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audk/MdeModulePkg/Core/Dxe/Image/Image.c

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/** @file
Core image handling services to load and unload PeImage.
Copyright (c) 2006 - 2008, Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "DxeMain.h"
#include "Image.h"
//
// Module Globals
//
LOADED_IMAGE_PRIVATE_DATA *mCurrentImage = NULL;
LOAD_PE32_IMAGE_PRIVATE_DATA mLoadPe32PrivateData = {
LOAD_PE32_IMAGE_PRIVATE_DATA_SIGNATURE,
NULL,
{
CoreLoadImageEx,
CoreUnloadImageEx
}
};
//
// This code is needed to build the Image handle for the DXE Core
//
LOADED_IMAGE_PRIVATE_DATA mCorePrivateImage = {
LOADED_IMAGE_PRIVATE_DATA_SIGNATURE, // Signature
NULL, // Image handle
EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER, // Image type
TRUE, // If entrypoint has been called
NULL, // EntryPoint
{
EFI_LOADED_IMAGE_INFORMATION_REVISION, // Revision
NULL, // Parent handle
NULL, // System handle
NULL, // Device handle
NULL, // File path
NULL, // Reserved
0, // LoadOptionsSize
NULL, // LoadOptions
NULL, // ImageBase
0, // ImageSize
EfiBootServicesCode, // ImageCodeType
EfiBootServicesData // ImageDataType
},
(EFI_PHYSICAL_ADDRESS)0, // ImageBasePage
0, // NumberOfPages
NULL, // FixupData
0, // Tpl
EFI_SUCCESS, // Status
0, // ExitDataSize
NULL, // ExitData
NULL, // JumpBuffer
NULL, // JumpContext
0, // Machine
NULL, // Ebc
NULL, // RuntimeData
NULL // LoadedImageDevicePath
};
/**
Add the Image Services to EFI Boot Services Table and install the protocol
interfaces for this image.
@param HobStart The HOB to initialize
@return Status code.
**/
EFI_STATUS
CoreInitializeImageServices (
IN VOID *HobStart
)
{
EFI_STATUS Status;
LOADED_IMAGE_PRIVATE_DATA *Image;
EFI_PHYSICAL_ADDRESS DxeCoreImageBaseAddress;
UINT64 DxeCoreImageLength;
VOID *DxeCoreEntryPoint;
EFI_PEI_HOB_POINTERS DxeCoreHob;
//
// Searching for image hob
//
DxeCoreHob.Raw = HobStart;
while ((DxeCoreHob.Raw = GetNextHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, DxeCoreHob.Raw)) != NULL) {
if (CompareGuid (&DxeCoreHob.MemoryAllocationModule->MemoryAllocationHeader.Name, &gEfiHobMemoryAllocModuleGuid)) {
//
// Find Dxe Core HOB
//
break;
}
DxeCoreHob.Raw = GET_NEXT_HOB (DxeCoreHob);
}
ASSERT (DxeCoreHob.Raw != NULL);
DxeCoreImageBaseAddress = DxeCoreHob.MemoryAllocationModule->MemoryAllocationHeader.MemoryBaseAddress;
DxeCoreImageLength = DxeCoreHob.MemoryAllocationModule->MemoryAllocationHeader.MemoryLength;
DxeCoreEntryPoint = (VOID *) (UINTN) DxeCoreHob.MemoryAllocationModule->EntryPoint;
gDxeCoreFileName = &DxeCoreHob.MemoryAllocationModule->ModuleName;
//
// Initialize the fields for an internal driver
//
Image = &mCorePrivateImage;
Image->EntryPoint = (EFI_IMAGE_ENTRY_POINT)(UINTN)DxeCoreEntryPoint;
Image->ImageBasePage = DxeCoreImageBaseAddress;
Image->NumberOfPages = (UINTN)(EFI_SIZE_TO_PAGES((UINTN)(DxeCoreImageLength)));
Image->Tpl = gEfiCurrentTpl;
Image->Info.SystemTable = gDxeCoreST;
Image->Info.ImageBase = (VOID *)(UINTN)DxeCoreImageBaseAddress;
Image->Info.ImageSize = DxeCoreImageLength;
//
// Install the protocol interfaces for this image
//
Status = CoreInstallProtocolInterface (
&Image->Handle,
&gEfiLoadedImageProtocolGuid,
EFI_NATIVE_INTERFACE,
&Image->Info
);
ASSERT_EFI_ERROR (Status);
mCurrentImage = Image;
//
// Fill in DXE globals
//
gDxeCoreImageHandle = Image->Handle;
gDxeCoreLoadedImage = &Image->Info;
//
// Export DXE Core PE Loader functionality
//
return CoreInstallProtocolInterface (
&mLoadPe32PrivateData.Handle,
&gEfiLoadPeImageProtocolGuid,
EFI_NATIVE_INTERFACE,
&mLoadPe32PrivateData.Pe32Image
);
}
/**
Loads, relocates, and invokes a PE/COFF image
@param BootPolicy If TRUE, indicates that the request originates
from the boot manager, and that the boot
manager is attempting to load FilePath as a
boot selection.
