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Add doxygen style comments for section extraction module. 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5226 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qhuang8 2008-05-20 07:26:10 +00:00
parent a432c703fe
commit 6558a83700
3 changed files with 496 additions and 334 deletions
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428
IntelFrameworkModulePkg/Universal/SectionExtractionDxe/SectionExtraction.c
View File

@ -1,4 +1,4 @@
/**@file
/** @file
Section Extraction Protocol implementation.
Stream database is implemented as a linked list of section streams,
@ -27,195 +27,19 @@
3) A support protocol is not found, and the data is not available to be read
without it. This results in EFI_PROTOCOL_ERROR.
Copyright (c) 2006, 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) 2006 - 2008, Intel Corporation. <BR>
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.
**/
#include "SectionExtraction.h"
//
// Local defines and typedefs
//
#define CORE_SECTION_CHILD_SIGNATURE EFI_SIGNATURE_32('S','X','C','S')
#define CHILD_SECTION_NODE_FROM_LINK(Node) \
CR (Node, CORE_SECTION_CHILD_NODE, Link, CORE_SECTION_CHILD_SIGNATURE)
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
UINT32 Type;
UINT32 Size;
//
// StreamBase + OffsetInStream == pointer to section header in stream. The
// stream base is always known when walking the sections within.
//
UINT32 OffsetInStream;
//
// Then EncapsulatedStreamHandle below is always 0 if the section is NOT an
// encapsulating section. Otherwise, it contains the stream handle
// of the encapsulated stream. This handle is ALWAYS produced any time an
// encapsulating child is encountered, irrespective of whether the
// encapsulated stream is processed further.
//
UINTN EncapsulatedStreamHandle;
EFI_GUID *EncapsulationGuid;
} CORE_SECTION_CHILD_NODE;
#define CORE_SECTION_STREAM_SIGNATURE EFI_SIGNATURE_32('S','X','S','S')
#define STREAM_NODE_FROM_LINK(Node) \
CR (Node, CORE_SECTION_STREAM_NODE, Link, CORE_SECTION_STREAM_SIGNATURE)
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
UINTN StreamHandle;
UINT8 *StreamBuffer;
UINTN StreamLength;
LIST_ENTRY Children;
//
// Authentication status is from GUIDed encapsulations.
//
UINT32 AuthenticationStatus;
} CORE_SECTION_STREAM_NODE;
#define NULL_STREAM_HANDLE 0
typedef struct {
CORE_SECTION_CHILD_NODE *ChildNode;
CORE_SECTION_STREAM_NODE *ParentStream;
VOID *Registration;
EFI_EVENT Event;
} RPN_EVENT_CONTEXT;
EFI_EVENT
CoreCreateProtocolNotifyEvent (
IN EFI_GUID *ProtocolGuid,
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction,
IN VOID *NotifyContext,
OUT VOID **Registration,
IN BOOLEAN SignalFlag
);
//
// Local prototypes
//
STATIC
BOOLEAN
ChildIsType (
IN CORE_SECTION_STREAM_NODE *Stream,
IN CORE_SECTION_CHILD_NODE *Child,
IN EFI_SECTION_TYPE SearchType,
IN EFI_GUID *SectionDefinitionGuid
);
STATIC
VOID
EFIAPI
NotifyGuidedExtraction (
IN EFI_EVENT Event,
IN VOID *RpnContext
);
STATIC
VOID
CreateGuidedExtractionRpnEvent (
IN CORE_SECTION_STREAM_NODE *ParentStream,
IN CORE_SECTION_CHILD_NODE *ChildNode
);
STATIC
EFI_STATUS
EFIAPI
OpenSectionStream (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN SectionStreamLength,
IN VOID *SectionStream,
OUT UINTN *SectionStreamHandle
);
STATIC
EFI_STATUS
EFIAPI
GetSection (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN SectionStreamHandle,
IN EFI_SECTION_TYPE *SectionType,
IN EFI_GUID *SectionDefinitionGuid,
IN UINTN SectionInstance,
IN VOID **Buffer,
IN OUT UINTN *BufferSize,
OUT UINT32 *AuthenticationStatus
);
STATIC
EFI_STATUS
EFIAPI
CloseSectionStream (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN StreamHandleToClose
);
STATIC
EFI_STATUS
FindStreamNode (
IN UINTN SearchHandle,
