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Code Scrub: Code has been checked with MDE spec 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6606 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jji4 2008-11-18 11:33:48 +00:00
parent 9a737ffeab
commit f1db45f81a
3 changed files with 319 additions and 181 deletions
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203
MdePkg/Include/Library/ExtractGuidedSectionLib.h
View File

@ -15,18 +15,35 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define __EXTRACT_GUIDED_SECTION_H__ #define __EXTRACT_GUIDED_SECTION_H__
/** /**
Get information for the input guided section data. Examines a GUIDed section and returns the size of the decoded buffer and the
It will ASSERT () if the pointer to OutputBufferSize is NULL. size of an optional scratch buffer required to actually decode the data in a GUIDed section.
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. Examines a GUIDed section specified by InputSection.
@param[out] OutputBufferSize The size of OutputBuffer. If GUID for InputSection does not match the GUID that this handler supports,
@param[out] ScratchBufferSize The size of ScratchBuffer. then RETURN_UNSUPPORTED is returned.
@param[out] SectionAttribute The attribute of the input guided section. 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().
@retval RETURN_SUCCESS Get the required information successfully.
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. @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 The information about InputSection was returned.
@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The information can not be retrieved from the section specified by InputSection.
**/ **/
typedef typedef
@ -39,21 +56,35 @@ RETURN_STATUS
); );
/** /**
Extract data and Auth from the specific guided section. Decodes a GUIDed section into a caller allocated output buffer.
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. Decodes the GUIDed section specified by InputSection.
@param[out] OutputBuffer OutputBuffer directly points to the start of the section's contents, If GUID for InputSection does not match the GUID that this handler supports, then RETURN_UNSUPPORTED is returned.
if guided data is not prcessed. Otherwise, If the data in InputSection can not be decoded, then RETURN_INVALID_PARAMETER is returned.
OutputBuffer contains the output data, which is allocated by the caller. If the GUID of InputSection does match the GUID that this handler supports, then InputSection
@param[out] ScratchBuffer A pointer to a caller-allocated buffer for function internal use. 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().
@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[out] ScratchBuffer A caller allocated buffer that may be required by this function
as a scratch buffer to perform the decode operation.
@param[out] AuthenticationStatus @param[out] AuthenticationStatus
A pointer to a caller-allocated UINT32 that indicates the A pointer to the authentication status of the decoded output buffer.
authentication status of the 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.
@retval RETURN_SUCCESS Get the output data and AuthenticationStatus successfully. @retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. @retval RETURN_UNSPPORTED 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.
**/ **/
typedef typedef
@ -66,15 +97,27 @@ RETURN_STATUS
); );
/** /**
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.
@param[in] SectionGuid The guid matches this Extraction Handler. Registers the handlers specified by GetInfoHandler and DecodeHandler witg the GUID specified by SectionGuid.
@param[in] GetInfoHandler Handler to get information from guided section. If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED.
@param[in] DecodeHandler Handler to extract guided section. 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().
@retval RETURN_SUCCESS Register Guided Section Extract Handler successfully. @param[in] SectionGuid A pointer to the GUID associated with the the handlers
@retval RETURN_OUT_OF_RESOURCES Resource is not enough to register new Handler. of the GUIDed section type being registered.
@retval RETURN_INVALID_PARAMETER Pointer to Guid value is not valid. @param[in] 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.
@param[in] DecodeHandler Pointer to a function that decodes a GUIDed section into a caller
allocated output buffer.
@retval RETURN_SUCCESS The handlers were registered.
@retval RETURN_ALREADY_STARTED Handlers have already been registered for the GUID specified by SectionGuid.
@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers.
**/ **/
RETURN_STATUS RETURN_STATUS
@ -86,14 +129,18 @@ ExtractGuidedSectionRegisterHandlers (
); );
/** /**
Get the supported exract guided section Handler guid table, which is maintained Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers().
by library. The caller can directly get the guid table
without responsibility to allocate or free this table buffer.
It will ASSERT () if ExtractHandlerGuidTable = NULL.
