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-rw-r--r--EmbeddedPkg/Include/Library/PrePiLib.h23
-rw-r--r--EmbeddedPkg/Library/PrePiLib/FwVol.c42
-rw-r--r--EmbeddedPkg/Library/PrePiLib/PrePiLib.c2
3 files changed, 49 insertions, 18 deletions
diff --git a/EmbeddedPkg/Include/Library/PrePiLib.h b/EmbeddedPkg/Include/Library/PrePiLib.h
index 3741b08c44..f60b667818 100644
--- a/EmbeddedPkg/Include/Library/PrePiLib.h
+++ b/EmbeddedPkg/Include/Library/PrePiLib.h
@@ -53,10 +53,22 @@ FfsFindNextFile (
);
/**
+ * This is a hook which is used to check if the section is the target one.
+ *
+ */
+typedef
+EFI_STATUS
+(EFIAPI *FFS_CHECK_SECTION_HOOK)(
+ IN EFI_COMMON_SECTION_HEADER *Section
+ );
+
+/**
This service enables discovery sections of a given type within a valid FFS file.
+ Caller also can provide a SectionCheckHook to do additional checking.
- @param SearchType The value of the section type to find.
- @param FfsFileHeader A pointer to the file header that contains the set of sections to
+ @param SectionType The value of the section type to find.
+ @param SectionCheckHook A hook which can check if the section is the target one.
+ @param FileHeader A pointer to the file header that contains the set of sections to
be searched.
@param SectionData A pointer to the discovered section, if successful.
@@ -67,9 +79,10 @@ FfsFindNextFile (
EFI_STATUS
EFIAPI
FfsFindSectionData (
- IN EFI_SECTION_TYPE SectionType,
- IN EFI_PEI_FILE_HANDLE FileHandle,
- OUT VOID **SectionData
+ IN EFI_SECTION_TYPE SectionType,
+ IN FFS_CHECK_SECTION_HOOK SectionCheckHook,
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ OUT VOID **SectionData
);
/**
diff --git a/EmbeddedPkg/Library/PrePiLib/FwVol.c b/EmbeddedPkg/Library/PrePiLib/FwVol.c
index 0a6d6925b7..778d8b13c3 100644
--- a/EmbeddedPkg/Library/PrePiLib/FwVol.c
+++ b/EmbeddedPkg/Library/PrePiLib/FwVol.c
@@ -264,16 +264,18 @@ FindFileEx (
Go through the file to search SectionType section,
when meeting an encapsuled section.
- @param SectionType - Filter to find only section of this type.
- @param Section - From where to search.
- @param SectionSize - The file size to search.
- @param OutputBuffer - Pointer to the section to search.
+ @param SectionType - Filter to find only section of this type.
+ @param SectionCheckHook - A hook which can check if the section is the target one.
+ @param Section - From where to search.
+ @param SectionSize - The file size to search.
+ @param OutputBuffer - Pointer to the section to search.
@retval EFI_SUCCESS
**/
EFI_STATUS
FfsProcessSection (
IN EFI_SECTION_TYPE SectionType,
+ IN FFS_CHECK_SECTION_HOOK SectionCheckHook,
IN EFI_COMMON_SECTION_HEADER *Section,
IN UINTN SectionSize,
OUT VOID **OutputBuffer
@@ -292,7 +294,9 @@ FfsProcessSection (
UINT32 AuthenticationStatus;
CHAR8 *CompressedData;
UINT32 CompressedDataLength;
+ BOOLEAN Found;
+ Found = FALSE;
*OutputBuffer = NULL;
ParsedLength = 0;
Status = EFI_NOT_FOUND;
@@ -302,13 +306,23 @@ FfsProcessSection (
}
if (Section->Type == SectionType) {
- if (IS_SECTION2 (Section)) {
- *OutputBuffer = (VOID *)((UINT8 *)Section + sizeof (EFI_COMMON_SECTION_HEADER2));
+ if (SectionCheckHook != NULL) {
+ Found = SectionCheckHook (Section) == EFI_SUCCESS;
} else {
- *OutputBuffer = (VOID *)((UINT8 *)Section + sizeof (EFI_COMMON_SECTION_HEADER));
+ Found = TRUE;
}
- return EFI_SUCCESS;
+ if (Found) {
+ if (IS_SECTION2 (Section)) {
+ *OutputBuffer = (VOID *)((UINT8 *)Section + sizeof (EFI_COMMON_SECTION_HEADER2));
+ } else {
+ *OutputBuffer = (VOID *)((UINT8 *)Section + sizeof (EFI_COMMON_SECTION_HEADER));
+ }
+
+ return EFI_SUCCESS;
+ } else {
+ goto CheckNextSection;
+ }
} else if ((Section->Type == EFI_SECTION_COMPRESSION) || (Section->Type == EFI_SECTION_GUID_DEFINED)) {
if (Section->Type == EFI_SECTION_COMPRESSION) {
if (IS_SECTION2 (Section)) {
@@ -415,6 +429,7 @@ FfsProcessSection (
} else {
return FfsProcessSection (
SectionType,
+ SectionCheckHook,
DstBuffer,
DstBufferSize,
OutputBuffer
@@ -422,6 +437,7 @@ FfsProcessSection (
}
}
+CheckNextSection:
if (IS_SECTION2 (Section)) {
SectionLength = SECTION2_SIZE (Section);
} else {
@@ -456,9 +472,10 @@ FfsProcessSection (
EFI_STATUS
EFIAPI
FfsFindSectionData (
- IN EFI_SECTION_TYPE SectionType,
- IN EFI_PEI_FILE_HANDLE FileHandle,
- OUT VOID **SectionData
+ IN EFI_SECTION_TYPE SectionType,
+ IN FFS_CHECK_SECTION_HOOK SectionCheckHook,
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ OUT VOID **SectionData
)
{
EFI_FFS_FILE_HEADER *FfsFileHeader;
@@ -478,6 +495,7 @@ FfsFindSectionData (
return FfsProcessSection (
SectionType,
+ SectionCheckHook,
Section,
FileSize,
SectionData
@@ -799,7 +817,7 @@ FfsProcessFvFile (
//
// Find FvImage in FvFile
//
- Status = FfsFindSectionData (EFI_SECTION_FIRMWARE_VOLUME_IMAGE, FvFileHandle, (VOID **)&FvImageHandle);
+ Status = FfsFindSectionData (EFI_SECTION_FIRMWARE_VOLUME_IMAGE, NULL, FvFileHandle, (VOID **)&FvImageHandle);
if (EFI_ERROR (Status)) {
return Status;
}
diff --git a/EmbeddedPkg/Library/PrePiLib/PrePiLib.c b/EmbeddedPkg/Library/PrePiLib/PrePiLib.c
index a0c5d02deb..3b6fc4f0eb 100644
--- a/EmbeddedPkg/Library/PrePiLib/PrePiLib.c
+++ b/EmbeddedPkg/Library/PrePiLib/PrePiLib.c
@@ -131,7 +131,7 @@ LoadDxeCoreFromFfsFile (
VOID *Hob;
EFI_FV_FILE_INFO FvFileInfo;
- Status = FfsFindSectionData (EFI_SECTION_PE32, FileHandle, &PeCoffImage);
+ Status = FfsFindSectionData (EFI_SECTION_PE32, NULL, FileHandle, &PeCoffImage);
if (EFI_ERROR (Status)) {
return Status;
}