@param Pe32Handle The handle of PE32 image
@param Image PE image to be loaded
@param DstBuffer The buffer to store the image
@param EntryPoint A pointer to the entry point
@param Attribute The bit mask of attributes to set for the load
PE image
@retval EFI_SUCCESS The file was loaded, relocated, and invoked
@retval EFI_OUT_OF_RESOURCES There was not enough memory to load and
relocate the PE/COFF file
@retval EFI_INVALID_PARAMETER Invalid parameter
@retval EFI_BUFFER_TOO_SMALL Buffer for image is too small
**/
EFI_STATUS
CoreLoadPeImage (
IN BOOLEAN BootPolicy,
IN VOID *Pe32Handle,
IN LOADED_IMAGE_PRIVATE_DATA *Image,
IN EFI_PHYSICAL_ADDRESS DstBuffer OPTIONAL,
OUT EFI_PHYSICAL_ADDRESS *EntryPoint OPTIONAL,
IN UINT32 Attribute
)
{
EFI_STATUS Status;
BOOLEAN DstBufAlocated;
UINTN Size;
UINTN LinkTimeBase;
EFI_TCG_PLATFORM_PROTOCOL *TcgPlatformProtocol;
IMAGE_FILE_HANDLE *FHandle;
FHandle = NULL;
ZeroMem (&Image->ImageContext, sizeof (Image->ImageContext));
Image->ImageContext.Handle = Pe32Handle;
Image->ImageContext.ImageRead = (PE_COFF_LOADER_READ_FILE)CoreReadImageFile;
//
// Get information about the image being loaded
//
Status = PeCoffLoaderGetImageInfo (&Image->ImageContext);
if (EFI_ERROR (Status)) {
return Status;
}
if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (Image->ImageContext.Machine)) {
if (!EFI_IMAGE_MACHINE_CROSS_TYPE_SUPPORTED (Image->ImageContext.Machine)) {
//
// The PE/COFF loader can support loading image types that can be executed.
// If we loaded an image type that we can not execute return EFI_UNSUPORTED.
//
return EFI_UNSUPPORTED;
}
}
//
// Set EFI memory type based on ImageType
//
switch (Image->ImageContext.ImageType) {
case EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION:
Image->ImageContext.ImageCodeMemoryType = EfiLoaderCode;
Image->ImageContext.ImageDataMemoryType = EfiLoaderData;
break;
case EFI_IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER:
Image->ImageContext.ImageCodeMemoryType = EfiBootServicesCode;
Image->ImageContext.ImageDataMemoryType = EfiBootServicesData;
break;
case EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER:
case EFI_IMAGE_SUBSYSTEM_SAL_RUNTIME_DRIVER:
Image->ImageContext.ImageCodeMemoryType = EfiRuntimeServicesCode;
Image->ImageContext.ImageDataMemoryType = EfiRuntimeServicesData;
break;
default:
Image->ImageContext.ImageError = IMAGE_ERROR_INVALID_SUBSYSTEM;
return EFI_UNSUPPORTED;
}
//
// Get the image base address in the original PeImage.
//
LinkTimeBase = (UINTN) Image->ImageContext.ImageAddress;
//
// Allocate memory of the correct memory type aligned on the required image boundry
//
DstBufAlocated = FALSE;
if (DstBuffer == 0) {
//
// Allocate Destination Buffer as caller did not pass it in
//
if (Image->ImageContext.SectionAlignment > EFI_PAGE_SIZE) {
Size = (UINTN)Image->ImageContext.ImageSize + Image->ImageContext.SectionAlignment;
} else {
Size = (UINTN)Image->ImageContext.ImageSize;
}
Image->NumberOfPages = EFI_SIZE_TO_PAGES (Size);
//
// If the image relocations have not been stripped, then load at any address.
// Otherwise load at the address at which it was linked.
//
// Memory below 1MB should be treated reserved for CSM and there should be
// no modules whose preferred load addresses are below 1MB.
//
Status = EFI_OUT_OF_RESOURCES;
if (Image->ImageContext.ImageAddress >= 0x100000 || Image->ImageContext.RelocationsStripped) {
Status = CoreAllocatePages (
AllocateAddress,
(EFI_MEMORY_TYPE) (Image->ImageContext.ImageCodeMemoryType),
Image->NumberOfPages,
&Image->ImageContext.ImageAddress
);
}
if (EFI_ERROR (Status) && !Image->ImageContext.RelocationsStripped) {
Status = CoreAllocatePages (
AllocateAnyPages,
(EFI_MEMORY_TYPE) (Image->ImageContext.ImageCodeMemoryType),
Image->NumberOfPages,
&Image->ImageContext.ImageAddress
);
}
if (EFI_ERROR (Status)) {
return Status;
}
DstBufAlocated = TRUE;
} else {
//
// Caller provided the destination buffer
//
if (Image->ImageContext.RelocationsStripped && (Image->ImageContext.ImageAddress != DstBuffer)) {
//
// If the image relocations were stripped, and the caller provided a
// destination buffer address that does not match the address that the
// image is linked at, then the image cannot be loaded.
//
return EFI_INVALID_PARAMETER;
}
if (Image->NumberOfPages != 0 &&
Image->NumberOfPages <
(EFI_SIZE_TO_PAGES ((UINTN)Image->ImageContext.ImageSize + Image->ImageContext.SectionAlignment))) {
Image->NumberOfPages = EFI_SIZE_TO_PAGES ((UINTN)Image->ImageContext.ImageSize + Image->ImageContext.SectionAlignment);
return EFI_BUFFER_TOO_SMALL;
}
Image->NumberOfPages = EFI_SIZE_TO_PAGES ((UINTN)Image->ImageContext.ImageSize + Image->ImageContext.SectionAlignment);
Image->ImageContext.ImageAddress = DstBuffer;
}
Image->ImageBasePage = Image->ImageContext.ImageAddress;
if (!Image->ImageContext.IsTeImage) {
Image->ImageContext.ImageAddress =
(Image->ImageContext.ImageAddress + Image->ImageContext.SectionAlignment - 1) &
~((UINTN)Image->ImageContext.SectionAlignment - 1);
}
//
// Load the image from the file into the allocated memory
//
Status = PeCoffLoaderLoadImage (&Image->ImageContext);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// If this is a Runtime Driver, then allocate memory for the FixupData that
// is used to relocate the image when SetVirtualAddressMap() is called. The
// relocation is done by the Runtime AP.