@param[out] ExtractHandlerGuidTable The extract Handler guid pointer list. 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 A pointer to the array of GUIDs tht have been registerd through
ExtractGuidedSectionRegisterHandlers().
@return the number of the supported extract guided Handler. @return the number of the supported extract guided Handler.
**/ **/
UINTN UINTN
EFIAPI EFIAPI
@ -102,24 +149,36 @@ ExtractGuidedSectionGetGuidList (
); );
/** /**
Get information from the guided section. This function first gets the guid value Retrives a GUID from a GUIDed section and uses that GUID to select an associated handler of type
from guided section header, then match this guid in the registered extract Handler list EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
to its corresponding getinfo Handler. The selected handler is used to retrieve and return the size of the decoded buffer and the size of an
If not found, RETURN_UNSUPPORTED will be return. optional scratch buffer required to actually decode the data in a GUIDed section.
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. Examines a GUIDed section specified by InputSection.
It will ASSERT () if the pointer to ScratchBufferSize is NULL. If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
It will ASSERT () if the pointer to SectionAttribute is NULL. 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 Buffer containing the input GUIDed section to be processed. @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBufferSize The size of OutputBuffer. @param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer
@param[out] ScratchBufferSize The size of ScratchBuffer. specified by InputSection were decoded.
@param[out] SectionAttribute The attribute of the input guided section. @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_SUCCESS Get the required information successfully.
@retval RETURN_UNSUPPORTED Guided section data is not supported. @retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. 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 RETURN_STATUS
@ -132,35 +191,45 @@ ExtractGuidedSectionGetInfo (
); );
/** /**
Extract data from the guided section. This function first gets the guid value Retrives the GUID from a GUIDed section and uses that GUID to select an associated handler of type
from guided section header, then match this guid in the registered extract Handler list EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
to its corresponding extract Handler. The selected handler is used to decode the data in a GUIDed section and return the result in a caller
If not found, RETURN_UNSUPPORTED will be return. allocated output buffer.
If found, it will call this extract Handler to get output data and AuthenticationStatus.
It will ASSERT () if the pointer to OutputBuffer is NULL. Decodes the GUIDed section specified by InputSection.
It will ASSERT () if the pointer to AuthenticationStatus is NULL. 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 Buffer containing the input GUIDed section to be processed. @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBuffer OutputBuffer to point the start of the section's contents @param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
if guided data is not required prcessing. Otherwise, @param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation.
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 @param[out] AuthenticationStatus
A pointer to a caller-allocated UINT32 that indicates the A pointer to the authentication status of the decoded output buffer. See the definition
authentication status of the output buffer. 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.
@retval RETURN_SUCCESS Get the output data 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.
**/ **/
RETURN_STATUS RETURN_STATUS
EFIAPI EFIAPI
ExtractGuidedSectionDecode ( ExtractGuidedSectionDecode (
IN CONST VOID *InputSection, IN CONST VOID *InputSection,
OUT VOID **OutputBuffer, OUT VOID **OutputBuffer,
OUT VOID *ScratchBuffer, OPTIONAL IN VOID *ScratchBuffer, OPTIONAL
OUT UINT32 *AuthenticationStatus OUT UINT32 *AuthenticationStatus
); );

144
MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.c
View File

@ -67,14 +67,18 @@ DxeExtractGuidedSectionLibConstructor (
} }
/** /**
Get the supported exract guided section Handler guid table, which is maintained Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers().
by library. The caller can directly get the guid table
without responsibility to allocate or free this table buffer.
It will ASSERT () if ExtractHandlerGuidTable = NULL.
@param[out] ExtractHandlerGuidTable The extract Handler guid pointer list. 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 A pointer to the array of GUIDs tht have been registerd through
ExtractGuidedSectionRegisterHandlers().
@return the number of the supported extract guided Handler. @return the number of the supported extract guided Handler.
**/ **/
UINTN UINTN
EFIAPI EFIAPI
@ -89,15 +93,28 @@ ExtractGuidedSectionGetGuidList (
} }
/** /**
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.
