diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdeModulePkg/Core/Dxe/FwVol/FwVolRead.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdeModulePkg/Core/Dxe/FwVol/FwVolRead.c')
| -rw-r--r-- | roms/edk2/MdeModulePkg/Core/Dxe/FwVol/FwVolRead.c | 536 |
1 files changed, 536 insertions, 0 deletions
diff --git a/roms/edk2/MdeModulePkg/Core/Dxe/FwVol/FwVolRead.c b/roms/edk2/MdeModulePkg/Core/Dxe/FwVol/FwVolRead.c new file mode 100644 index 000000000..2861cbf67 --- /dev/null +++ b/roms/edk2/MdeModulePkg/Core/Dxe/FwVol/FwVolRead.c @@ -0,0 +1,536 @@ +/** @file
+ Implements functions to read firmware file
+
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "DxeMain.h"
+#include "FwVolDriver.h"
+
+/**
+Required Alignment Alignment Value in FFS FFS_ATTRIB_DATA_ALIGNMENT2 Alignment Value in
+(bytes) Attributes Field in FFS Attributes Field Firmware Volume Interfaces
+1 0 0 0
+16 1 0 4
+128 2 0 7
+512 3 0 9
+1 KB 4 0 10
+4 KB 5 0 12
+32 KB 6 0 15
+64 KB 7 0 16
+128 KB 0 1 17
+256 KB 1 1 18
+512 KB 2 1 19
+1 MB 3 1 20
+2 MB 4 1 21
+4 MB 5 1 22
+8 MB 6 1 23
+16 MB 7 1 24
+**/
+UINT8 mFvAttributes[] = {0, 4, 7, 9, 10, 12, 15, 16};
+UINT8 mFvAttributes2[] = {17, 18, 19, 20, 21, 22, 23, 24};
+
+/**
+ Convert the FFS File Attributes to FV File Attributes
+
+ @param FfsAttributes The attributes of UINT8 type.
+
+ @return The attributes of EFI_FV_FILE_ATTRIBUTES
+
+**/
+EFI_FV_FILE_ATTRIBUTES
+FfsAttributes2FvFileAttributes (
+ IN EFI_FFS_FILE_ATTRIBUTES FfsAttributes
+ )
+{
+ UINT8 DataAlignment;
+ EFI_FV_FILE_ATTRIBUTES FileAttribute;
+
+ DataAlignment = (UINT8) ((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3);
+ ASSERT (DataAlignment < 8);
+
+ if ((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT_2) != 0) {
+ FileAttribute = (EFI_FV_FILE_ATTRIBUTES) mFvAttributes2[DataAlignment];
+ } else {
+ FileAttribute = (EFI_FV_FILE_ATTRIBUTES) mFvAttributes[DataAlignment];
+ }
+
+ if ((FfsAttributes & FFS_ATTRIB_FIXED) == FFS_ATTRIB_FIXED) {
+ FileAttribute |= EFI_FV_FILE_ATTRIB_FIXED;
+ }
+
+ return FileAttribute;
+}
+
+/**
+ Given the input key, search for the next matching file in the volume.
+
+ @param This Indicates the calling context.
+ @param Key Key is a pointer to a caller allocated
+ buffer that contains implementation specific
+ data that is used to track where to begin
+ the search for the next file. The size of
+ the buffer must be at least This->KeySize
+ bytes long. To reinitialize the search and
+ begin from the beginning of the firmware
+ volume, the entire buffer must be cleared to
+ zero. Other than clearing the buffer to
+ initiate a new search, the caller must not
+ modify the data in the buffer between calls
+ to GetNextFile().
+ @param FileType FileType is a pointer to a caller allocated
+ EFI_FV_FILETYPE. The GetNextFile() API can
+ filter it's search for files based on the
+ value of *FileType input. A *FileType input
+ of 0 causes GetNextFile() to search for
+ files of all types. If a file is found, the
+ file's type is returned in *FileType.
+ *FileType is not modified if no file is
+ found.
+ @param NameGuid NameGuid is a pointer to a caller allocated
+ EFI_GUID. If a file is found, the file's
+ name is returned in *NameGuid. *NameGuid is
+ not modified if no file is found.
+ @param Attributes Attributes is a pointer to a caller
+ allocated EFI_FV_FILE_ATTRIBUTES. If a file
+ is found, the file's attributes are returned
+ in *Attributes. *Attributes is not modified
+ if no file is found.
+ @param Size Size is a pointer to a caller allocated
+ UINTN. If a file is found, the file's size
+ is returned in *Size. *Size is not modified
+ if no file is found.
+
+ @retval EFI_SUCCESS Successfully find the file.