//
if ((Attribute & EFI_LOAD_PE_IMAGE_ATTRIBUTE_RUNTIME_REGISTRATION) != 0) {
if (Image->ImageContext.ImageType == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER) {
Image->ImageContext.FixupData = AllocateRuntimePool ((UINTN)(Image->ImageContext.FixupDataSize));
if (Image->ImageContext.FixupData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
}
}
//
// Measure the image before applying fixup
//
Status = CoreLocateProtocol (
&gEfiTcgPlatformProtocolGuid,
NULL,
(VOID **) &TcgPlatformProtocol
);
if (!EFI_ERROR (Status)) {
FHandle = (IMAGE_FILE_HANDLE *) Image->ImageContext.Handle;
Status = TcgPlatformProtocol->MeasurePeImage (
BootPolicy,
(EFI_PHYSICAL_ADDRESS) (UINTN) FHandle->Source,
FHandle->SourceSize,
LinkTimeBase,
Image->ImageContext.ImageType,
Image->Info.DeviceHandle,
Image->Info.FilePath
);
ASSERT_EFI_ERROR (Status);
}
//
// Relocate the image in memory
//
Status = PeCoffLoaderRelocateImage (&Image->ImageContext);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Flush the Instruction Cache
//
InvalidateInstructionCacheRange ((VOID *)(UINTN)Image->ImageContext.ImageAddress, (UINTN)Image->ImageContext.ImageSize);
//
// Copy the machine type from the context to the image private data. This
// is needed during image unload to know if we should call an EBC protocol
// to unload the image.
//
Image->Machine = Image->ImageContext.Machine;
//
// Get the image entry point. If it's an EBC image, then call into the
// interpreter to create a thunk for the entry point and use the returned
// value for the entry point.
//
Image->EntryPoint = (EFI_IMAGE_ENTRY_POINT)(UINTN)Image->ImageContext.EntryPoint;
if (Image->ImageContext.Machine == EFI_IMAGE_MACHINE_EBC) {
//
// Locate the EBC interpreter protocol
//
Status = CoreLocateProtocol (&gEfiEbcProtocolGuid, NULL, (VOID **)&Image->Ebc);
if (EFI_ERROR(Status)) {
DEBUG ((DEBUG_LOAD | DEBUG_ERROR, "CoreLoadPeImage: There is no EBC interpreter for an EBC image.\n"));
goto Done;
}
//
// Register a callback for flushing the instruction cache so that created
// thunks can be flushed.
//
Status = Image->Ebc->RegisterICacheFlush (Image->Ebc, (EBC_ICACHE_FLUSH)InvalidateInstructionCacheRange);
if (EFI_ERROR(Status)) {
goto Done;
}
//
// Create a thunk for the image's entry point. This will be the new
// entry point for the image.
//
Status = Image->Ebc->CreateThunk (
Image->Ebc,
Image->Handle,
(VOID *)(UINTN) Image->ImageContext.EntryPoint,
(VOID **) &Image->EntryPoint
);
if (EFI_ERROR(Status)) {
goto Done;
}
}
//
// Fill in the image information for the Loaded Image Protocol
//
Image->Type = Image->ImageContext.ImageType;
Image->Info.ImageBase = (VOID *)(UINTN)Image->ImageContext.ImageAddress;
Image->Info.ImageSize = Image->ImageContext.ImageSize;
Image->Info.ImageCodeType = (EFI_MEMORY_TYPE) (Image->ImageContext.ImageCodeMemoryType);
Image->Info.ImageDataType = (EFI_MEMORY_TYPE) (Image->ImageContext.ImageDataMemoryType);
if ((Attribute & EFI_LOAD_PE_IMAGE_ATTRIBUTE_RUNTIME_REGISTRATION) != 0) {
if (Image->ImageContext.ImageType == EFI_IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER) {
//
// Make a list off all the RT images so we can let the RT AP know about them.