@param[in] SectionGuid The guid matches this Extraction function. Registers the handlers specified by GetInfoHandler and DecodeHandler witg the GUID specified by SectionGuid.
@param[in] GetInfoHandler Function to get info from guided section. If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED.
@param[in] DecodeHandler Function to extract guided section. 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 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 Pointer to a function that decodes a GUIDed section into a caller
allocated output buffer.
@retval RETURN_SUCCESS The handlers were registered.
@retval RETURN_ALREADY_STARTED Handlers have already been registered for the GUID specified by SectionGuid.
@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers.
@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 RETURN_STATUS
EFIAPI EFIAPI
@ -111,9 +128,9 @@ ExtractGuidedSectionRegisterHandlers (
// //
// Check input paramter. // Check input paramter.
// //
if (SectionGuid == NULL) { ASSERT (SectionGuid != NULL);
return RETURN_INVALID_PARAMETER; ASSERT (GetInfoHandler != NULL);
} ASSERT (DecodeHandler != NULL);
// //
// Search the match registered GetInfo handler for the input guided section. // Search the match registered GetInfo handler for the input guided section.
@ -147,24 +164,36 @@ ExtractGuidedSectionRegisterHandlers (
} }
/** /**
Get information from the guided section. This function first gets the guid value Retrives a GUID from a GUIDed section and uses that GUID to select an associated handler of type
from guided section header, then match this guid in the registered extract Handler list EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
to its corresponding getinfo Handler. The selected handler is used to retrieve and return the size of the decoded buffer and the size of an
If not found, RETURN_INVALID_PARAMETER will be return. optional scratch buffer required to actually decode the data in a GUIDed section.
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. Examines a GUIDed section specified by InputSection.
It will ASSERT () if the pointer to ScratchBufferSize is NULL. If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
It will ASSERT () if the pointer to SectionAttribute is NULL. 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 Buffer containing the input GUIDed section to be processed. @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBufferSize The size of OutputBuffer. @param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer
@param[out] ScratchBufferSize The size of ScratchBuffer. specified by InputSection were decoded.
@param[out] SectionAttribute The attribute of the input guided section. @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_SUCCESS Get the required information successfully.
@retval RETURN_UNSUPPORTED Guided section data is not supported. @retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. 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 RETURN_STATUS
@ -178,10 +207,7 @@ ExtractGuidedSectionGetInfo (
{ {
UINT32 Index; UINT32 Index;
if (InputSection == NULL) { ASSERT (InputSection != NULL);
return RETURN_INVALID_PARAMETER;
}
ASSERT (OutputBufferSize != NULL); ASSERT (OutputBufferSize != NULL);
ASSERT (ScratchBufferSize != NULL); ASSERT (ScratchBufferSize != NULL);
ASSERT (SectionAttribute != NULL); ASSERT (SectionAttribute != NULL);
@ -210,28 +236,37 @@ ExtractGuidedSectionGetInfo (
} }
/** /**
Extract data from the guided section. This function first gets the guid value Retrives the GUID from a GUIDed section and uses that GUID to select an associated handler of type
from guided section header, then match this guid in the registered extract Handler list EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
to its corresponding extract Handler. The selected handler is used to decode the data in a GUIDed section and return the result in a caller
If not found, RETURN_INVALID_PARAMETER will be return. allocated output buffer.
If found, it will call this extract Handler to get output data and AuthenticationStatus.
It will ASSERT () if the pointer to OutputBuffer is NULL. Decodes the GUIDed section specified by InputSection.
It will ASSERT () if the pointer to AuthenticationStatus is NULL. 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 Buffer containing the input GUIDed section to be processed. @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBuffer OutputBuffer to point the start of the section's contents @param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
if guided data is not required prcessing. Otherwise, @param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation.
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 @param[out] AuthenticationStatus
A pointer to a caller-allocated UINT32 that indicates the A pointer to the authentication status of the decoded output buffer. See the definition
authentication status of the output buffer. of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI section of the PI
Specification.
