/** @file
Section Extraction PEIM
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include
#include
#include
#include
#include
#include
/**
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
EFIAPI
CustomGuidedSectionExtract (
IN CONST EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI *This,
IN CONST VOID *InputSection,
OUT VOID **OutputBuffer,
OUT UINTN *OutputSize,
OUT UINT32 *AuthenticationStatus
);
//
// Module global for the Section Extraction PPI instance
//
CONST EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI mCustomGuidedSectionExtractionPpi = {
CustomGuidedSectionExtract
};
/**
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
EFIAPI
CustomGuidedSectionExtract (
IN CONST EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI *This,
IN CONST VOID *InputSection,
OUT VOID **OutputBuffer,
OUT UINTN *OutputSize,
OUT UINT32 *AuthenticationStatus
)
{
EFI_STATUS Status;
UINT8 *ScratchBuffer;
UINT32 ScratchBufferSize;
UINT32 OutputBufferSize;
UINT16 SectionAttribute;
//
// Init local variable
//
ScratchBuffer = NULL;
//
// Call GetInfo to get the size and attribute of input guided section data.
//
Status = ExtractGuidedSectionGetInfo (
InputSection,
&OutputBufferSize,
&ScratchBufferSize,
&SectionAttribute
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "GetInfo from guided section Failed - %r\n", Status));
return Status;
}
if (ScratchBufferSize != 0) {
//
// Allocate scratch buffer
//
ScratchBuffer = AllocatePages (EFI_SIZE_TO_PAGES (ScratchBufferSize));
if (ScratchBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
}
if (((SectionAttribute & EFI_GUIDED_SECTION_PROCESSING_REQUIRED) != 0) && OutputBufferSize > 0) {
//
// Allocate output buffer
//
*OutputBuffer = AllocatePages (EFI_SIZE_TO_PAGES (OutputBufferSize));
if (*OutputBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
DEBUG ((DEBUG_INFO, "Customized Guided section Memory Size required is 0x%x and address is 0x%p\n", OutputBufferSize, *OutputBuffer));
}
Status = ExtractGuidedSectionDecode (
InputSection,
OutputBuffer,
ScratchBuffer,
AuthenticationStatus
);
if (EFI_ERROR (Status)) {
//
// Decode failed
//
DEBUG ((DEBUG_ERROR, "Extract guided section Failed - %r\n", Status));
return Status;
}
*OutputSize = (UINTN) OutputBufferSize;
return EFI_SUCCESS;
}
/**
Main entry for Section Extraction PEIM driver.
This routine registers the Section Extraction PPIs that have been registered
with the Section Extraction Library.
@param FileHandle Handle of the file being invoked.
@param PeiServices Describes the list of possible PEI Services.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
SectionExtractionPeiEntry (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
EFI_GUID *ExtractHandlerGuidTable;
UINTN ExtractHandlerNumber;
EFI_PEI_PPI_DESCRIPTOR *GuidPpi;
//
// Get custom extract guided section method guid list
//
ExtractHandlerNumber = ExtractGuidedSectionGetGuidList (&ExtractHandlerGuidTable);
//
// Install custom extraction guid PPI
//
if (ExtractHandlerNumber > 0) {
GuidPpi = (EFI_PEI_PPI_DESCRIPTOR *) AllocatePool (ExtractHandlerNumber * sizeof (EFI_PEI_PPI_DESCRIPTOR));
ASSERT (GuidPpi != NULL);
while (ExtractHandlerNumber-- > 0) {
GuidPpi->Flags = EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
GuidPpi->Ppi = (VOID *) &mCustomGuidedSectionExtractionPpi;
GuidPpi->Guid = &ExtractHandlerGuidTable[ExtractHandlerNumber];
Status = PeiServicesInstallPpi (GuidPpi++);
ASSERT_EFI_ERROR (Status);
}
}
return EFI_SUCCESS;
}