//
Image->RuntimeData = AllocateRuntimePool (sizeof(EFI_RUNTIME_IMAGE_ENTRY));
if (Image->RuntimeData == NULL) {
goto Done;
}
Image->RuntimeData->ImageBase = Image->Info.ImageBase;
Image->RuntimeData->ImageSize = (UINT64) (Image->Info.ImageSize);
Image->RuntimeData->RelocationData = Image->ImageContext.FixupData;
Image->RuntimeData->Handle = Image->Handle;
InsertTailList (&gRuntime->ImageHead, &Image->RuntimeData->Link);
}
}
//
// Fill in the entry point of the image if it is available
//
if (EntryPoint != NULL) {
*EntryPoint = Image->ImageContext.EntryPoint;
}
//
// Print the load address and the PDB file name if it is available
//
DEBUG_CODE_BEGIN ();
UINTN Index;
UINTN StartIndex;
CHAR8 EfiFileName[256];
DEBUG ((DEBUG_INFO | DEBUG_LOAD,
"Loading driver at 0x%11p EntryPoint=0x%11p ",
(VOID *)(UINTN) Image->ImageContext.ImageAddress,
FUNCTION_ENTRY_POINT (Image->ImageContext.EntryPoint)));
//
// Print Module Name by Pdb file path
//
if (Image->ImageContext.PdbPointer != NULL) {
StartIndex = 0;
for (Index = 0; Image->ImageContext.PdbPointer[Index] != 0; Index++) {
if (Image->ImageContext.PdbPointer[Index] == '\\') {
StartIndex = Index + 1;
}
}
//
// Copy the PDB file name to our temporary string, and replace .pdb with .efi
//
for (Index = 0; Index < sizeof (EfiFileName); Index++) {
EfiFileName[Index] = Image->ImageContext.PdbPointer[Index + StartIndex];
if (EfiFileName[Index] == 0) {
EfiFileName[Index] = '.';
}
if (EfiFileName[Index] == '.') {
EfiFileName[Index + 1] = 'e';
EfiFileName[Index + 2] = 'f';
EfiFileName[Index + 3] = 'i';
EfiFileName[Index + 4] = 0;
break;
}
}
DEBUG ((DEBUG_INFO | DEBUG_LOAD, "%a", EfiFileName)); // &Image->ImageContext.PdbPointer[StartIndex]));
}
DEBUG ((DEBUG_INFO | DEBUG_LOAD, "\n"));
DEBUG_CODE_END ();
return EFI_SUCCESS;
Done:
//
// Free memory.
//
if (DstBufAlocated) {
CoreFreePages (Image->ImageContext.ImageAddress, Image->NumberOfPages);
}
if (Image->ImageContext.FixupData != NULL) {
CoreFreePool (Image->ImageContext.FixupData);
}
return Status;
}
/**
Get the image's private data from its handle.
@param ImageHandle The image handle
@return Return the image private data associated with ImageHandle.
**/
LOADED_IMAGE_PRIVATE_DATA *
CoreLoadedImageInfo (
IN EFI_HANDLE ImageHandle
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
LOADED_IMAGE_PRIVATE_DATA *Image;
Status = CoreHandleProtocol (
ImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **)&LoadedImage
);
if (!EFI_ERROR (Status)) {
Image = LOADED_IMAGE_PRIVATE_DATA_FROM_THIS (LoadedImage);
} else {
DEBUG ((DEBUG_LOAD, "CoreLoadedImageInfo: Not an ImageHandle %p\n", ImageHandle));
Image = NULL;
}
return Image;
}
/**
Unloads EFI image from memory.
@param Image EFI image
@param FreePage Free allocated pages
**/
VOID
CoreUnloadAndCloseImage (
IN LOADED_IMAGE_PRIVATE_DATA *Image,
IN BOOLEAN FreePage
)
{
EFI_STATUS Status;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
UINTN HandleIndex;
EFI_GUID **ProtocolGuidArray;
UINTN ArrayCount;
UINTN ProtocolIndex;
EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfo;
UINTN OpenInfoCount;
UINTN OpenInfoIndex;
if (Image->Ebc != NULL) {
//
// If EBC protocol exists we must perform cleanups for this image.
//
Image->Ebc->UnloadImage (Image->Ebc, Image->Handle);
}
//
// Unload image, free Image->ImageContext->ModHandle
//
PeCoffLoaderUnloadImage (&Image->ImageContext);
//
// Free our references to the image handle
//
if (Image->Handle != NULL) {
Status = CoreLocateHandleBuffer (
AllHandles,
NULL,
NULL,
&HandleCount,
&HandleBuffer
);
if (!EFI_ERROR (Status)) {
for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
Status = CoreProtocolsPerHandle (
HandleBuffer[HandleIndex],
&ProtocolGuidArray,
&ArrayCount
);
if (!EFI_ERROR (Status)) {
for (ProtocolIndex = 0; ProtocolIndex < ArrayCount; ProtocolIndex++) {
Status = CoreOpenProtocolInformation (
HandleBuffer[HandleIndex],
ProtocolGuidArray[ProtocolIndex],
&OpenInfo,
&OpenInfoCount
);
if (!EFI_ERROR (Status)) {
for (OpenInfoIndex = 0; OpenInfoIndex < OpenInfoCount; OpenInfoIndex++) {
if (OpenInfo[OpenInfoIndex].AgentHandle == Image->Handle) {
Status = CoreCloseProtocol (
HandleBuffer[HandleIndex],
ProtocolGuidArray[ProtocolIndex],
Image->Handle,
OpenInfo[OpenInfoIndex].ControllerHandle
);
}
}
if (OpenInfo != NULL) {
CoreFreePool(OpenInfo);
}
}
}
if (ProtocolGuidArray != NULL) {
CoreFreePool(ProtocolGuidArray);
}
}
}
if (HandleBuffer != NULL) {
CoreFreePool (HandleBuffer);
}
}
CoreRemoveDebugImageInfoEntry (Image->Handle);
Status = CoreUninstallProtocolInterface (
Image->Handle,
&gEfiLoadedImageDevicePathProtocolGuid,
Image->LoadedImageDevicePath
);
Status = CoreUninstallProtocolInterface (
Image->Handle,
&gEfiLoadedImageProtocolGuid,
&Image->Info
);
}
if (Image->RuntimeData != NULL) {
if (Image->RuntimeData->Link.ForwardLink != NULL) {
//
// Remove the Image from the Runtime Image list as we are about to Free it!