@retval RETURN_SUCCESS Get the output data and AuthenticationStatus successfully. @retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
@retval RETURN_UNSUPPORTED Guided section data is not supported to be decoded. @retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. @retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
**/ **/
RETURN_STATUS RETURN_STATUS
@ -239,7 +274,7 @@ EFIAPI
ExtractGuidedSectionDecode ( ExtractGuidedSectionDecode (
IN CONST VOID *InputSection, IN CONST VOID *InputSection,
OUT VOID **OutputBuffer, OUT VOID **OutputBuffer,
OUT VOID *ScratchBuffer, OPTIONAL IN VOID *ScratchBuffer, OPTIONAL
OUT UINT32 *AuthenticationStatus OUT UINT32 *AuthenticationStatus
) )
{ {
@ -248,10 +283,7 @@ ExtractGuidedSectionDecode (
// //
// Check the input parameters // Check the input parameters
// //
if (InputSection == NULL) { ASSERT (InputSection != NULL);
return RETURN_INVALID_PARAMETER;
}
ASSERT (OutputBuffer != NULL); ASSERT (OutputBuffer != NULL);
ASSERT (AuthenticationStatus != NULL); ASSERT (AuthenticationStatus != NULL);

145
MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.c
View File

@ -120,12 +120,18 @@ PeiGetExtractGuidedSectionHandlerInfo (
} }
/** /**
Get the supported exract guided section Handler guid list. Retrieve the list GUIDs that have been registered through ExtractGuidedSectionRegisterHandlers().
If ExtractHandlerGuidTable = NULL, then ASSERT.
@param[out] ExtractHandlerGuidTable The extract Handler guid pointer list. 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 A pointer to the array of GUIDs tht have been registerd through
ExtractGuidedSectionRegisterHandlers().
@return the number of the supported extract guided Handler. @return the number of the supported extract guided Handler.
**/ **/
UINTN UINTN
EFIAPI EFIAPI
@ -154,15 +160,28 @@ ExtractGuidedSectionGetGuidList (
} }
/** /**
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.
@param[in] SectionGuid The guid matches this Extraction function. Registers the handlers specified by GetInfoHandler and DecodeHandler witg the GUID specified by SectionGuid.
@param[in] GetInfoHandler Function to get info from guided section. If the GUID value specified by SectionGuid has already been registered, then return RETURN_ALREADY_STARTED.
@param[in] DecodeHandler Function to extract guided section. 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 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 Pointer to a function that decodes a GUIDed section into a caller
allocated output buffer.
@retval RETURN_SUCCESS The handlers were registered.
@retval RETURN_ALREADY_STARTED Handlers have already been registered for the GUID specified by SectionGuid.
@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to register the handlers.
@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 RETURN_STATUS
EFIAPI EFIAPI
@ -177,11 +196,13 @@ ExtractGuidedSectionRegisterHandlers (
PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo; PEI_EXTRACT_GUIDED_SECTION_HANDLER_INFO *HandlerInfo;
// //
// Check input paramter. // Check input paramter
// //
if (SectionGuid == NULL) { ASSERT (SectionGuid != NULL);
return RETURN_INVALID_PARAMETER; ASSERT (GetInfoHandler != NULL);
} ASSERT (DecodeHandler != NULL);
// //
// Get the registered handler information // Get the registered handler information
@ -223,24 +244,36 @@ ExtractGuidedSectionRegisterHandlers (
} }
/** /**
Get information from the guided section. This function first gets the guid value Retrives a GUID from a GUIDed section and uses that GUID to select an associated handler of type
from guided section header, then match this guid in the registered extract Handler list EXTRACT_GUIDED_SECTION_GET_INFO_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
to its corresponding getinfo Handler. The selected handler is used to retrieve and return the size of the decoded buffer and the size of an
If not found, RETURN_INVALID_PARAMETER will be return. optional scratch buffer required to actually decode the data in a GUIDed section.