OUT CORE_SECTION_STREAM_NODE **FoundStream
);
STATIC
EFI_STATUS
FindChildNode (
IN CORE_SECTION_STREAM_NODE *SourceStream,
IN EFI_SECTION_TYPE SearchType,
IN UINTN *SectionInstance,
IN EFI_GUID *SectionDefinitionGuid,
OUT CORE_SECTION_CHILD_NODE **FoundChild,
OUT CORE_SECTION_STREAM_NODE **FoundStream,
OUT UINT32 *AuthenticationStatus
);
STATIC
EFI_STATUS
CreateChildNode (
IN CORE_SECTION_STREAM_NODE *Stream,
IN UINT32 ChildOffset,
OUT CORE_SECTION_CHILD_NODE **ChildNode
);
STATIC
VOID
FreeChildNode (
IN CORE_SECTION_CHILD_NODE *ChildNode
);
STATIC
EFI_STATUS
OpenSectionStreamEx (
IN UINTN SectionStreamLength,
IN VOID *SectionStream,
IN BOOLEAN AllocateBuffer,
IN UINT32 AuthenticationStatus,
OUT UINTN *SectionStreamHandle
);
STATIC
BOOLEAN
IsValidSectionStream (
IN VOID *SectionStream,
IN UINTN SectionStreamLength
);
//
// Module globals
//
@ -233,8 +57,8 @@ EFI_SECTION_EXTRACTION_PROTOCOL mSectionExtraction = {
Entry point of the section extraction code. Initializes an instance of the
section extraction interface and installs it on a new handle.
@param ImageHandle EFI_HANDLE: A handle for the image that is initializing this driver
@param SystemTable EFI_SYSTEM_TABLE: A pointer to the EFI system table
@param ImageHandle A handle for the image that is initializing this driver
@param SystemTable A pointer to the EFI system table
@retval EFI_SUCCESS Driver initialized successfully
@retval EFI_OUT_OF_RESOURCES Could not allocate needed resources
@ -273,13 +97,12 @@ SectionExtractionEntryPoint (
@param SectionStreamHandle A pointer to a caller allocated UINTN that on output
contains the new section stream handle.
@retval EFI_SUCCESS
@retval EFI_OUT_OF_RESOURCES memory allocation failed.
@retval EFI_INVALID_PARAMETER section stream does not end concident with end of
@retval EFI_SUCCESS Section wase opened successfully.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_INVALID_PARAMETER Section stream does not end concident with end of
last section.
**/
STATIC
EFI_STATUS
EFIAPI
OpenSectionStream (
@ -308,47 +131,46 @@ OpenSectionStream (
/**
SEP member function. Retrieves requested section from section stream.
@param This: Pointer to SEP instance.
@param SectionStreamHandle: The section stream from which to extract the requested
@param This Pointer to SEP instance.
@param SectionStreamHandle The section stream from which to extract the requested
section.
@param SectionType: A pointer to the type of section to search for.
@param SectionDefinitionGuid: If the section type is EFI_SECTION_GUID_DEFINED, then
SectionDefinitionGuid indicates which of these types
of sections to search for.
@param SectionInstance: Indicates which instance of the requested section to
@param SectionType A pointer to the type of section to search for.
@param SectionDefinitionGuid If the section type is EFI_SECTION_GUID_DEFINED, then
SectionDefinitionGuid indicates which of these types
of sections to search for.
@param SectionInstance Indicates which instance of the requested section to
return.
@param Buffer: Double indirection to buffer. If *Buffer is non-null on
@param Buffer Double indirection to buffer. If *Buffer is non-null on
input, then the buffer is caller allocated. If
*Buffer is NULL, then the buffer is callee allocated.
In either case, the requried buffer size is returned
in *BufferSize.
@param BufferSize: On input, indicates the size of *Buffer if *Buffer is
@param BufferSize On input, indicates the size of *Buffer if *Buffer is
non-null on input. On output, indicates the required
size (allocated size if callee allocated) of *Buffer.
@param AuthenticationStatus: Indicates the authentication status of the retrieved
@param AuthenticationStatus Indicates the authentication status of the retrieved
section.
