExtractHandler], SectionGuid);
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mExtractDecodeHandlerTable [mNumberOfExtractHandler] = DecodeHandler;
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mExtractGetInfoHandlerTable [mNumberOfExtractHandler++] = GetInfoHandler;
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return RETURN_SUCCESS;
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}
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/**
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Get information from the guided section. This function first gets the guid value
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from guided section header, then match this guid in the registered extract Handler list
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to its corresponding getinfo Handler.
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If not found, RETURN_UNSUPPORTED will be return.
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If found, it will call the getinfo Handler to get the required size and attribute.
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It will ASSERT () if the pointer to OutputBufferSize is NULL.
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It will ASSERT () if the pointer to ScratchBufferSize is NULL.
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It will ASSERT () if the pointer to SectionAttribute is NULL.
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@param[in] InputSection Buffer containing the input GUIDed section to be processed.
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@param[out] OutputBufferSize The size of OutputBuffer.
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@param[out] ScratchBufferSize The size of ScratchBuffer.
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@param[out] SectionAttribute The attribute of the input guided section.
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@retval RETURN_SUCCESS Get the required information successfully.
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@retval RETURN_UNSUPPORTED Guided section data is not supported.
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@retval RETURN_INVALID_PARAMETER The input data can't be parsed correctly.
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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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if (InputSection == NULL) {
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return RETURN_INVALID_PARAMETER;
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}
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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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// Search the match registered GetInfo handler for the input guided section.
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//
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for (Index = 0; Index < mNumberOfExtractHandler; Index ++) {
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if (CompareGuid (&mExtractHandlerGuidTable[Index], &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
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break;
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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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if (Index == mNumberOfExtractHandler) {
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return RETURN_UNSUPPORTED;
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}
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//
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// Call the match handler to getinfo for the input section data.
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//
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return mExtractGetInfoHandlerTable [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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Extract data from the guided section. This function first gets the guid value
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from guided section header, then match this guid in the registered extract Handler list
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to its corresponding extract Handler.
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If not found, RETURN_UNSUPPORTED will be return.
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If found, it will call this extract Handler to get output data and AuthenticationStatus.
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It will ASSERT () if the pointer to OutputBuffer is NULL.
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It will ASSERT () if the pointer to AuthenticationStatus is NULL.
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@param[in] InputSection Buffer containing the input GUIDed section to be processed.
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@param[out] OutputBuffer OutputBuffer to point the start of the section's contents
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if guided data is not required prcessing. Otherwise,
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OutputBuffer to contain the output data, which is
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allocated by the caller.
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@param[out] ScratchBuffer A pointer to a caller-allocated buffer for function internal use.
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@param[out] AuthenticationStatus
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A pointer to a caller-allocated UINT32 that indicates the
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authentication status of the output buffer.
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@retval RETURN_SUCCESS Get the output data, size and AuthenticationStatus successfully.
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@retval RETURN_UNSUPPORTED Guided section data is not supported to be decoded.
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@retval RETURN_INVALID_PARAMETER The input data can't be parsed correctly.
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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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OUT 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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if (InputSection == NULL) {
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return RETURN_INVALID_PARAMETER;
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}
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ASSERT (OutputBuffer != NULL);
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ASSERT (AuthenticationStatus != NULL);
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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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for (Index = 0; Index < mNumberOfExtractHandler; Index ++) {
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if (CompareGuid (&mExtractHandlerGuidTable[Index], &(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
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break;
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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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if (Index == mNumberOfExtractHandler) {
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return RETURN_UNSUPPORTED;
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}
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//
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// Call the match handler to getinfo for the input section data.
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//
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return mExtractDecodeHandlerTable [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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