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Code Issues Packages Projects Releases Wiki Activity

1) Update comments for API in DxePiLib.h 

2) Fix a bug that SectionInstance is not referenced in the function GetSectionFromFv
3) Some minor cleanup.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5711 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qwang12 2008-08-22 09:09:24 +00:00
parent 6812ef9fea
commit ff197efbbc
2 changed files with 264 additions and 256 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

181
MdePkg/Include/Library/DxePiLib.h
View File

@ -19,40 +19,47 @@
/**
Allocate and fill a buffer from the Firmware Section identified by a Firmware File GUID name and a Firmware
Section type and instance number from any Firmware Volumes in the system.
Locates a requested firmware section within a file and returns it to a buffer allocated by this function.
The function will read the first Firmware Section sepcifed by NameGuid, SectionType and Instance by searching
for all Firmware Volumes in the system.
PiLibGetSectionFromAnyFv () is used to read a specific section from a file within a firmware volume. The function
will search the first file with the specified name in all firmware volumes in the system. The search order for firmware
volumes in the system is determistic but abitrary if no new firmware volume is added into the system between
each calls of this function.
The search order for Firmware Volumes in the system is determistic but abitrary if no new Firmware Volume is installed
into the system. The search order for the section specified by SectionType within a Firmware File is defined by
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection (). Please check Section 2.4 of Volume 3: Platform Initialization
Shared Architectural Elements for detailes.
After the specific file is located, the function searches the specifc firmware section with type SectionType in this file.
The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection ()
found in PI Specification.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section specified is found to match ,
EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param Instance The instance number of Firmware Section to read from starting from 0.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@param NameGuid Pointer to an EFI_GUID, which indicates the file name from which the requested
section will be read. Type EFI_GUID is defined in
InstallProtocolInterface() in the UEFI 2.0 specification.
@param SectionType Indicates the section type to return. SectionType in conjunction with
SectionInstance indicates which section to return. Type
EFI_SECTION_TYPE is defined in EFI_COMMON_SECTION_HEADER.
@param SectionInstance Indicates which instance of sections with a type of SectionType to return.
SectionType in conjunction with SectionInstance indicates which section to
return. SectionInstance is zero based.
@param Buffer Pointer to a pointer to a buffer in which the section contents are returned, not
including the section header. Caller is responsible to free this memory.
@param Size Pointer to a caller-allocated UINTN. It indicates the size of the memory represented by
*Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
@ -60,49 +67,52 @@ EFIAPI
PiLibGetSectionFromAnyFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)
;
/**
Allocate and fill a buffer from a Firmware Section identified by a Firmware File GUID name, a Firmware
Section type and instance number from the same Firmware Volume with the caller's FFS.
Locates a requested firmware section within a file and returns it to a buffer allocated by this function.
This functions first locates the EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance for same Firmrware Volume
which also contains the FFS of the caller in order to carry out the Firmware Volume read operation.
The function then reads the Firmware Section found sepcifed by NameGuid, SectionType and Instance.
PiLibGetSectionFromCurrentFv () is used to read a specific section from a file within the same firmware volume from which
the running image is loaded. If the specific file is found, the function searches the specifc firmware section with type SectionType.
The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection ()
found in PI Specification.
The search order for the section specified by SectionType within a Firmware File is defined by
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection (). Please check Section 2.4 of Volume 3: Platform Initialization
Shared Architectural Elements for detailes.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section specified is found to match ,
EFI_NOT_FOUND is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can be only called at TPL_NOTIFY and below.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can be only called at TPL_NOTIFY and below.
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
If FvHandle is NULL, then ASSERT ();
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param NameGuid Pointer to an EFI_GUID, which indicates the file name from which the requested
section will be read. Type EFI_GUID is defined in
InstallProtocolInterface() in the UEFI 2.0 specification.
@param SectionType Indicates the section type to return. SectionType in conjunction with
SectionInstance indicates which section to return. Type
EFI_SECTION_TYPE is defined in EFI_COMMON_SECTION_HEADER.
@param SectionInstance Indicates which instance of sections with a type of SectionType to return.
SectionType in conjunction with SectionInstance indicates which section to
return. SectionInstance is zero based.
@param Buffer Pointer to a pointer to a buffer in which the section contents are returned, not
including the section header. Caller is responsible to free this memory.
@param Size Pointer to a caller-allocated UINTN. It indicates the size of the memory represented by
*Buffer.
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param Instance The instance number of Firmware Section to read from starting from 0.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_UNSUPPORTED FvHandle does not support EFI_FIRMWARE_VOLUME2_PROTOCOL.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_UNSUPPORTED FvHandle does not support EFI_FIRMWARE_VOLUME2_PROTOCOL.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
@ -110,7 +120,7 @@ EFIAPI
PiLibGetSectionFromCurrentFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)
@ -118,47 +128,46 @@ PiLibGetSectionFromCurrentFv (
/**
Allocate and fill a buffer from the first Firmware Section in the same Firmware File as the caller of this function.
