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Refine the comments for the function header. 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15827 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Eric Dong 2014-08-19 02:44:24 +00:00 committed by ydong10
parent 3449f56dac
commit d5eea98e20
2 changed files with 137 additions and 6 deletions
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86
MdeModulePkg/Universal/SectionExtractionDxe/SectionExtractionDxe.c
View File

@ -20,9 +20,89 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Library/BaseMemoryLib.h> #include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h> #include <Library/UefiBootServicesTableLib.h>
// /**
// Function prototype for Section Extraction Protocol service The ExtractSection() function processes the input section and
// allocates a buffer from the pool in which it returns the section
contents. If the section being extracted contains
authentication information (the section's
GuidedSectionHeader.Attributes field has the
EFI_GUIDED_SECTION_AUTH_STATUS_VALID bit set), the values
returned in AuthenticationStatus must reflect the results of
the authentication operation. Depending on the algorithm and
size of the encapsulated data, the time that is required to do
a full authentication may be prohibitively long for some
classes of systems. To indicate this, use
EFI_SECURITY_POLICY_PROTOCOL_GUID, which may be published by
the security policy driver (see the Platform Initialization
Driver Execution Environment Core Interface Specification for
more details and the GUID definition). If the
EFI_SECURITY_POLICY_PROTOCOL_GUID exists in the handle
database, then, if possible, full authentication should be
skipped and the section contents simply returned in the
OutputBuffer. In this case, the
EFI_AUTH_STATUS_PLATFORM_OVERRIDE bit AuthenticationStatus
must be set on return. ExtractSection() is callable only from
TPL_NOTIFY and below. Behavior of ExtractSection() at any
EFI_TPL above TPL_NOTIFY is undefined. Type EFI_TPL is
defined in RaiseTPL() in the UEFI 2.0 specification.
@param This Indicates the
EFI_GUIDED_SECTION_EXTRACTION_PROTOCOL instance.
@param InputSection Buffer containing the input GUIDed section
to be processed. OutputBuffer OutputBuffer
is allocated from boot services pool
memory and contains the new section
stream. The caller is responsible for
freeing this buffer.
@param OutputBuffer *OutputBuffer is allocated from boot services
pool memory and contains the new section stream.
The caller is responsible for freeing this buffer.
@param OutputSize A pointer to a caller-allocated UINTN in
which the size of OutputBuffer allocation
is stored. If the function returns
anything other than EFI_SUCCESS, the value
of OutputSize is undefined.
@param AuthenticationStatus A pointer to a caller-allocated
UINT32 that indicates the
authentication status of the
output buffer. If the input
section's
GuidedSectionHeader.Attributes
field has the
EFI_GUIDED_SECTION_AUTH_STATUS_VAL
bit as clear, AuthenticationStatus
must return zero. Both local bits
(19:16) and aggregate bits (3:0)
in AuthenticationStatus are
returned by ExtractSection().
These bits reflect the status of
the extraction operation. The bit
pattern in both regions must be
the same, as the local and
aggregate authentication statuses
have equivalent meaning at this
level. If the function returns
anything other than EFI_SUCCESS,
the value of AuthenticationStatus
is undefined.
@retval EFI_SUCCESS The InputSection was successfully
processed and the section contents were
returned.
@retval EFI_OUT_OF_RESOURCES The system has insufficient
resources to process the
request.
@retval EFI_INVALID_PARAMETER The GUID in InputSection does
not match this instance of the
GUIDed Section Extraction
Protocol.
**/
EFI_STATUS EFI_STATUS
EFIAPI EFIAPI
CustomGuidedSectionExtract ( CustomGuidedSectionExtract (

57
MdeModulePkg/Universal/SectionExtractionPei/SectionExtractionPei.c
View File

@ -19,9 +19,60 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Library/MemoryAllocationLib.h> #include <Library/MemoryAllocationLib.h>
#include <Library/PeiServicesLib.h> #include <Library/PeiServicesLib.h>
// /**
// Function prototype for Section Extraction PPI service The ExtractSection() function processes the input section and
// returns a pointer to the section contents. If the section being
extracted does not require processing (if the section
GuidedSectionHeader.Attributes has the
EFI_GUIDED_SECTION_PROCESSING_REQUIRED field cleared), then
OutputBuffer is just updated to point to the start of the
section's contents. Otherwise, *Buffer must be allocated
from PEI permanent memory.
@param This Indicates the
EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI instance.
Buffer containing the input GUIDed section to be
processed. OutputBuffer OutputBuffer is
allocated from PEI permanent memory and contains
the new section stream.
@param InputSection A pointer to the input buffer, which contains
the input section to be processed.
@param OutputBuffer A pointer to a caller-allocated buffer, whose
size is specified by the contents of OutputSize.
@param OutputSize A pointer to a caller-allocated
UINTN in which the size of *OutputBuffer
allocation is stored. If the function
returns anything other than EFI_SUCCESS,
the value of OutputSize is undefined.
@param AuthenticationStatus A pointer to a caller-allocated
UINT32 that indicates the
authentication status of the
output buffer. If the input
section's GuidedSectionHeader.
Attributes field has the
EFI_GUIDED_SECTION_AUTH_STATUS_VALID
bit as clear,
AuthenticationStatus must return
zero. These bits reflect the
status of the extraction
operation. If the function
returns anything other than
EFI_SUCCESS, the value of
AuthenticationStatus is
undefined.
@retval EFI_SUCCESS The InputSection was
successfully processed and the
section contents were returned.
@retval EFI_OUT_OF_RESOURCES The system has insufficient
resources to process the request.
@retval EFI_INVALID_PARAMETER The GUID in InputSection does
not match this instance of the
GUIDed Section Extraction PPI.
**/
EFI_STATUS EFI_STATUS
EFIAPI EFIAPI
CustomGuidedSectionExtract ( CustomGuidedSectionExtract (