@retval EFI_SUCCESS: Section was retrieved successfully
@retval EFI_PROTOCOL_ERROR: A GUID defined section was encountered in the section
stream with its EFI_GUIDED_SECTION_PROCESSING_REQUIRED
bit set, but there was no corresponding GUIDed Section
Extraction Protocol in the handle database. *Buffer is
unmodified.
@retval EFI_NOT_FOUND: An error was encountered when parsing the SectionStream.
This indicates the SectionStream is not correctly
formatted.
@retval EFI_NOT_FOUND: The requested section does not exist.
@retval EFI_OUT_OF_RESOURCES: The system has insufficient resources to process the
request.
@retval EFI_INVALID_PARAMETER: The SectionStreamHandle does not exist.
@retval EFI_WARN_TOO_SMALL: The size of the caller allocated input buffer is
insufficient to contain the requested section. The
input buffer is filled and contents are section contents
are truncated.
@retval EFI_SUCCESS Section was retrieved successfully
@retval EFI_PROTOCOL_ERROR A GUID defined section was encountered in the section
stream with its EFI_GUIDED_SECTION_PROCESSING_REQUIRED
bit set, but there was no corresponding GUIDed Section
Extraction Protocol in the handle database. *Buffer is
unmodified.
@retval EFI_NOT_FOUND An error was encountered when parsing the SectionStream.
This indicates the SectionStream is not correctly
formatted.
@retval EFI_NOT_FOUND The requested section does not exist.
@retval EFI_OUT_OF_RESOURCES The system has insufficient resources to process the
request.
@retval EFI_INVALID_PARAMETER The SectionStreamHandle does not exist.
@retval EFI_WARN_TOO_SMALL The size of the caller allocated input buffer is
insufficient to contain the requested section. The
input buffer is filled and contents are section contents
are truncated.
**/
STATIC
**/
EFI_STATUS
EFIAPI
GetSection (
@ -361,7 +183,6 @@ GetSection (
IN OUT UINTN *BufferSize,
OUT UINT32 *AuthenticationStatus
)
{
CORE_SECTION_STREAM_NODE *StreamNode;
EFI_TPL OldTpl;
@ -448,23 +269,21 @@ GetSection_Done:
/**
SEP member function. Deletes an existing section stream
@param This - Indicates the calling context.
@param StreamHandleToClose - Indicates the stream to close
@param This Indicates the calling context.
@param StreamHandleToClose Indicates the stream to close
@retval EFI_SUCCESS
@retval EFI_OUT_OF_RESOURCES - memory allocation failed.
@retval EFI_INVALID_PARAMETER - section stream does not end concident with end of
last section.
@retval EFI_SUCCESS Section stream was closed successfully.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_INVALID_PARAMETER Section stream does not end concident with end of
last section.
**/
STATIC
EFI_STATUS
EFIAPI
CloseSectionStream (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN StreamHandleToClose
)
{
CORE_SECTION_STREAM_NODE *StreamNode;
EFI_TPL OldTpl;
@ -502,17 +321,16 @@ CloseSectionStream (
/**
Worker function. Determine if the input stream:child matches the input type.
@param Stream - Indicates the section stream associated with the child
@param Child - Indicates the child to check
@param SearchType - Indicates the type of section to check against for
@param SectionDefinitionGuid - Indicates the GUID to check against if the type is
EFI_SECTION_GUID_DEFINED
@param Stream Indicates the section stream associated with the child
@param Child Indicates the child to check
@param SearchType Indicates the type of section to check against for
@param SectionDefinitionGuid Indicates the GUID to check against if the type is
EFI_SECTION_GUID_DEFINED
@retval TRUE - The child matches
@retval FALSE - The child doesn't match
@retval TRUE The child matches
@retval FALSE The child doesn't match
**/
STATIC
BOOLEAN
ChildIsType (
IN CORE_SECTION_STREAM_NODE *Stream,
@ -541,26 +359,25 @@ ChildIsType (
looking for requested section.
@param SourceStream - Indicates the section stream in which to do the search.
@param SearchType - Indicates the type of section to search for.
@param SectionInstance - Indicates which instance of section to find. This is
an in/out parameter to deal with recursions.
@param SectionDefinitionGuid - Guid of section definition
@param FoundChild - Output indicating the child node that is found.
@param FoundStream - Output indicating which section stream the child was
found in. If this stream was generated as a result of
an encapsulation section, the streamhandle is visible
within the SEP driver only.