Locates a requested firmware section within a file and returns it to a buffer allocated by this function.
The function will read the first Firmware Section found sepcifed by NameGuid and SectionType from the
Firmware Volume specified by FvHandle. On this FvHandle, an EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance
should be located succesfully in order to carry out the Firmware Volume operations.
PiLibGetSectionFromCurrentFfs () searches the specifc firmware section with type SectionType in the same firmware file from
which the running image is loaded. The details of this search order is defined in description of
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection () found in PI Specification.
The search order for the section type specified by SectionType in the Firmware File is using a depth-first
and left-to-right algorithm through all sections. The first section found to match SectionType will be returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
If SectionType is EFI_SECTION_PE32, EFI_SECTION_PE32 will be used as Firmware Section type
to read Firmware Section data from the Firmware File. If no such section exists, the function will try
to read a Firmware File named with NameGuid. If no such file exists, EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section exists, the function will try to read a Firmware
File named with NameGuid. If no such file exists, EFI_NOT_FOUND is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param SectionType Indicates the section type to return. SectionType in conjunction with
SectionInstance indicates which section to return. Type
EFI_SECTION_TYPE is defined in EFI_COMMON_SECTION_HEADER.
@param SectionInstance Indicates which instance of sections with a type of SectionType to return.
SectionType in conjunction with SectionInstance indicates which section to
return. SectionInstance is zero based.
@param Buffer Pointer to a pointer to a buffer in which the section contents are returned, not
including the section header. Caller is responsible to free this memory.
@param Size Pointer to a caller-allocated UINTN. It indicates the size of the memory represented by
*Buffer.
@param SectionType The Firmware Section type.
@param Instance Instance number of a section.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
EFIAPI
PiLibGetSectionFromCurrentFfs (
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)

263
MdePkg/Library/DxePiLib/DxePiLib.c
View File

@ -65,16 +65,14 @@ InternalImageHandleToFvHandle (
This functions first locate the EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance on FvHandle in order to
carry out the Firmware Volume read operation. The function then reads the Firmware Section found sepcifed
by NameGuid, SectionType and Instance.
by NameGuid, SectionType and SectionInstance.
The search order for the section specified by SectionType within a Firmware File is defined by
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection (). Please check Section 2.4 of Volume 3: Platform Initialization
Shared Architectural Elements for detailes.
The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection ()
found in PI Specification.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section specified is found to match ,
EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can be only called at TPL_NOTIFY and below.
@ -84,19 +82,19 @@ InternalImageHandleToFvHandle (
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param FvHandle The device handle that contains a instance of EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param Instance The instance number of Firmware Section to read from starting from 0.
@param FvHandle The device handle that contains a instance of EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param SectionInstance The instance number of Firmware Section to read from starting from 0.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_UNSUPPORTED FvHandle does not support EFI_FIRMWARE_VOLUME2_PROTOCOL.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_UNSUPPORTED FvHandle does not support EFI_FIRMWARE_VOLUME2_PROTOCOL.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
@ -104,7 +102,7 @@ GetSectionFromFv (
IN EFI_HANDLE FvHandle,
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)
@ -133,7 +131,7 @@ GetSectionFromFv (
Fv,
NameGuid,
SectionType,
0,
SectionInstance,
Buffer,
Size,
&AuthenticationStatus
@ -149,7 +147,7 @@ GetSectionFromFv (
Fv,
NameGuid,
EFI_SECTION_PE32,
0,
SectionInstance,
Buffer,
Size,
&AuthenticationStatus
@ -162,40 +160,47 @@ GetSectionFromFv (
/**
Allocate and fill a buffer from the Firmware Section identified by a Firmware File GUID name and a Firmware
Section type and instance number from any Firmware Volumes in the system.
Locates a requested firmware section within a file and returns it to a buffer allocated by this function.
The function will read the first Firmware Section sepcifed by NameGuid, SectionType and Instance by searching
for all Firmware Volumes in the system.
PiLibGetSectionFromAnyFv () is used to read a specific section from a file within a firmware volume. The function
will search the first file with the specified name in all firmware volumes in the system. The search order for firmware
volumes in the system is determistic but abitrary if no new firmware volume is added into the system between
each calls of this function.
The search order for Firmware Volumes in the system is determistic but abitrary if no new Firmware Volume is installed
into the system. The search order for the section specified by SectionType within a Firmware File is defined by
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection (). Please check Section 2.4 of Volume 3: Platform Initialization
Shared Architectural Elements for detailes.