//
RemoveEntryList (&Image->RuntimeData->Link);
}
CoreFreePool (Image->RuntimeData);
}
//
// Free the Image from memory
//
if ((Image->ImageBasePage != 0) && FreePage) {
CoreFreePages (Image->ImageBasePage, Image->NumberOfPages);
}
//
// Done with the Image structure
//
if (Image->Info.FilePath != NULL) {
CoreFreePool (Image->Info.FilePath);
}
if (Image->LoadedImageDevicePath != NULL) {
CoreFreePool (Image->LoadedImageDevicePath);
}
if (Image->FixupData != NULL) {
CoreFreePool (Image->FixupData);
}
CoreFreePool (Image);
}
/**
Loads an EFI image into memory and returns a handle to the image.
@param BootPolicy If TRUE, indicates that the request originates
from the boot manager, and that the boot
manager is attempting to load FilePath as a
boot selection.
@param ParentImageHandle The caller's image handle.
@param FilePath The specific file path from which the image is
loaded.
@param SourceBuffer If not NULL, a pointer to the memory location
containing a copy of the image to be loaded.
@param SourceSize The size in bytes of SourceBuffer.
@param DstBuffer The buffer to store the image
@param NumberOfPages If not NULL, it inputs a pointer to the page
number of DstBuffer and outputs a pointer to
the page number of the image. If this number is
not enough, return EFI_BUFFER_TOO_SMALL and
this parameter contains the required number.
@param ImageHandle Pointer to the returned image handle that is
created when the image is successfully loaded.
@param EntryPoint A pointer to the entry point
@param Attribute The bit mask of attributes to set for the load
PE image
@retval EFI_SUCCESS The image was loaded into memory.
@retval EFI_NOT_FOUND The FilePath was not found.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_BUFFER_TOO_SMALL The buffer is too small
@retval EFI_UNSUPPORTED The image type is not supported, or the device
path cannot be parsed to locate the proper
protocol for loading the file.
@retval EFI_OUT_OF_RESOURCES Image was not loaded due to insufficient
resources.
**/
EFI_STATUS
CoreLoadImageCommon (
IN BOOLEAN BootPolicy,
IN EFI_HANDLE ParentImageHandle,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN VOID *SourceBuffer OPTIONAL,
IN UINTN SourceSize,
IN EFI_PHYSICAL_ADDRESS DstBuffer OPTIONAL,
IN OUT UINTN *NumberOfPages OPTIONAL,
OUT EFI_HANDLE *ImageHandle,
OUT EFI_PHYSICAL_ADDRESS *EntryPoint OPTIONAL,
IN UINT32 Attribute
)
{
LOADED_IMAGE_PRIVATE_DATA *Image;
LOADED_IMAGE_PRIVATE_DATA *ParentImage;
IMAGE_FILE_HANDLE FHand;
EFI_STATUS Status;
EFI_STATUS SecurityStatus;
EFI_HANDLE DeviceHandle;
UINT32 AuthenticationStatus;
EFI_DEVICE_PATH_PROTOCOL *OriginalFilePath;
EFI_DEVICE_PATH_PROTOCOL *HandleFilePath;
UINTN FilePathSize;
SecurityStatus = EFI_SUCCESS;
ASSERT (gEfiCurrentTpl < TPL_NOTIFY);
ParentImage = NULL;
//
// The caller must pass in a valid ParentImageHandle
//
if (ImageHandle == NULL || ParentImageHandle == NULL) {
return EFI_INVALID_PARAMETER;
}
ParentImage = CoreLoadedImageInfo (ParentImageHandle);
if (ParentImage == NULL) {
DEBUG((DEBUG_LOAD|DEBUG_ERROR, "LoadImageEx: Parent handle not an image handle\n"));
return EFI_INVALID_PARAMETER;
}
//
// Get simple read access to the source file
//
OriginalFilePath = FilePath;
Status = CoreOpenImageFile (
BootPolicy,
SourceBuffer,
SourceSize,
&FilePath,
&DeviceHandle,
&FHand,
&AuthenticationStatus
);
if (Status == EFI_ALREADY_STARTED) {
Image = NULL;
goto Done;
} else if (EFI_ERROR (Status)) {
return Status;
}
//
// Verify the Authentication Status through the Security Architectural Protocol
//
if ((gSecurity != NULL) && (OriginalFilePath != NULL)) {
SecurityStatus = gSecurity->FileAuthenticationState (
gSecurity,
AuthenticationStatus,
OriginalFilePath
);
if (EFI_ERROR (SecurityStatus) && SecurityStatus != EFI_SECURITY_VIOLATION) {
Status = SecurityStatus;
Image = NULL;
goto Done;
}
}
//
// Allocate a new image structure
//
Image = AllocateZeroPool (sizeof(LOADED_IMAGE_PRIVATE_DATA));
if (Image == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Pull out just the file portion of the DevicePath for the LoadedImage FilePath
//
FilePath = OriginalFilePath;
Status = CoreHandleProtocol (DeviceHandle, &gEfiDevicePathProtocolGuid, (VOID **)&HandleFilePath);
if (!EFI_ERROR (Status)) {
FilePathSize = GetDevicePathSize (HandleFilePath) - sizeof(EFI_DEVICE_PATH_PROTOCOL);
FilePath = (EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *)FilePath) + FilePathSize );
}
//
// Initialize the fields for an internal driver
//
Image->Signature = LOADED_IMAGE_PRIVATE_DATA_SIGNATURE;
Image->Info.SystemTable = gDxeCoreST;
Image->Info.DeviceHandle = DeviceHandle;
Image->Info.Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;
Image->Info.FilePath = DuplicateDevicePath (FilePath);
Image->Info.ParentHandle = ParentImageHandle;
if (NumberOfPages != NULL) {
Image->NumberOfPages = *NumberOfPages ;
} else {
Image->NumberOfPages = 0 ;
}
//
// Install the protocol interfaces for this image
// don't fire notifications yet
//
Status = CoreInstallProtocolInterfaceNotify (
&Image->Handle,
&gEfiLoadedImageProtocolGuid,
EFI_NATIVE_INTERFACE,
&Image->Info,
FALSE
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Load the image. If EntryPoint is Null, it will not be set.