@param AuthenticationStatus- Indicates the authentication status of the found section.
@param SourceStream Indicates the section stream in which to do the search.
@param SearchType Indicates the type of section to search for.
@param SectionInstance Indicates which instance of section to find. This is
an in/out parameter to deal with recursions.
@param SectionDefinitionGuid Guid of section definition
@param FoundChild Output indicating the child node that is found.
@param FoundStream Output indicating which section stream the child was
found in. If this stream was generated as a result of
an encapsulation section, the streamhandle is visible
within the SEP driver only.
@param AuthenticationStatus Indicates the authentication status of the found section.
@retval EFI_SUCCESS - Child node was found and returned.
@retval EFI_OUT_OF_RESOURCES- Memory allocation failed.
@retval EFI_NOT_FOUND - Requested child node does not exist.
@retval EFI_PROTOCOL_ERROR - a required GUIDED section extraction protocol does not
exist
@retval EFI_SUCCESS Child node was found and returned.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_NOT_FOUND Requested child node does not exist.
@retval EFI_PROTOCOL_ERROR A required GUIDED section extraction protocol does not
exist
**/
STATIC
EFI_STATUS
FindChildNode (
IN CORE_SECTION_STREAM_NODE *SourceStream,
@ -571,7 +388,6 @@ FindChildNode (
OUT CORE_SECTION_STREAM_NODE **FoundStream,
OUT UINT32 *AuthenticationStatus
)
{
CORE_SECTION_CHILD_NODE *CurrentChildNode;
CORE_SECTION_CHILD_NODE *RecursedChildNode;
@ -691,22 +507,21 @@ FindChildNode (
/**
Worker function. Constructor for new child nodes.
@param Stream - Indicates the section stream in which to add the child.
@param ChildOffset - Indicates the offset in Stream that is the beginning
of the child section.
@param ChildNode - Indicates the Callee allocated and initialized child.
@param Stream Indicates the section stream in which to add the child.
@param ChildOffset Indicates the offset in Stream that is the beginning
of the child section.
@param ChildNode Indicates the Callee allocated and initialized child.
@retval EFI_SUCCESS - Child node was found and returned.
@retval EFI_OUT_OF_RESOURCES- Memory allocation failed.
@retval EFI_PROTOCOL_ERROR - Encapsulation sections produce new stream handles when
the child node is created. If the section type is GUID
defined, and the extraction GUID does not exist, and
producing the stream requires the GUID, then a protocol
error is generated and no child is produced.
Values returned by OpenSectionStreamEx.
@retval EFI_SUCCESS Child node was found and returned.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_PROTOCOL_ERROR Encapsulation sections produce new stream handles when
the child node is created. If the section type is GUID
defined, and the extraction GUID does not exist, and
producing the stream requires the GUID, then a protocol
error is generated and no child is produced.
Values returned by OpenSectionStreamEx.
**/
STATIC
EFI_STATUS
CreateChildNode (
IN CORE_SECTION_STREAM_NODE *Stream,
@ -969,11 +784,10 @@ CreateChildNode (
Worker function. Constructor for RPN event if needed to keep AuthenticationStatus
cache correct when a missing GUIDED_SECTION_EXTRACTION_PROTOCOL appears...
@param ParentStream - Indicates the parent of the ecnapsulation section (child)
@param ChildNode - Indicates the child node that is the encapsulation section.
@param ParentStream Indicates the parent of the ecnapsulation section (child)
@param ChildNode Indicates the child node that is the encapsulation section.
**/
STATIC
VOID
CreateGuidedExtractionRpnEvent (
IN CORE_SECTION_STREAM_NODE *ParentStream,
@ -1005,12 +819,11 @@ CreateGuidedExtractionRpnEvent (
RPN callback function. Removes a stale section stream and re-initializes it
with an updated AuthenticationStatus.
@param Event - The event that fired
@param RpnContext - A pointer to the context that allows us to identify
the relevent encapsulation...
@param Event The event that fired
@param RpnContext A pointer to the context that allows us to identify
the relevent encapsulation.
**/
STATIC
**/
VOID
EFIAPI
NotifyGuidedExtraction (
@ -1077,15 +890,13 @@ NotifyGuidedExtraction (
/**
Worker function. Destructor for child nodes.