After the specific file is located, the function searches the specifc firmware section with type SectionType in this file.
The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection ()
found in PI Specification.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section specified is found to match ,
EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param Instance The instance number of Firmware Section to read from starting from 0.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@param NameGuid Pointer to an EFI_GUID, which indicates the file name from which the requested
section will be read. Type EFI_GUID is defined in
InstallProtocolInterface() in the UEFI 2.0 specification.
@param SectionType Indicates the section type to return. SectionType in conjunction with
SectionInstance indicates which section to return. Type
EFI_SECTION_TYPE is defined in EFI_COMMON_SECTION_HEADER.
@param SectionInstance Indicates which instance of sections with a type of SectionType to return.
SectionType in conjunction with SectionInstance indicates which section to
return. SectionInstance is zero based.
@param Buffer Pointer to a pointer to a buffer in which the section contents are returned, not
including the section header. Caller is responsible to free this memory.
@param Size Pointer to a caller-allocated UINTN. It indicates the size of the memory represented by
*Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
@ -203,7 +208,7 @@ EFIAPI
PiLibGetSectionFromAnyFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)
@ -213,7 +218,6 @@ PiLibGetSectionFromAnyFv (
UINTN HandleCount;
UINTN Index;
EFI_HANDLE FvHandle;
EFI_TPL OldTpl;
//
// Search the FV that contain the caller's FFS first.
@ -226,7 +230,7 @@ PiLibGetSectionFromAnyFv (
FvHandle,
NameGuid,
SectionType,
Instance,
SectionInstance,
Buffer,
Size
);
@ -234,8 +238,6 @@ PiLibGetSectionFromAnyFv (
return EFI_SUCCESS;
}
OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
HandleBuffer = NULL;
Status = gBS->LocateHandleBuffer (
ByProtocol,
@ -248,26 +250,25 @@ PiLibGetSectionFromAnyFv (
goto Done;
}
for (Index = 0; Index < HandleCount; ++Index) {
for (Index = 0; Index < HandleCount; Index++) {
//
// Skip the FV that contain the caller's FFS
//
if (HandleBuffer[Index] == FvHandle) {
continue;
if (HandleBuffer[Index] != FvHandle) {
Status = GetSectionFromFv (
HandleBuffer[Index],
NameGuid,
SectionType,
SectionInstance,
Buffer,
Size
);
if (!EFI_ERROR (Status)) {
goto Done;
}
}
Status = GetSectionFromFv (
HandleBuffer[Index],
NameGuid,
SectionType,
Instance,
Buffer,
Size
);
if (!EFI_ERROR (Status)) {
goto Done;
}
}
if (Index == HandleCount) {
@ -276,8 +277,6 @@ PiLibGetSectionFromAnyFv (
Done:
gBS->RestoreTPL (OldTpl);
if (HandleBuffer != NULL) {
FreePool(HandleBuffer);
}
@ -286,42 +285,45 @@ Done:
}
/**
Allocate and fill a buffer from a Firmware Section identified by a Firmware File GUID name, a Firmware
Section type and instance number from the same Firmware Volume with the caller's FFS.
Locates a requested firmware section within a file and returns it to a buffer allocated by this function.
This functions first locates the EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance for same Firmrware Volume
which also contains the FFS of the caller in order to carry out the Firmware Volume read operation.
The function then reads the Firmware Section found sepcifed by NameGuid, SectionType and Instance.
PiLibGetSectionFromCurrentFv () is used to read a specific section from a file within the same firmware volume from which
the running image is loaded. If the specific file is found, the function searches the specifc firmware section with type SectionType.
The details of this search order is defined in description of EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection ()
found in PI Specification.
The search order for the section specified by SectionType within a Firmware File is defined by
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection (). Please check Section 2.4 of Volume 3: Platform Initialization
Shared Architectural Elements for detailes.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section specified is found to match ,
EFI_NOT_FOUND is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can be only called at TPL_NOTIFY and below.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can be only called at TPL_NOTIFY and below.
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
If FvHandle is NULL, then ASSERT ();
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param NameGuid Pointer to an EFI_GUID, which indicates the file name from which the requested
section will be read. Type EFI_GUID is defined in
InstallProtocolInterface() in the UEFI 2.0 specification.
@param SectionType Indicates the section type to return. SectionType in conjunction with
SectionInstance indicates which section to return. Type
EFI_SECTION_TYPE is defined in EFI_COMMON_SECTION_HEADER.
@param SectionInstance Indicates which instance of sections with a type of SectionType to return.
SectionType in conjunction with SectionInstance indicates which section to
return. SectionInstance is zero based.
@param Buffer Pointer to a pointer to a buffer in which the section contents are returned, not
including the section header. Caller is responsible to free this memory.