+ @retval EFI_DEVICE_ERROR Device error.
+ @retval EFI_ACCESS_DENIED Fv could not read.
+ @retval EFI_NOT_FOUND No matching file found.
+ @retval EFI_INVALID_PARAMETER Invalid parameter
+
+**/
+EFI_STATUS
+EFIAPI
+FvGetNextFile (
+ IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
+ IN OUT VOID *Key,
+ IN OUT EFI_FV_FILETYPE *FileType,
+ OUT EFI_GUID *NameGuid,
+ OUT EFI_FV_FILE_ATTRIBUTES *Attributes,
+ OUT UINTN *Size
+ )
+{
+ EFI_STATUS Status;
+ FV_DEVICE *FvDevice;
+ EFI_FV_ATTRIBUTES FvAttributes;
+ EFI_FFS_FILE_HEADER *FfsFileHeader;
+ UINTN *KeyValue;
+ LIST_ENTRY *Link;
+ FFS_FILE_LIST_ENTRY *FfsFileEntry;
+
+ FvDevice = FV_DEVICE_FROM_THIS (This);
+
+ Status = FvGetVolumeAttributes (This, &FvAttributes);
+ if (EFI_ERROR (Status)){
+ return Status;
+ }
+
+ //
+ // Check if read operation is enabled
+ //
+ if ((FvAttributes & EFI_FV2_READ_STATUS) == 0) {
+ return EFI_ACCESS_DENIED;
+ }
+
+ if (*FileType > EFI_FV_FILETYPE_SMM_CORE) {
+ //
+ // File type needs to be in 0 - 0x0D
+ //
+ return EFI_NOT_FOUND;
+ }
+
+ KeyValue = (UINTN *)Key;
+ for (;;) {
+ if (*KeyValue == 0) {
+ //
+ // Search for 1st matching file
+ //
+ Link = &FvDevice->FfsFileListHeader;
+ } else {
+ //
+ // Key is pointer to FFsFileEntry, so get next one
+ //
+ Link = (LIST_ENTRY *)(*KeyValue);
+ }
+
+ if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {
+ //
+ // Next is end of list so we did not find data
+ //
+ return EFI_NOT_FOUND;
+ }
+
+ FfsFileEntry = (FFS_FILE_LIST_ENTRY *)Link->ForwardLink;
+ FfsFileHeader = (EFI_FFS_FILE_HEADER *)FfsFileEntry->FfsHeader;
+
+ //
+ // remember the key
+ //
+ *KeyValue = (UINTN)FfsFileEntry;
+
+ if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {
+ //
+ // we ignore pad files
+ //
+ continue;
+ }
+
+ if (*FileType == EFI_FV_FILETYPE_ALL) {
+ //
+ // Process all file types so we have a match
+ //
+ break;
+ }
+
+ if (*FileType == FfsFileHeader->Type) {
+ //
+ // Found a matching file type
+ //
+ break;
+ }
+
+ }
+
+ //
+ // Return FileType, NameGuid, and Attributes
+ //
+ *FileType = FfsFileHeader->Type;
+ CopyGuid (NameGuid, &FfsFileHeader->Name);
+ *Attributes = FfsAttributes2FvFileAttributes (FfsFileHeader->Attributes);
+ if ((FvDevice->FwVolHeader->Attributes & EFI_FVB2_MEMORY_MAPPED) == EFI_FVB2_MEMORY_MAPPED) {
+ *Attributes |= EFI_FV_FILE_ATTRIB_MEMORY_MAPPED;
+ }
+
+ //
+ // we need to substract the header size
+ //
+ if (IS_FFS_FILE2 (FfsFileHeader)) {
+ *Size = FFS_FILE2_SIZE (FfsFileHeader) - sizeof (EFI_FFS_FILE_HEADER2);
+ } else {
+ *Size = FFS_FILE_SIZE (FfsFileHeader) - sizeof (EFI_FFS_FILE_HEADER);
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+
+/**
+ Locates a file in the firmware volume and
+ copies it to the supplied buffer.
+
+ @param This Indicates the calling context.
+ @param NameGuid Pointer to an EFI_GUID, which is the
+ filename.
+ @param Buffer Buffer is a pointer to pointer to a buffer
+ in which the file or section contents or are
+ returned.
+ @param BufferSize BufferSize is a pointer to caller allocated
+ UINTN. On input *BufferSize indicates the
+ size in bytes of the memory region pointed
+ to by Buffer. On output, *BufferSize
+ contains the number of bytes required to
+ read the file.
+ @param FoundType FoundType is a pointer to a caller allocated
+ EFI_FV_FILETYPE that on successful return
+ from Read() contains the type of file read.