@param ChildNode - Indicates the node to destroy
@param ChildNode Indicates the node to destroy
**/
STATIC
VOID
FreeChildNode (
IN CORE_SECTION_CHILD_NODE *ChildNode
)
{
ASSERT (ChildNode->Signature == CORE_SECTION_CHILD_SIGNATURE);
//
@ -1109,20 +920,18 @@ FreeChildNode (
/**
Worker function. Constructor for section streams.
@param SectionStreamLength - Size in bytes of the section stream.
@param SectionStream - Buffer containing the new section stream.
@param AllocateBuffer - Indicates whether the stream buffer is to be copied
or the input buffer is to be used in place.
@param AuthenticationStatus- Indicates the default authentication status for the
new stream.
@param SectionStreamHandle - A pointer to a caller allocated section stream handle.
@param SectionStreamLength Size in bytes of the section stream.
@param SectionStream Buffer containing the new section stream.
@param AllocateBuffer Indicates whether the stream buffer is to be copied
or the input buffer is to be used in place.
@param AuthenticationStatus Indicates the default authentication status for the
new stream.
@param SectionStreamHandle A pointer to a caller allocated section stream handle.
@retval EFI_SUCCESS - Stream was added to stream database.
@retval EFI_OUT_OF_RESOURCES - memory allocation failed.
@retval EFI_SUCCESS Stream was added to stream database.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
**/
STATIC
EFI_STATUS
OpenSectionStreamEx (
IN UINTN SectionStreamLength,
@ -1131,7 +940,6 @@ OpenSectionStreamEx (
IN UINT32 AuthenticationStatus,
OUT UINTN *SectionStreamHandle
)
{
CORE_SECTION_STREAM_NODE *NewStream;
EFI_TPL OldTpl;
@ -1198,21 +1006,19 @@ OpenSectionStreamEx (
/**
Worker function. Search stream database for requested stream handle.
@param SearchHandle - Indicates which stream to look for.
@param FoundStream - Output pointer to the found stream.
@param SearchHandle Indicates which stream to look for.
@param FoundStream Output pointer to the found stream.
@retval EFI_SUCCESS - StreamHandle was found and *FoundStream contains
the stream node.
@retval EFI_NOT_FOUND - SearchHandle was not found in the stream database.
@retval EFI_SUCCESS StreamHandle was found and *FoundStream contains
the stream node.
@retval EFI_NOT_FOUND SearchHandle was not found in the stream database.
**/
STATIC
EFI_STATUS
FindStreamNode (
IN UINTN SearchHandle,
OUT CORE_SECTION_STREAM_NODE **FoundStream
)
{
CORE_SECTION_STREAM_NODE *StreamNode;
@ -1237,18 +1043,17 @@ FindStreamNode (
Check if a stream is valid.
@param SectionStream - The section stream to be checked
@param SectionStreamLength - The length of section stream
@param SectionStream The section stream to be checked
@param SectionStreamLength The length of section stream
@return The validness of a stream.
@return if a stream is valid.
**/
STATIC
BOOLEAN
IsValidSectionStream (
IN VOID *SectionStream,
IN UINTN SectionStreamLength
)
{
UINTN TotalLength;
UINTN SectionLength;
@ -1287,19 +1092,14 @@ IsValidSectionStream (
/**
Create a protocol notification event and return it.
@param ProtocolGuid - Protocol to register notification event on.
@param ProtocolGuid Protocol to register notification event on.
@param NotifyTpl Maximum TPL to signal the NotifyFunction.
@param NotifyFunction EFI notification routine.
@param NotifyContext Context passed into Event when it is created.
@param Registration Registration key returned from RegisterProtocolNotify().
@param SignalFlag Boolean value to decide whether kick the event after register or not.
@param NotifyTpl - Maximum TPL to signal the NotifyFunction.
@param NotifyFuncition - EFI notification routine.
@param NotifyContext - Context passed into Event when it is created.
@param Registration - Registration key returned from RegisterProtocolNotify().
@param SignalFlag - Boolean value to decide whether kick the event after register or not.
@return The EFI_EVENT that has been registered to be signaled when a ProtocolGuid
@return The EFI_EVENT that has been registered to be signaled when a ProtocolGuid
is added to the system.