//
Status = CoreLoadPeImage (BootPolicy, &FHand, Image, DstBuffer, EntryPoint, Attribute);
if (EFI_ERROR (Status)) {
if ((Status == EFI_BUFFER_TOO_SMALL) || (Status == EFI_OUT_OF_RESOURCES)) {
if (NumberOfPages != NULL) {
*NumberOfPages = Image->NumberOfPages;
}
}
goto Done;
}
if (NumberOfPages != NULL) {
*NumberOfPages = Image->NumberOfPages;
}
//
// Register the image in the Debug Image Info Table if the attribute is set
//
if ((Attribute & EFI_LOAD_PE_IMAGE_ATTRIBUTE_DEBUG_IMAGE_INFO_TABLE_REGISTRATION) != 0) {
CoreNewDebugImageInfoEntry (EFI_DEBUG_IMAGE_INFO_TYPE_NORMAL, &Image->Info, Image->Handle);
}
//
//Reinstall loaded image protocol to fire any notifications
//
Status = CoreReinstallProtocolInterface (
Image->Handle,
&gEfiLoadedImageProtocolGuid,
&Image->Info,
&Image->Info
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// If DevicePath parameter to the LoadImage() is not NULL, then make a copy of DevicePath,
// otherwise Loaded Image Device Path Protocol is installed with a NULL interface pointer.
//
if (OriginalFilePath != NULL) {
Image->LoadedImageDevicePath = DuplicateDevicePath (OriginalFilePath);
}
//
// Install Loaded Image Device Path Protocol onto the image handle of a PE/COFE image
//
Status = CoreInstallProtocolInterface (
&Image->Handle,
&gEfiLoadedImageDevicePathProtocolGuid,
EFI_NATIVE_INTERFACE,
Image->LoadedImageDevicePath
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Success. Return the image handle
//
*ImageHandle = Image->Handle;
Done:
//
// All done accessing the source file
// If we allocated the Source buffer, free it
//
if (FHand.FreeBuffer) {
CoreFreePool (FHand.Source);
}
//
// There was an error. If there's an Image structure, free it
//
if (EFI_ERROR (Status)) {
if (Image != NULL) {
CoreUnloadAndCloseImage (Image, (BOOLEAN)(DstBuffer == 0));
*ImageHandle = NULL;
}
} else if (EFI_ERROR (SecurityStatus)) {
Status = SecurityStatus;
}
return Status;
}
/**
Loads an EFI image into memory and returns a handle to the image.
@param BootPolicy If TRUE, indicates that the request originates
from the boot manager, and that the boot
manager is attempting to load FilePath as a
boot selection.
@param ParentImageHandle The caller's image handle.
@param FilePath The specific file path from which the image is
loaded.
@param SourceBuffer If not NULL, a pointer to the memory location
containing a copy of the image to be loaded.
@param SourceSize The size in bytes of SourceBuffer.
@param ImageHandle Pointer to the returned image handle that is
created when the image is successfully loaded.
@retval EFI_SUCCESS The image was loaded into memory.
@retval EFI_NOT_FOUND The FilePath was not found.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED The image type is not supported, or the device
path cannot be parsed to locate the proper
protocol for loading the file.
@retval EFI_OUT_OF_RESOURCES Image was not loaded due to insufficient
resources.
**/
EFI_STATUS
EFIAPI
CoreLoadImage (
IN BOOLEAN BootPolicy,
IN EFI_HANDLE ParentImageHandle,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN VOID *SourceBuffer OPTIONAL,
IN UINTN SourceSize,
OUT EFI_HANDLE *ImageHandle
)
{
EFI_STATUS Status;
UINT64 Tick;
Tick = 0;
PERF_CODE (
Tick = GetPerformanceCounter ();
);
Status = CoreLoadImageCommon (
BootPolicy,
ParentImageHandle,
FilePath,
SourceBuffer,
SourceSize,
(EFI_PHYSICAL_ADDRESS) (UINTN) NULL,
NULL,
ImageHandle,
NULL,
EFI_LOAD_PE_IMAGE_ATTRIBUTE_RUNTIME_REGISTRATION | EFI_LOAD_PE_IMAGE_ATTRIBUTE_DEBUG_IMAGE_INFO_TABLE_REGISTRATION
);
PERF_START (*ImageHandle, LOAD_IMAGE_TOK, NULL, Tick);
PERF_END (*ImageHandle, LOAD_IMAGE_TOK, NULL, 0);
return Status;
}
/**
Loads an EFI image into memory and returns a handle to the image with extended parameters.