+ This output reflects the file type
+ irrespective of the value of the SectionType
+ input.
+ @param FileAttributes FileAttributes is a pointer to a caller
+ allocated EFI_FV_FILE_ATTRIBUTES. On
+ successful return from Read(),
+ *FileAttributes contains the attributes of
+ the file read.
+ @param AuthenticationStatus AuthenticationStatus is a pointer to a
+ caller allocated UINTN in which the
+ authentication status is returned.
+
+ @retval EFI_SUCCESS Successfully read to memory buffer.
+ @retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.
+ @retval EFI_NOT_FOUND Not found.
+ @retval EFI_DEVICE_ERROR Device error.
+ @retval EFI_ACCESS_DENIED Could not read.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+ @retval EFI_OUT_OF_RESOURCES Not enough buffer to be allocated.
+
+**/
+EFI_STATUS
+EFIAPI
+FvReadFile (
+ IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
+ IN CONST EFI_GUID *NameGuid,
+ IN OUT VOID **Buffer,
+ IN OUT UINTN *BufferSize,
+ OUT EFI_FV_FILETYPE *FoundType,
+ OUT EFI_FV_FILE_ATTRIBUTES *FileAttributes,
+ OUT UINT32 *AuthenticationStatus
+ )
+{
+ EFI_STATUS Status;
+ FV_DEVICE *FvDevice;
+ EFI_GUID SearchNameGuid;
+ EFI_FV_FILETYPE LocalFoundType;
+ EFI_FV_FILE_ATTRIBUTES LocalAttributes;
+ UINTN FileSize;
+ UINT8 *SrcPtr;
+ EFI_FFS_FILE_HEADER *FfsHeader;
+ UINTN InputBufferSize;
+ UINTN WholeFileSize;
+
+ if (NameGuid == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ FvDevice = FV_DEVICE_FROM_THIS (This);
+
+
+ //
+ // Keep looking until we find the matching NameGuid.
+ // The Key is really a FfsFileEntry
+ //
+ FvDevice->LastKey = 0;
+ do {
+ LocalFoundType = 0;
+ Status = FvGetNextFile (
+ This,
+ &FvDevice->LastKey,
+ &LocalFoundType,
+ &SearchNameGuid,
+ &LocalAttributes,
+ &FileSize
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_NOT_FOUND;
+ }
+ } while (!CompareGuid (&SearchNameGuid, NameGuid));
+
+ //
+ // Get a pointer to the header
+ //
+ FfsHeader = FvDevice->LastKey->FfsHeader;
+ if (FvDevice->IsMemoryMapped) {
+ //
+ // Memory mapped FV has not been cached, so here is to cache by file.
+ //
+ if (!FvDevice->LastKey->FileCached) {
+ //
+ // Cache FFS file to memory buffer.
+ //
+ WholeFileSize = IS_FFS_FILE2 (FfsHeader) ? FFS_FILE2_SIZE (FfsHeader): FFS_FILE_SIZE (FfsHeader);
+ FfsHeader = AllocateCopyPool (WholeFileSize, FfsHeader);
+ if (FfsHeader == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ //
+ // Let FfsHeader in FfsFileEntry point to the cached file buffer.
+ //
+ FvDevice->LastKey->FfsHeader = FfsHeader;
+ FvDevice->LastKey->FileCached = TRUE;
+ }
+ }
+
+ //
+ // Remember callers buffer size
+ //
+ InputBufferSize = *BufferSize;
+
+ //
+ // Calculate return values
+ //
+ *FoundType = FfsHeader->Type;
+ *FileAttributes = FfsAttributes2FvFileAttributes (FfsHeader->Attributes);
+ if ((FvDevice->FwVolHeader->Attributes & EFI_FVB2_MEMORY_MAPPED) == EFI_FVB2_MEMORY_MAPPED) {
+ *FileAttributes |= EFI_FV_FILE_ATTRIB_MEMORY_MAPPED;
+ }
+ //
+ // Inherit the authentication status.
