GuidedSectionExtraction.c File Reference

#include "LzmaDecompressLibInternal.h"

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Functions
RETURN_STATUS EFIAPI	LzmaGuidedSectionGetInfo (IN CONST VOID *InputSection, OUT UINT32 *OutputBufferSize, OUT UINT32 *ScratchBufferSize, OUT UINT16 *SectionAttribute)
RETURN_STATUS EFIAPI	LzmaGuidedSectionExtraction (IN CONST VOID *InputSection, OUT VOID **OutputBuffer, OUT VOID *ScratchBuffer OPTIONAL, OUT UINT32 *AuthenticationStatus)
EFI_STATUS EFIAPI	LzmaDecompressLibConstructor (VOID)

Detailed Description

LZMA Decompress GUIDed Section Extraction Library. It wraps Lzma decompress interfaces to GUIDed Section Extraction interfaces and registers them into GUIDed handler table.

Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file GuidedSectionExtraction.c.

Function Documentation

LzmaDecompressLibConstructor()

EFI_STATUS EFIAPI LzmaDecompressLibConstructor

(

VOID

)

Register LzmaDecompress and LzmaDecompressGetInfo handlers with LzmaCustomerDecompressGuid.

Return values

RETURN_SUCCESS	Register successfully.
RETURN_OUT_OF_RESOURCES	No enough memory to store this handler.

Definition at line 193 of file GuidedSectionExtraction.c.

LzmaGuidedSectionExtraction()

RETURN_STATUS EFIAPI LzmaGuidedSectionExtraction	(	IN CONST VOID *	InputSection,
		OUT VOID **	OutputBuffer,
		OUT VOID *ScratchBuffer	OPTIONAL,
		OUT UINT32 *	AuthenticationStatus
	)

Decompress a LZAM compressed GUIDed section into a caller allocated output buffer.

Decodes the GUIDed section specified by InputSection. If GUID for InputSection does not match the GUID that this handler supports, then RETURN_UNSUPPORTED is returned. If the data in InputSection can not be decoded, then RETURN_INVALID_PARAMETER is returned. If the GUID of InputSection does match the GUID that this handler supports, then InputSection is decoded 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.

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().

Parameters

[in]	InputSection	A pointer to a GUIDed section of an FFS formatted file.
[out]	OutputBuffer	A pointer to a buffer that contains the result of a decode operation.
[out]	ScratchBuffer	A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation.
[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. EFI_AUTH_STATUS_PLATFORM_OVERRIDE must never be set by this handler.

Return values

RETURN_SUCCESS	The buffer specified by InputSection was decoded.
RETURN_UNSUPPORTED	The section specified by InputSection does not match the GUID this handler supports.
RETURN_INVALID_PARAMETER	The section specified by InputSection can not be decoded.

Definition at line 132 of file GuidedSectionExtraction.c.

LzmaGuidedSectionGetInfo()

RETURN_STATUS EFIAPI LzmaGuidedSectionGetInfo	(	IN CONST VOID *	InputSection,
		OUT UINT32 *	OutputBufferSize,
		OUT UINT32 *	ScratchBufferSize,
		OUT UINT16 *	SectionAttribute
	)

Examines a GUIDed section and returns the size of the decoded buffer and the size of an 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 the GUID that this handler supports, then RETURN_UNSUPPORTED is returned. If the required information can not be retrieved from InputSection, then RETURN_INVALID_PARAMETER is returned. If the GUID of InputSection does match the GUID that this handler supports, then the size required to hold the decoded buffer is returned in OututBufferSize, the size of an optional scratch buffer is returned in ScratchSize, and the Attributes field from EFI_GUID_DEFINED_SECTION header of InputSection is returned in SectionAttribute.

If InputSection is NULL, then ASSERT(). If OutputBufferSize is NULL, then ASSERT(). If ScratchBufferSize is NULL, then ASSERT(). If SectionAttribute is NULL, then ASSERT().

Parameters

[in]	InputSection	A pointer to a GUIDed section of an FFS formatted file.
[out]	OutputBufferSize	A pointer to the size, in bytes, of an output buffer required if the buffer specified by InputSection were decoded.
[out]	ScratchBufferSize	A pointer to the size, in bytes, required as scratch space if the buffer specified by InputSection were decoded.
[out]	SectionAttribute	A pointer to the attributes of the GUIDed section. See the Attributes field of EFI_GUID_DEFINED_SECTION in the PI Specification.

Return values

RETURN_SUCCESS	The information about InputSection was returned.
RETURN_UNSUPPORTED	The section specified by InputSection does not match the GUID this handler supports.
RETURN_INVALID_PARAMETER	The information can not be retrieved from the section specified by InputSection.

Definition at line 48 of file GuidedSectionExtraction.c.