mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-25 16:37:42 +01:00
340 lines
13 KiB
C
340 lines
13 KiB
C
//
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/// @file OsxFatBinaryDrv/OsxFatBinary.c
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///
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/// Fat Binary driver
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///
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/// Fat Binary driver to add Fat Binary support to the LoadImage-function
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///
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//
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// CHANGELOG:
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//
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// UNKNOWN DATE
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// Kabyl and rafirafi
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// Initial implementation
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//
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#include "OsxFatBinaryDrv.h"
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#include <Library/UefiLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/DevicePathLib.h>
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#include <Protocol/LoadedImage.h>
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#include <Protocol/LoadFile.h>
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#include <Protocol/SimpleFileSystem.h>
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#include <Guid/FileInfo.h>
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// UefiMain
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/// The user Entry Point for Application. The user code starts with this function
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/// as the real entry point for the application.
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///
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/// @param[in] ImageHandle The firmware allocated handle for the EFI image.
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/// @param[in] SystemTable A pointer to the EFI System Table.
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///
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/// @retval EFI_SUCCESS The entry point is executed successfully.
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/// @retval other Some error occurs when executing this entry point.
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EFI_STATUS
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EFIAPI
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UefiMain(IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable)
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{
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OverrideFunctions ();
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return EFI_SUCCESS;
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}
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// OverrideFunctions
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/// Overrides the original LoadImage function with the Fat Binary-compatible
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/// and saves a pointer to the old.
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///
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/// @retval EFI_SUCCESS The override is executed successfully.
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EFI_STATUS
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EFIAPI
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OverrideFunctions()
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{
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OrigLoadImage = gBS->LoadImage;
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gBS->LoadImage = OvrLoadImage;
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gBS->Hdr.CRC32 = 0;
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gBS->CalculateCrc32(gBS, sizeof(EFI_BOOT_SERVICES), &gBS->Hdr.CRC32);
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return EFI_SUCCESS;
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}
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// OvrLoadImage
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/// Loads an EFI image into memory. Supports the Fat Binary format.
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///
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/// @param[in] BootPolicy If TRUE, indicates that the request originates from the boot
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/// manager, and that the boot manager is attempting to load
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/// FilePath as a boot selection. Ignored if SourceBuffer is
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/// not NULL.
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/// @param[in] ParentImageHandle The caller's image handle.
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/// @param[in] DevicePath The DeviceHandle specific file path from which the image is
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/// loaded.
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/// @param[in] SourceBuffer If not NULL, a pointer to the memory location containing a copy
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/// of the image to be loaded.
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/// @param[in] SourceSize The size in bytes of SourceBuffer. Ignored if SourceBuffer is NULL.
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/// @param[out] ImageHandle The pointer to the returned image handle that is created when the
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/// image is successfully loaded.
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///
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/// @retval EFI_SUCCESS Image was loaded into memory correctly.
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/// @retval EFI_NOT_FOUND Both SourceBuffer and DevicePath are NULL.
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/// @retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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/// @retval EFI_UNSUPPORTED The image type is not supported.
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/// @retval EFI_OUT_OF_RESOURCES Image was not loaded due to insufficient resources.
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/// @retval EFI_LOAD_ERROR Image was not loaded because the image format was corrupt or not
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/// understood.
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/// @retval EFI_DEVICE_ERROR Image was not loaded because the device returned a read error.
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/// @retval EFI_ACCESS_DENIED Image was not loaded because the platform policy prohibits the
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/// image from being loaded. NULL is returned in *ImageHandle.
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/// @retval EFI_SECURITY_VIOLATION Image was loaded and an ImageHandle was created with a
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/// valid EFI_LOADED_IMAGE_PROTOCOL. However, the current
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/// platform policy specifies that the image should not be started.