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. Examines a GUIDed section specified by InputSection.
It will ASSERT () if the pointer to ScratchBufferSize is NULL. If GUID for InputSection does not match any of the GUIDs registered through ExtractGuidedSectionRegisterHandlers(),
It will ASSERT () if the pointer to SectionAttribute is NULL. 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 Buffer containing the input GUIDed section to be processed. @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBufferSize The size of OutputBuffer. @param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required if the buffer
@param[out] ScratchBufferSize The size of ScratchBuffer. specified by InputSection were decoded.
@param[out] SectionAttribute The attribute of the input guided section. @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_SUCCESS Get the required information successfully.
@retval RETURN_UNSUPPORTED Guided section data is not supported. @retval RETURN_UNSUPPORTED The GUID from the section specified by InputSection does not match any of
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. 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 RETURN_STATUS
@ -259,10 +292,7 @@ ExtractGuidedSectionGetInfo (
// //
// Check input paramter // Check input paramter
// //
if (InputSection == NULL) { ASSERT (InputSection != NULL);
return RETURN_INVALID_PARAMETER;
}
ASSERT (OutputBufferSize != NULL); ASSERT (OutputBufferSize != NULL);
ASSERT (ScratchBufferSize != NULL); ASSERT (ScratchBufferSize != NULL);
ASSERT (SectionAttribute != NULL); ASSERT (SectionAttribute != NULL);
@ -299,28 +329,37 @@ ExtractGuidedSectionGetInfo (
} }
/** /**
Extract data from the guided section. This function first gets the guid value Retrives the GUID from a GUIDed section and uses that GUID to select an associated handler of type
from guided section header, then match this guid in the registered extract Handler list EXTRACT_GUIDED_SECTION_DECODE_HANDLER that was registered with ExtractGuidedSectionRegisterHandlers().
to its corresponding extract Handler. The selected handler is used to decode the data in a GUIDed section and return the result in a caller
If not found, RETURN_INVALID_PARAMETER will be return. allocated output buffer.
If found, it will call this extract Handler to get output data and AuthenticationStatus.
It will ASSERT () if the pointer to OutputBuffer is NULL. Decodes the GUIDed section specified by InputSection.
It will ASSERT () if the pointer to AuthenticationStatus is NULL. 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 Buffer containing the input GUIDed section to be processed. @param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBuffer OutputBuffer to point the start of the section's contents @param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
if guided data is not required prcessing. Otherwise, @param[in] ScratchBuffer A caller allocated buffer that may be required by this function as a scratch buffer to perform the decode operation.
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 @param[out] AuthenticationStatus
A pointer to a caller-allocated UINT32 that indicates the A pointer to the authentication status of the decoded output buffer. See the definition
authentication status of the output buffer. of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI section of the PI
Specification.
@retval RETURN_SUCCESS Get the output data, size and AuthenticationStatus successfully. @retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
@retval RETURN_UNSUPPORTED Guided section data is not supported to be decoded. @retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The input data is not the valid guided section. @retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
**/ **/
RETURN_STATUS RETURN_STATUS
@ -328,7 +367,7 @@ EFIAPI
ExtractGuidedSectionDecode ( ExtractGuidedSectionDecode (
IN CONST VOID *InputSection, IN CONST VOID *InputSection,
OUT VOID **OutputBuffer, OUT VOID **OutputBuffer,
OUT VOID *ScratchBuffer, OPTIONAL IN VOID *ScratchBuffer, OPTIONAL
OUT UINT32 *AuthenticationStatus OUT UINT32 *AuthenticationStatus
) )
{ {
@ -339,9 +378,7 @@ ExtractGuidedSectionDecode (
// //
// Check input parameter // Check input parameter
// //
if (InputSection == NULL) { ASSERT (InputSection != NULL);
return RETURN_INVALID_PARAMETER;
}
ASSERT (OutputBuffer != NULL); ASSERT (OutputBuffer != NULL);
ASSERT (AuthenticationStatus != NULL); ASSERT (AuthenticationStatus != NULL);