@param Size Pointer to a caller-allocated UINTN. It indicates the size of the memory represented by
*Buffer.
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param Instance The instance number of Firmware Section to read from starting from 0.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_UNSUPPORTED FvHandle does not support EFI_FIRMWARE_VOLUME2_PROTOCOL.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_UNSUPPORTED FvHandle does not support EFI_FIRMWARE_VOLUME2_PROTOCOL.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
@ -329,7 +331,7 @@ EFIAPI
PiLibGetSectionFromCurrentFv (
IN CONST EFI_GUID *NameGuid,
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)
@ -338,7 +340,7 @@ PiLibGetSectionFromCurrentFv (
InternalImageHandleToFvHandle(gImageHandle),
NameGuid,
SectionType,
Instance,
SectionInstance,
Buffer,
Size
);
@ -346,49 +348,46 @@ PiLibGetSectionFromCurrentFv (
/**
Allocate and fill a buffer from the first Firmware Section in the same Firmware File as the caller of this function.
Locates a requested firmware section within a file and returns it to a buffer allocated by this function.
The function will read the first Firmware Section found sepcifed by NameGuid and SectionType from the
Firmware Volume specified by FvHandle. On this FvHandle, an EFI_FIRMWARE_VOLUME2_PROTOCOL protocol instance
should be located succesfully in order to carry out the Firmware Volume operations.
PiLibGetSectionFromCurrentFfs () searches the specifc firmware section with type SectionType in the same firmware file from
which the running image is loaded. The details of this search order is defined in description of
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection () found in PI Specification.
The search order for the section type specified by SectionType in the Firmware File is using a depth-first
and left-to-right algorithm through all sections. The first section found to match SectionType will be returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE is used as section type to start the search. If EFI_SECTION_TE section
is not found, EFI_SECTION_PE32 will be used to try the search again. If no EFI_SECTION_PE32 section is found, EFI_NOT_FOUND
is returned.
If SectionType is EFI_SECTION_PE32, EFI_SECTION_PE32 will be used as Firmware Section type
to read Firmware Section data from the Firmware File. If no such section exists, the function will try
to read a Firmware File named with NameGuid. If no such file exists, EFI_NOT_FOUND is returned.
If SectionType is EFI_SECTION_TE, EFI_SECTION_TE will be used as Firmware Section type to read Firmware Section
data from the Firmware File. If no such section exists, EFI_SECTION_PE32 will be used as Firmware Section type to
read Firmware Section data from the Firmware File. If no such section exists, the function will try to read a Firmware
File named with NameGuid. If no such file exists, EFI_NOT_FOUND is returned.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
The data and size is returned by Buffer and Size. The caller is responsible to free the Buffer allocated
by this function. This function can only be called at TPL_NOTIFY and below.
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
If FvHandle is NULL and WithinImage is TRUE, then ASSERT ();
If NameGuid is NULL, then ASSERT();
If Buffer is NULL, then ASSERT();
If Size is NULL, then ASSERT().
@param SectionType Indicates the section type to return. SectionType in conjunction with
SectionInstance indicates which section to return. Type
EFI_SECTION_TYPE is defined in EFI_COMMON_SECTION_HEADER.
@param SectionInstance Indicates which instance of sections with a type of SectionType to return.
SectionType in conjunction with SectionInstance indicates which section to
return. SectionInstance is zero based.
@param Buffer Pointer to a pointer to a buffer in which the section contents are returned, not
including the section header. Caller is responsible to free this memory.
@param Size Pointer to a caller-allocated UINTN. It indicates the size of the memory represented by
*Buffer.
@param NameGuid The GUID name of a Firmware File.
@param SectionType The Firmware Section type.
@param Buffer On output, Buffer contains the the data read from the section in the Firmware File found.
@param Size On output, the size of Buffer.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
@retval EFI_SUCCESS The image is found and data and size is returned.
@retval EFI_NOT_FOUND The image specified by NameGuid and SectionType can't be found.
@retval EFI_OUT_OF_RESOURCES There were not enough resources to allocate the output data buffer or complete the operations.
@retval EFI_DEVICE_ERROR A hardware error occurs during reading from the Firmware Volume.
@retval EFI_ACCESS_DENIED The firmware volume containing the searched Firmware File is configured to disallow reads.
**/
EFI_STATUS
EFIAPI
PiLibGetSectionFromCurrentFfs (
IN EFI_SECTION_TYPE SectionType,
IN UINTN Instance,
IN UINTN SectionInstance,
OUT VOID **Buffer,
OUT UINTN *Size
)
@ -397,7 +396,7 @@ PiLibGetSectionFromCurrentFfs (
InternalImageHandleToFvHandle(gImageHandle),
&gEfiCallerIdGuid,
SectionType,
Instance,
SectionInstance,
Buffer,
Size
);