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EFI_STATUS
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EFIAPI
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OvrLoadImage(IN BOOLEAN BootPolicy,
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IN EFI_HANDLE ParentImageHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
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IN VOID *SourceBuffer OPTIONAL,
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IN UINTN SourceSize,
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OUT EFI_HANDLE *ImageHandle)
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{
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EFI_STATUS Status;
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EFI_STATUS Status2;
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FAT_HEADER *FatHeader;
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FAT_ARCH *FatArch;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;
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EFI_LOAD_FILE_PROTOCOL *LoadFile;
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VOID *SrcBuffer;
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BOOLEAN FreeSourceBuffer;
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BOOLEAN FreeSrcBuffer;
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EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
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EFI_HANDLE DeviceHandle;
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EFI_FILE_HANDLE FileHandle;
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EFI_FILE_HANDLE LastHandle;
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FILEPATH_DEVICE_PATH *FilePathNode;
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EFI_FILE_INFO *FileInfo;
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UINTN FileInfoSize;
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FILEPATH_DEVICE_PATH *OrigFilePathNode;
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UINT32 Index;
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EFI_LOADED_IMAGE_PROTOCOL *Image;
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FreeSourceBuffer = FALSE;
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RemainingDevicePath = NULL;
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DeviceHandle = 0;
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Status = EFI_INVALID_PARAMETER;
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while (SourceBuffer == NULL) {
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if (FilePath == NULL) {
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return Status;
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}
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// Attempt to access the file via a file system interface
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FilePathNode = (FILEPATH_DEVICE_PATH *)FilePath;
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Status = gBS->LocateDevicePath(&gEfiSimpleFileSystemProtocolGuid, (EFI_DEVICE_PATH_PROTOCOL **)&FilePathNode, &DeviceHandle);
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if (!EFI_ERROR(Status)) {
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RemainingDevicePath = (EFI_DEVICE_PATH_PROTOCOL *)FilePathNode;
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Status = gBS->HandleProtocol(DeviceHandle, &gEfiSimpleFileSystemProtocolGuid, (VOID**)&Volume);
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if (!EFI_ERROR(Status)) {
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// Open the volume to get the File System handle
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Status = Volume->OpenVolume(Volume, &FileHandle);
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if (!EFI_ERROR(Status)) {
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//
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// Duplicate the device path to avoid the access to unaligned device path node.
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// Because the device path consists of one or more FILE_PATH_MEDIA_DEVICE_PATH
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// nodes, It assures the fields in device path nodes are 2 byte aligned.
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//
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FilePathNode = (FILEPATH_DEVICE_PATH *)DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL *)FilePathNode);
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if (FilePathNode == NULL) {
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FileHandle->Close(FileHandle);
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Status = EFI_OUT_OF_RESOURCES;
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} else {
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OrigFilePathNode = FilePathNode;
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//
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// Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the
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// directory information and filename can be separate. The goal is to inch
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// our way down each device path node and close the previous node
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//
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while (!IsDevicePathEnd(&FilePathNode->Header)) {
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if (DevicePathType(&FilePathNode->Header) != MEDIA_DEVICE_PATH ||
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DevicePathSubType(&FilePathNode->Header) != MEDIA_FILEPATH_DP) {
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Status = EFI_UNSUPPORTED;
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}
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if (EFI_ERROR(Status)) {
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break;
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}
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LastHandle = FileHandle;
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FileHandle = NULL;
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Status = LastHandle->Open(LastHandle, &FileHandle, FilePathNode->PathName, EFI_FILE_MODE_READ, 0);
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// Close the previous node
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LastHandle->Close(LastHandle);
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FilePathNode = (FILEPATH_DEVICE_PATH *)NextDevicePathNode(&FilePathNode->Header);
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}
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// Free the allocated memory pool
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gBS->FreePool(OrigFilePathNode);
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}
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if (!EFI_ERROR(Status)) {
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//
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// We have found the file. Now we need to read it. Before we can read the file we need to
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// figure out how big the file is.
