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https://github.com/acidanthera/audk.git
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e6b6aa90d4
Adds dynamic stack cookies in the form of copies of the entry point libraries that use shared logic to update stack cookies at runtime. This relies on RDRAND on IA32/X64 and RNDR on AARCH64 to get a random number to apply to the stack cookie on module entry point. This simplifies the logic a platform must do to include stack check functionality. Signed-off-by: Oliver Smith-Denny <osde@microsoft.com>
136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/** @file
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Entry point to a Standalone MM driver.
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Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2016 - 2018, ARM Ltd. All rights reserved.<BR>
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Copyright (c) 2018, Linaro, Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiMm.h>
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#include <Protocol/LoadedImage.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MmServicesTableLib.h>
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#include <Library/StandaloneMmDriverEntryPoint.h>
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/**
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Unloads an image from memory.
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This function is a callback that a driver registers to do cleanup
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when the UnloadImage boot service function is called.
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@param ImageHandle The handle to the image to unload.
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@return Status returned by all unload().
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**/
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EFI_STATUS
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EFIAPI
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_DriverUnloadHandler (
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EFI_HANDLE ImageHandle
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)
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{
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EFI_STATUS Status;
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//
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// If an UnloadImage() handler is specified, then call it
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//
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Status = ProcessModuleUnloadList (ImageHandle);
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//
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// If the driver specific unload handler does not return an error, then call all of the
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// library destructors. If the unload handler returned an error, then the driver can not be
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// unloaded, and the library destructors should not be called
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//
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if (!EFI_ERROR (Status)) {
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ProcessLibraryDestructorList (ImageHandle, gMmst);
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}
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//
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// Return the status from the driver specific unload handler
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//
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return Status;
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}
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/**
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The entry point of PE/COFF Image for a Standalone MM Driver.
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This function is the entry point for a Standalone MM Driver.
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This function must call ProcessLibraryConstructorList() and
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ProcessModuleEntryPointList().
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If the return status from ProcessModuleEntryPointList()
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is an error status, then ProcessLibraryDestructorList() must be called.
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The return value from ProcessModuleEntryPointList() is returned.
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If _gMmRevision is not zero and SystemTable->Hdr.Revision is
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less than _gMmRevision, then return EFI_INCOMPATIBLE_VERSION.
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@param ImageHandle The image handle of the Standalone MM Driver.
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@param MmSystemTable A pointer to the MM System Table.
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@retval EFI_SUCCESS The Standalone MM Driver exited normally.
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@retval EFI_INCOMPATIBLE_VERSION _gMmRevision is greater than
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MmSystemTable->Hdr.Revision.
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@retval Other Return value from
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ProcessModuleEntryPointList().
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**/
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EFI_STATUS
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EFIAPI
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_CModuleEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN IN EFI_MM_SYSTEM_TABLE *MmSystemTable
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)
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{
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EFI_STATUS Status;
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EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
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if (_gMmRevision != 0) {
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//
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// Make sure that the MM spec revision of the platform
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// is >= MM spec revision of the driver
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//
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if (MmSystemTable->Hdr.Revision < _gMmRevision) {
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return EFI_INCOMPATIBLE_VERSION;
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}
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}
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//
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// Call constructor for all libraries
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//
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ProcessLibraryConstructorList (ImageHandle, MmSystemTable);
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//
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// Install unload handler...
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//
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if (_gDriverUnloadImageCount != 0) {
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Status = gMmst->MmHandleProtocol (
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ImageHandle,
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&gEfiLoadedImageProtocolGuid,
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(VOID **)&LoadedImage
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);
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ASSERT_EFI_ERROR (Status);
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LoadedImage->Unload = _DriverUnloadHandler;
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}
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//
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// Call the driver entry point
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//
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Status = ProcessModuleEntryPointList (ImageHandle, MmSystemTable);
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//
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// If all of the drivers returned errors, then invoke all of the library destructors
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//
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if (EFI_ERROR (Status)) {
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ProcessLibraryDestructorList (ImageHandle, MmSystemTable);
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}
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//
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// Return the cumulative return status code from all of the driver entry points
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//
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return Status;
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}
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