**/

382
IntelFrameworkModulePkg/Universal/SectionExtractionDxe/SectionExtraction.h
View File

@ -1,4 +1,4 @@
/**@file
/** @file
Section Extraction Protocol implementation.
Stream database is implemented as a linked list of section streams,
@ -26,15 +26,15 @@
3) A support protocol is not found, and the data is not available to be read
without it. This results in EFI_PROTOCOL_ERROR.
Copyright (c) 2006, 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) 2006 - 2008, Intel Corporation. <BR>
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.
**/
@ -54,4 +54,366 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Protocol/Decompress.h>
#include <Protocol/GuidedSectionExtraction.h>
//
// Local defines and typedefs
//
#define CORE_SECTION_CHILD_SIGNATURE EFI_SIGNATURE_32('S','X','C','S')
#define CHILD_SECTION_NODE_FROM_LINK(Node) \
CR (Node, CORE_SECTION_CHILD_NODE, Link, CORE_SECTION_CHILD_SIGNATURE)
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
UINT32 Type;
UINT32 Size;
//
// StreamBase + OffsetInStream == pointer to section header in stream. The
// stream base is always known when walking the sections within.
//
UINT32 OffsetInStream;
//
// Then EncapsulatedStreamHandle below is always 0 if the section is NOT an
// encapsulating section. Otherwise, it contains the stream handle
// of the encapsulated stream. This handle is ALWAYS produced any time an
// encapsulating child is encountered, irrespective of whether the
// encapsulated stream is processed further.
//
UINTN EncapsulatedStreamHandle;
EFI_GUID *EncapsulationGuid;
} CORE_SECTION_CHILD_NODE;
#define CORE_SECTION_STREAM_SIGNATURE EFI_SIGNATURE_32('S','X','S','S')
#define STREAM_NODE_FROM_LINK(Node) \
CR (Node, CORE_SECTION_STREAM_NODE, Link, CORE_SECTION_STREAM_SIGNATURE)
typedef struct {
UINT32 Signature;
LIST_ENTRY Link;
UINTN StreamHandle;
UINT8 *StreamBuffer;
UINTN StreamLength;
LIST_ENTRY Children;
//
// Authentication status is from GUIDed encapsulations.
//
UINT32 AuthenticationStatus;
} CORE_SECTION_STREAM_NODE;
#define NULL_STREAM_HANDLE 0
typedef struct {
CORE_SECTION_CHILD_NODE *ChildNode;
CORE_SECTION_STREAM_NODE *ParentStream;
VOID *Registration;
EFI_EVENT Event;
} RPN_EVENT_CONTEXT;
/**
Create a protocol notification event and return it.
@param ProtocolGuid Protocol to register notification event on.
@param NotifyTpl Maximum TPL to signal the NotifyFunction.
@param NotifyFunction EFI notification routine.
@param NotifyContext Context passed into Event when it is created.
@param Registration Registration key returned from RegisterProtocolNotify().
@param SignalFlag Boolean value to decide whether kick the event after register or not.
@return The EFI_EVENT that has been registered to be signaled when a ProtocolGuid
is added to the system.
**/
EFI_EVENT
CoreCreateProtocolNotifyEvent (
IN EFI_GUID *ProtocolGuid,
IN EFI_TPL NotifyTpl,
IN EFI_EVENT_NOTIFY NotifyFunction,
IN VOID *NotifyContext,
OUT VOID **Registration,
IN BOOLEAN SignalFlag
);
//
// Local prototypes
//
/**
Worker function. Determine if the input stream:child matches the input type.
@param Stream Indicates the section stream associated with the child
@param Child Indicates the child to check
@param SearchType Indicates the type of section to check against for
@param SectionDefinitionGuid Indicates the GUID to check against if the type is
EFI_SECTION_GUID_DEFINED
@retval TRUE The child matches
@retval FALSE The child doesn't match
**/
BOOLEAN
ChildIsType (
IN CORE_SECTION_STREAM_NODE *Stream,
IN CORE_SECTION_CHILD_NODE *Child,
IN EFI_SECTION_TYPE SearchType,
IN EFI_GUID *SectionDefinitionGuid
);
/**
RPN callback function. Removes a stale section stream and re-initializes it
with an updated AuthenticationStatus.
@param Event The event that fired
@param RpnContext A pointer to the context that allows us to identify
the relevent encapsulation.