@param This Calling context
@param ParentImageHandle The caller's image handle.
@param FilePath The specific file path from which the image is
loaded.
@param SourceBuffer If not NULL, a pointer to the memory location
containing a copy of the image to be loaded.
@param SourceSize The size in bytes of SourceBuffer.
@param DstBuffer The buffer to store the image.
@param NumberOfPages For input, specifies the space size of the
image by caller if not NULL. For output,
specifies the actual space size needed.
@param ImageHandle Image handle for output.
@param EntryPoint Image entry point for output.
@param Attribute The bit mask of attributes to set for the load
PE image.
@retval EFI_SUCCESS The image was loaded into memory.
@retval EFI_NOT_FOUND The FilePath was not found.
@retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.
@retval EFI_UNSUPPORTED The image type is not supported, or the device
path cannot be parsed to locate the proper
protocol for loading the file.
@retval EFI_OUT_OF_RESOURCES Image was not loaded due to insufficient
resources.
**/
EFI_STATUS
EFIAPI
CoreLoadImageEx (
IN EFI_PE32_IMAGE_PROTOCOL *This,
IN EFI_HANDLE ParentImageHandle,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN VOID *SourceBuffer OPTIONAL,
IN UINTN SourceSize,
IN EFI_PHYSICAL_ADDRESS DstBuffer OPTIONAL,
OUT UINTN *NumberOfPages OPTIONAL,
OUT EFI_HANDLE *ImageHandle,
OUT EFI_PHYSICAL_ADDRESS *EntryPoint OPTIONAL,
IN UINT32 Attribute
)
{
return CoreLoadImageCommon (
TRUE,
ParentImageHandle,
FilePath,
SourceBuffer,
SourceSize,
DstBuffer,
NumberOfPages,
ImageHandle,
EntryPoint,
Attribute
);
}
/**
Transfer control to a loaded image's entry point.
@param ImageHandle Handle of image to be started.
@param ExitDataSize Pointer of the size to ExitData
@param ExitData Pointer to a pointer to a data buffer that
includes a Null-terminated Unicode string,
optionally followed by additional binary data.
The string is a description that the caller may
use to further indicate the reason for the
image's exit.
@retval EFI_INVALID_PARAMETER Invalid parameter
@retval EFI_OUT_OF_RESOURCES No enough buffer to allocate
@retval EFI_SUCCESS Successfully transfer control to the image's
entry point.
**/
EFI_STATUS
EFIAPI
CoreStartImage (
IN EFI_HANDLE ImageHandle,
OUT UINTN *ExitDataSize,
OUT CHAR16 **ExitData OPTIONAL
)
{
EFI_STATUS Status;
LOADED_IMAGE_PRIVATE_DATA *Image;
LOADED_IMAGE_PRIVATE_DATA *LastImage;
UINT64 HandleDatabaseKey;
UINTN SetJumpFlag;
Image = CoreLoadedImageInfo (ImageHandle);
if (Image == NULL || Image->Started) {
return EFI_INVALID_PARAMETER;
}
//
// Don't profile Objects or invalid start requests
//
PERF_START (ImageHandle, START_IMAGE_TOK, NULL, 0);
//
// Push the current start image context, and
// link the current image to the head. This is the
// only image that can call Exit()
//
HandleDatabaseKey = CoreGetHandleDatabaseKey ();
LastImage = mCurrentImage;
mCurrentImage = Image;
Image->Tpl = gEfiCurrentTpl;
//
// Set long jump for Exit() support
// JumpContext must be aligned on a CPU specific boundary.
// Overallocate the buffer and force the required alignment
//
Image->JumpBuffer = AllocatePool (sizeof (BASE_LIBRARY_JUMP_BUFFER) + BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT);
if (Image->JumpBuffer == NULL) {
PERF_END (ImageHandle, START_IMAGE_TOK, NULL, 0);
return EFI_OUT_OF_RESOURCES;
}
Image->JumpContext = ALIGN_POINTER (Image->JumpBuffer, BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT);
SetJumpFlag = SetJump (Image->JumpContext);
//
// The initial call to SetJump() must always return 0.
// Subsequent calls to LongJump() cause a non-zero value to be returned by SetJump().
//
if (SetJumpFlag == 0) {
//
// Call the image's entry point
//
Image->Started = TRUE;
Image->Status = Image->EntryPoint (ImageHandle, Image->Info.SystemTable);
//
// Add some debug information if the image returned with error.
// This make the user aware and check if the driver image have already released
// all the resource in this situation.
//
DEBUG_CODE_BEGIN ();
if (EFI_ERROR (Image->Status)) {
DEBUG ((DEBUG_ERROR, "Error: Image at %11p start failed: %r\n", Image->Info.ImageBase, Image->Status));
}
DEBUG_CODE_END ();
//
// If the image returns, exit it through Exit()
//
CoreExit (ImageHandle, Image->Status, 0, NULL);
}
//
// Image has completed. Verify the tpl is the same
//
ASSERT (Image->Tpl == gEfiCurrentTpl);
CoreRestoreTpl (Image->Tpl);
CoreFreePool (Image->JumpBuffer);
//
// Pop the current start image context
//
mCurrentImage = LastImage;
//
// Go connect any handles that were created or modified while the image executed.