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//
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FileInfo = NULL;
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FileInfoSize = 0;
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Status = FileHandle->GetInfo(FileHandle, &gEfiFileInfoGuid, &FileInfoSize, FileInfo);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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// inc size by 2 because some drivers (HFSPlus.efi) do not count 0 at the end of file name
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FileInfoSize += 2;
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gBS->AllocatePool(EfiBootServicesData, FileInfoSize, (VOID **)&FileInfo);
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if (FileInfo != NULL) {
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Status = FileHandle->GetInfo(FileHandle, &gEfiFileInfoGuid, &FileInfoSize, FileInfo);
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} else {
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Status = EFI_OUT_OF_RESOURCES;
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break;
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}
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}
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if (!EFI_ERROR(Status)) {
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// ASSERT(FileInfo != NULL);
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if (FileInfo == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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gBS->AllocatePool(EfiBootServicesData, (UINTN)FileInfo->FileSize, &SourceBuffer);
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if (SourceBuffer != NULL) {
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SourceSize = (UINTN)FileInfo->FileSize;
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FreeSourceBuffer = TRUE;
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Status = FileHandle->Read(FileHandle, &SourceSize, SourceBuffer);
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FileHandle->Close(FileHandle);
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gBS->FreePool(FileInfo);
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FileInfo = NULL; //FreePoll will not zero pointer
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} else {
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Status = EFI_OUT_OF_RESOURCES;
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}
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break;
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}
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}
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}
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}
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}
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//
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// Try LoadFile style
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//
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RemainingDevicePath = FilePath;
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Status = gBS->LocateDevicePath(&gEfiLoadFileProtocolGuid, &RemainingDevicePath, &DeviceHandle);
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if (!EFI_ERROR(Status)) {
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Status = gBS->HandleProtocol(DeviceHandle, &gEfiLoadFileProtocolGuid, (VOID**)&LoadFile);
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if (!EFI_ERROR(Status)) {
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// ASSERT(SourceSize == 0);
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// ASSERT(SourceBuffer == NULL);
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// Call LoadFile with the correct buffer size
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Status = LoadFile->LoadFile(LoadFile, RemainingDevicePath, BootPolicy, &SourceSize, SourceBuffer);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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gBS->AllocatePool(EfiBootServicesData, SourceSize, &SourceBuffer);
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Status = (SourceBuffer == NULL) ?
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EFI_OUT_OF_RESOURCES :
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LoadFile->LoadFile(LoadFile, RemainingDevicePath, BootPolicy, &SourceSize, SourceBuffer);
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}
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if (!EFI_ERROR(Status)) {
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FreeSourceBuffer = TRUE;
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break;
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}
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}
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}
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break;
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} // while
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SrcBuffer = NULL;
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FreeSrcBuffer = FALSE;
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if (SourceBuffer != NULL) {
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FatHeader = (FAT_HEADER *)SourceBuffer;
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if (FatHeader->Magic == FAT_BINARY_MAGIC) {
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FatArch = (FAT_ARCH *)(FatHeader + 1);
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for (Index = 0; Index < FatHeader->NumFatArch; Index++, FatArch++) {
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#if defined(EFI32) || defined(MDE_CPU_IA32)
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if (FatArch->CpuType == CPU_TYPE_X86 && FatArch->CpuSubtype == CPU_SUBTYPE_I386_ALL)
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#elif defined(EFIX64) || defined(MDE_CPU_X64)
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if (FatArch->CpuType == CPU_TYPE_X86_64 && FatArch->CpuSubtype == CPU_SUBTYPE_I386_ALL)
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#else
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#error "Undefined Platform"
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#endif
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{
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break;
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}
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}
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SourceSize = FatArch->Size;
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gBS->AllocatePool(EfiBootServicesData, SourceSize, &SrcBuffer);
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// ASSERT(SrcBuffer != NULL);
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if (SrcBuffer == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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CopyMem(SrcBuffer, (UINT8 *)SourceBuffer + FatArch->Offset, SourceSize);
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FreeSrcBuffer = TRUE;
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} else {
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SrcBuffer = SourceBuffer;
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}
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}
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Status = OrigLoadImage(BootPolicy, ParentImageHandle, FilePath, SrcBuffer, SourceSize, ImageHandle);
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if (FreeSrcBuffer && SrcBuffer) {
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gBS->FreePool(SrcBuffer);
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}
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if (FreeSourceBuffer && SourceBuffer) {
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gBS->FreePool(SourceBuffer);
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}
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if (FileInfo) {
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gBS->FreePool(FileInfo);
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}
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//
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// dmazar: some boards do not put device handle to EfiLoadedImageProtocol->DeviceHandle
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// when image is loaded from SrcBuffer, and then boot.efi fails.
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// we'll fix EfiLoadedImageProtocol here.
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//
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if (!EFI_ERROR(Status) && DeviceHandle != 0) {
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Status2 = gBS->OpenProtocol(
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*ImageHandle,
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&gEfiLoadedImageProtocolGuid,
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(VOID **)&Image,
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gImageHandle,
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NULL,
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EFI_OPEN_PROTOCOL_GET_PROTOCOL
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);
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if (!EFI_ERROR(Status2) && Image->DeviceHandle != DeviceHandle) {
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Image->DeviceHandle = DeviceHandle;
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Image->FilePath = DuplicateDevicePath(RemainingDevicePath);
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}
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}
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return Status;
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}
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