**/
VOID
EFIAPI
NotifyGuidedExtraction (
IN EFI_EVENT Event,
IN VOID *RpnContext
);
/**
Worker function. Constructor for RPN event if needed to keep AuthenticationStatus
cache correct when a missing GUIDED_SECTION_EXTRACTION_PROTOCOL appears...
@param ParentStream Indicates the parent of the ecnapsulation section (child)
@param ChildNode Indicates the child node that is the encapsulation section.
**/
VOID
CreateGuidedExtractionRpnEvent (
IN CORE_SECTION_STREAM_NODE *ParentStream,
IN CORE_SECTION_CHILD_NODE *ChildNode
);
/**
SEP member function. This function creates and returns a new section stream
handle to represent the new section stream.
@param This Indicates the calling context.
@param SectionStreamLength Size in bytes of the section stream.
@param SectionStream Buffer containing the new section stream.
@param SectionStreamHandle A pointer to a caller allocated UINTN that on output
contains the new section stream handle.
@retval EFI_SUCCESS Section wase opened successfully.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_INVALID_PARAMETER Section stream does not end concident with end of
last section.
**/
EFI_STATUS
EFIAPI
OpenSectionStream (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN SectionStreamLength,
IN VOID *SectionStream,
OUT UINTN *SectionStreamHandle
);
/**
SEP member function. Retrieves requested section from section stream.
@param This Pointer to SEP instance.
@param SectionStreamHandle The section stream from which to extract the requested
section.
@param SectionType A pointer to the type of section to search for.
@param SectionDefinitionGuid If the section type is EFI_SECTION_GUID_DEFINED, then
SectionDefinitionGuid indicates which of these types
of sections to search for.
@param SectionInstance Indicates which instance of the requested section to
return.
@param Buffer Double indirection to buffer. If *Buffer is non-null on
input, then the buffer is caller allocated. If
*Buffer is NULL, then the buffer is callee allocated.
In either case, the requried buffer size is returned
in *BufferSize.
@param BufferSize On input, indicates the size of *Buffer if *Buffer is
non-null on input. On output, indicates the required
size (allocated size if callee allocated) of *Buffer.
@param AuthenticationStatus Indicates the authentication status of the retrieved
section.
@retval EFI_SUCCESS Section was retrieved successfully
@retval EFI_PROTOCOL_ERROR A GUID defined section was encountered in the section
stream with its EFI_GUIDED_SECTION_PROCESSING_REQUIRED
bit set, but there was no corresponding GUIDed Section
Extraction Protocol in the handle database. *Buffer is
unmodified.
@retval EFI_NOT_FOUND An error was encountered when parsing the SectionStream.
This indicates the SectionStream is not correctly
formatted.
@retval EFI_NOT_FOUND The requested section does not exist.
@retval EFI_OUT_OF_RESOURCES The system has insufficient resources to process the
request.
@retval EFI_INVALID_PARAMETER The SectionStreamHandle does not exist.
@retval EFI_WARN_TOO_SMALL The size of the caller allocated input buffer is
insufficient to contain the requested section. The
input buffer is filled and contents are section contents
are truncated.
**/
EFI_STATUS
EFIAPI
GetSection (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN SectionStreamHandle,
IN EFI_SECTION_TYPE *SectionType,
IN EFI_GUID *SectionDefinitionGuid,
IN UINTN SectionInstance,
IN VOID **Buffer,
IN OUT UINTN *BufferSize,
OUT UINT32 *AuthenticationStatus
);
/**
SEP member function. Deletes an existing section stream
@param This Indicates the calling context.
@param StreamHandleToClose Indicates the stream to close
@retval EFI_SUCCESS Section stream was closed successfully.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_INVALID_PARAMETER Section stream does not end concident with end of
last section.
**/
EFI_STATUS
EFIAPI
CloseSectionStream (
IN EFI_SECTION_EXTRACTION_PROTOCOL *This,
IN UINTN StreamHandleToClose
);
/**
Worker function. Search stream database for requested stream handle.
@param SearchHandle Indicates which stream to look for.
@param FoundStream Output pointer to the found stream.
@retval EFI_SUCCESS StreamHandle was found and *FoundStream contains
the stream node.
@retval EFI_NOT_FOUND SearchHandle was not found in the stream database.