//
CoreConnectHandlesByKey (HandleDatabaseKey);
//
// Handle the image's returned ExitData
//
DEBUG_CODE_BEGIN ();
if (Image->ExitDataSize != 0 || Image->ExitData != NULL) {
DEBUG ((DEBUG_LOAD, "StartImage: ExitDataSize %d, ExitData %p", Image->ExitDataSize, Image->ExitData));
if (Image->ExitData != NULL) {
DEBUG ((DEBUG_LOAD, " (%hs)", Image->ExitData));
}
DEBUG ((DEBUG_LOAD, "\n"));
}
DEBUG_CODE_END ();
//
// Return the exit data to the caller
//
if (ExitData != NULL && ExitDataSize != NULL) {
*ExitDataSize = Image->ExitDataSize;
*ExitData = Image->ExitData;
} else {
//
// Caller doesn't want the exit data, free it
//
CoreFreePool (Image->ExitData);
Image->ExitData = NULL;
}
//
// Save the Status because Image will get destroyed if it is unloaded.
//
Status = Image->Status;
//
// If the image returned an error, or if the image is an application
// unload it
//
if (EFI_ERROR (Image->Status) || Image->Type == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION) {
CoreUnloadAndCloseImage (Image, TRUE);
}
//
// Done
//
PERF_END (ImageHandle, START_IMAGE_TOK, NULL, 0);
return Status;
}
/**
Terminates the currently loaded EFI image and returns control to boot services.
@param ImageHandle Handle that identifies the image. This
parameter is passed to the image on entry.
@param Status The image's exit code.
@param ExitDataSize The size, in bytes, of ExitData. Ignored if
ExitStatus is EFI_SUCCESS.
@param ExitData Pointer to a data buffer that includes a
Null-terminated Unicode string, optionally
followed by additional binary data. The string
is a description that the caller may use to
further indicate the reason for the image's
exit.
@retval EFI_INVALID_PARAMETER Image handle is NULL or it is not current
image.
@retval EFI_SUCCESS Successfully terminates the currently loaded
EFI image.
@retval EFI_ACCESS_DENIED Should never reach there.
@retval EFI_OUT_OF_RESOURCES Could not allocate pool
**/
EFI_STATUS
EFIAPI
CoreExit (
IN EFI_HANDLE ImageHandle,
IN EFI_STATUS Status,
IN UINTN ExitDataSize,
IN CHAR16 *ExitData OPTIONAL
)
{
LOADED_IMAGE_PRIVATE_DATA *Image;
EFI_TPL OldTpl;
//
// Prevent possible reentrance to this function
// for the same ImageHandle
//
OldTpl = CoreRaiseTpl (TPL_NOTIFY);
Image = CoreLoadedImageInfo (ImageHandle);
if (Image == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
if (!Image->Started) {
//
// The image has not been started so just free its resources
//
CoreUnloadAndCloseImage (Image, TRUE);
Status = EFI_SUCCESS;
goto Done;
}
//
// Image has been started, verify this image can exit
//
if (Image != mCurrentImage) {
DEBUG ((DEBUG_LOAD|DEBUG_ERROR, "Exit: Image is not exitable image\n"));
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Set status
//
Image->Status = Status;
//
// If there's ExitData info, move it
//
if (ExitData != NULL) {
Image->ExitDataSize = ExitDataSize;
Image->ExitData = AllocatePool (Image->ExitDataSize);
if (Image->ExitData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
CopyMem (Image->ExitData, ExitData, Image->ExitDataSize);
}
CoreRestoreTpl (OldTpl);
//
// return to StartImage
//
LongJump (Image->JumpContext, (UINTN)-1);
//
// If we return from LongJump, then it is an error
//
ASSERT (FALSE);
Status = EFI_ACCESS_DENIED;
Done:
CoreRestoreTpl (OldTpl);
return Status;
}
/**
Unloads an image.
@param ImageHandle Handle that identifies the image to be
unloaded.
@retval EFI_SUCCESS The image has been unloaded.
@retval EFI_UNSUPPORTED The image has been sarted, and does not support
unload.
@retval EFI_INVALID_PARAMPETER ImageHandle is not a valid image handle.
**/
EFI_STATUS
EFIAPI
CoreUnloadImage (
IN EFI_HANDLE ImageHandle
)
{
EFI_STATUS Status;
LOADED_IMAGE_PRIVATE_DATA *Image;
Image = CoreLoadedImageInfo (ImageHandle);
if (Image == NULL ) {
//
// The image handle is not valid
//
Status = EFI_INVALID_PARAMETER;
goto Done;
}
if (Image->Started) {
//
// The image has been started, request it to unload.
//
Status = EFI_UNSUPPORTED;
if (Image->Info.Unload != NULL) {
Status = Image->Info.Unload (ImageHandle);
}
} else {
//
// This Image hasn't been started, thus it can be unloaded
//
Status = EFI_SUCCESS;
}
if (!EFI_ERROR (Status)) {
//
// if the Image was not started or Unloaded O.K. then clean up
//
CoreUnloadAndCloseImage (Image, TRUE);
}
Done:
return Status;
}
/**
Unload the specified image.
@param This Indicates the calling context.
@param ImageHandle The specified image handle.
@retval EFI_INVALID_PARAMETER Image handle is NULL.
@retval EFI_UNSUPPORTED Attempt to unload an unsupported image.
@retval EFI_SUCCESS Image successfully unloaded.
**/
EFI_STATUS
EFIAPI
CoreUnloadImageEx (
IN EFI_PE32_IMAGE_PROTOCOL *This,
IN EFI_HANDLE ImageHandle
)
{
return CoreUnloadImage (ImageHandle);
}
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