+ //
+ *AuthenticationStatus = FvDevice->AuthenticationStatus;
+ *BufferSize = FileSize;
+
+ if (Buffer == NULL) {
+ //
+ // If Buffer is NULL, we only want to get the information collected so far
+ //
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Skip over file header
+ //
+ if (IS_FFS_FILE2 (FfsHeader)) {
+ SrcPtr = ((UINT8 *) FfsHeader) + sizeof (EFI_FFS_FILE_HEADER2);
+ } else {
+ SrcPtr = ((UINT8 *) FfsHeader) + sizeof (EFI_FFS_FILE_HEADER);
+ }
+
+ Status = EFI_SUCCESS;
+ if (*Buffer == NULL) {
+ //
+ // Caller passed in a pointer so allocate buffer for them
+ //
+ *Buffer = AllocatePool (FileSize);
+ if (*Buffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ } else if (FileSize > InputBufferSize) {
+ //
+ // Callers buffer was not big enough
+ //
+ Status = EFI_WARN_BUFFER_TOO_SMALL;
+ FileSize = InputBufferSize;
+ }
+
+ //
+ // Copy data into callers buffer
+ //
+ CopyMem (*Buffer, SrcPtr, FileSize);
+
+ return Status;
+}
+
+
+
+/**
+ Locates a section in a given FFS File and
+ copies it to the supplied buffer (not including section header).
+
+ @param This Indicates the calling context.
+ @param NameGuid Pointer to an EFI_GUID, which is the
+ filename.
+ @param SectionType Indicates the section type to return.
+ @param SectionInstance Indicates which instance of sections with a
+ type of SectionType to return.
+ @param Buffer Buffer is a pointer to pointer to a buffer
+ in which the file or section contents or are
+ returned.
+ @param BufferSize BufferSize is a pointer to caller allocated
+ UINTN.
+ @param AuthenticationStatus AuthenticationStatus is a pointer to a
+ caller allocated UINT32 in which the
+ authentication status is returned.
+
+ @retval EFI_SUCCESS Successfully read the file section into
+ buffer.
+ @retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.
+ @retval EFI_NOT_FOUND Section not found.
+ @retval EFI_DEVICE_ERROR Device error.
+ @retval EFI_ACCESS_DENIED Could not read.
+ @retval EFI_INVALID_PARAMETER Invalid parameter.
+
+**/
+EFI_STATUS
+EFIAPI
+FvReadFileSection (
+ IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,
+ IN CONST EFI_GUID *NameGuid,
+ IN EFI_SECTION_TYPE SectionType,
+ IN UINTN SectionInstance,
+ IN OUT VOID **Buffer,
+ IN OUT UINTN *BufferSize,
+ OUT UINT32 *AuthenticationStatus
+ )
+{
+ EFI_STATUS Status;
+ FV_DEVICE *FvDevice;
+ EFI_FV_FILETYPE FileType;
+ EFI_FV_FILE_ATTRIBUTES FileAttributes;
+ UINTN FileSize;
+ UINT8 *FileBuffer;
+ FFS_FILE_LIST_ENTRY *FfsEntry;
+
+ if (NameGuid == NULL || Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ FvDevice = FV_DEVICE_FROM_THIS (This);
+
+ //
+ // Read the file
+ //
+ Status = FvReadFile (
+ This,
+ NameGuid,
+ NULL,
+ &FileSize,
+ &FileType,
+ &FileAttributes,
+ AuthenticationStatus
+ );
+ //
+ // Get the last key used by our call to FvReadFile as it is the FfsEntry for this file.
+ //
+ FfsEntry = (FFS_FILE_LIST_ENTRY *) FvDevice->LastKey;
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ if (IS_FFS_FILE2 (FfsEntry->FfsHeader)) {
+ FileBuffer = ((UINT8 *) FfsEntry->FfsHeader) + sizeof (EFI_FFS_FILE_HEADER2);
+ } else {
+ FileBuffer = ((UINT8 *) FfsEntry->FfsHeader) + sizeof (EFI_FFS_FILE_HEADER);
+ }
+ //
+ // Check to see that the file actually HAS sections before we go any further.
+ //
+ if (FileType == EFI_FV_FILETYPE_RAW) {
+ Status = EFI_NOT_FOUND;
+ goto Done;
+ }
+
+ //
+ // Use FfsEntry to cache Section Extraction Protocol Information
+ //
+ if (FfsEntry->StreamHandle == 0) {
+ Status = OpenSectionStream (
+ FileSize,
+ FileBuffer,
+ &FfsEntry->StreamHandle
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+ }
+
+ //
+ // If SectionType == 0 We need the whole section stream
+ //
+ Status = GetSection (
+ FfsEntry->StreamHandle,
+ (SectionType == 0) ? NULL : &SectionType,
+ NULL,
+ (SectionType == 0) ? 0 : SectionInstance,
+ Buffer,
+ BufferSize,
+ AuthenticationStatus,
+ FvDevice->IsFfs3Fv
+ );
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // Inherit the authentication status.
+ //
+ *AuthenticationStatus |= FvDevice->AuthenticationStatus;
+ }
+
+ //
+ // Close of stream defered to close of FfsHeader list to allow SEP to cache data
+ //
+
+Done:
+ return Status;
+}
+
+
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