**/
EFI_STATUS
FindStreamNode (
IN UINTN SearchHandle,
OUT CORE_SECTION_STREAM_NODE **FoundStream
);
/**
Worker function Recursively searches / builds section stream database
looking for requested section.
@param SourceStream Indicates the section stream in which to do the search.
@param SearchType Indicates the type of section to search for.
@param SectionInstance Indicates which instance of section to find. This is
an in/out parameter to deal with recursions.
@param SectionDefinitionGuid Guid of section definition
@param FoundChild Output indicating the child node that is found.
@param FoundStream Output indicating which section stream the child was
found in. If this stream was generated as a result of
an encapsulation section, the streamhandle is visible
within the SEP driver only.
@param AuthenticationStatus Indicates the authentication status of the found section.
@retval EFI_SUCCESS Child node was found and returned.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_NOT_FOUND Requested child node does not exist.
@retval EFI_PROTOCOL_ERROR A required GUIDED section extraction protocol does not
exist
**/
EFI_STATUS
FindChildNode (
IN CORE_SECTION_STREAM_NODE *SourceStream,
IN EFI_SECTION_TYPE SearchType,
IN OUT UINTN *SectionInstance,
IN EFI_GUID *SectionDefinitionGuid,
OUT CORE_SECTION_CHILD_NODE **FoundChild,
OUT CORE_SECTION_STREAM_NODE **FoundStream,
OUT UINT32 *AuthenticationStatus
);
/**
Worker function. Constructor for new child nodes.
@param Stream Indicates the section stream in which to add the child.
@param ChildOffset Indicates the offset in Stream that is the beginning
of the child section.
@param ChildNode Indicates the Callee allocated and initialized child.
@retval EFI_SUCCESS Child node was found and returned.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
@retval EFI_PROTOCOL_ERROR Encapsulation sections produce new stream handles when
the child node is created. If the section type is GUID
defined, and the extraction GUID does not exist, and
producing the stream requires the GUID, then a protocol
error is generated and no child is produced.
Values returned by OpenSectionStreamEx.
**/
EFI_STATUS
CreateChildNode (
IN CORE_SECTION_STREAM_NODE *Stream,
IN UINT32 ChildOffset,
OUT CORE_SECTION_CHILD_NODE **ChildNode
);
/**
Worker function. Destructor for child nodes.
@param ChildNode Indicates the node to destroy
**/
VOID
FreeChildNode (
IN CORE_SECTION_CHILD_NODE *ChildNode
);
/**
Worker function. Constructor for section streams.
@param SectionStreamLength Size in bytes of the section stream.
@param SectionStream Buffer containing the new section stream.
@param AllocateBuffer Indicates whether the stream buffer is to be copied
or the input buffer is to be used in place.
@param AuthenticationStatus Indicates the default authentication status for the
new stream.
@param SectionStreamHandle A pointer to a caller allocated section stream handle.
@retval EFI_SUCCESS Stream was added to stream database.
@retval EFI_OUT_OF_RESOURCES Memory allocation failed.
**/
EFI_STATUS
OpenSectionStreamEx (
IN UINTN SectionStreamLength,
IN VOID *SectionStream,
IN BOOLEAN AllocateBuffer,
IN UINT32 AuthenticationStatus,
OUT UINTN *SectionStreamHandle
);
/**
Check if a stream is valid.
@param SectionStream The section stream to be checked
@param SectionStreamLength The length of section stream
@return The validness of a stream.
**/
BOOLEAN
IsValidSectionStream (
IN VOID *SectionStream,
IN UINTN SectionStreamLength
);
#endif // _SECTION_EXTRACTION_H_

20
IntelFrameworkModulePkg/Universal/SectionExtractionDxe/SectionExtractionDxe.inf
View File

@ -1,19 +1,19 @@
#/** @file
# Section Extraction Dxe Driver.
#
# Status Code Architectural Protocol implementation as defined in Tiano
# Architecture Specification. This driver has limited functionality
# at runtime and will not log to Data Hub at runtime.
# Copyright (c) 2006, Intel Corporation.
#
#
# Section Extraction Dxe Driver.
#
# Section Extraction Protocol implementation as defined in Intel Framework
# Specification.
#
# Copyright (c) 2006 - 2008, Intel Corporation. <BR>
# 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
# 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.
#
#
#
#**/
[Defines]