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714 lines
16 KiB
C
714 lines
16 KiB
C
/** @file
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Copyright (c) 2024, Mikhail Krichanov. All rights reserved.
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SPDX-License-Identifier: BSD-3-Clause
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**/
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#include "DxeMain.h"
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EFI_DRIVER_BINDING_PROTOCOL mRing3DriverBindingProtocol;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL mRing3SimpleFileSystemProtocol;
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EFI_FILE_PROTOCOL mRing3FileProtocol;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *mRing3SimpleFileSystemPointer;
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typedef struct {
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EFI_FILE_PROTOCOL Protocol;
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EFI_FILE_PROTOCOL *Ring3File;
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} RING3_EFI_FILE_PROTOCOL;
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EFI_STATUS
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EFIAPI
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GoToRing3 (
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IN UINT8 Number,
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IN VOID *EntryPoint,
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...
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)
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{
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EFI_STATUS Status;
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RING3_CALL_DATA *Input;
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VA_LIST Marker;
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UINTN Index;
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DisableSMAP ();
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Status = gBS->AllocatePool (
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EfiRing3MemoryType,
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sizeof (RING3_CALL_DATA) + Number * sizeof (UINTN),
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(VOID **)&Input
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);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "Ring0: Failed to allocate memory for Input data.\n"));
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EnableSMAP ();
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return Status;
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}
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Input->NumberOfArguments = Number;
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Input->EntryPoint = EntryPoint;
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VA_START (Marker, EntryPoint);
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for (Index = 0; Index < Number; ++Index) {
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Input->Arguments[Index] = VA_ARG (Marker, UINTN);
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}
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VA_END (Marker);
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EnableSMAP ();
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if (Number == 2) {
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//
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// Necessary fix for ProcessLibraryConstructorList() -> DxeCcProbeLibConstructor()
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//
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SetUefiImageMemoryAttributes (
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FixedPcdGet32 (PcdOvmfWorkAreaBase),
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FixedPcdGet32 (PcdOvmfWorkAreaSize),
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EFI_MEMORY_XP | EFI_MEMORY_USER
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);
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}
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Status = CallRing3 (Input);
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if (Number == 2) {
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SetUefiImageMemoryAttributes (
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FixedPcdGet32 (PcdOvmfWorkAreaBase),
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FixedPcdGet32 (PcdOvmfWorkAreaSize),
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EFI_MEMORY_XP
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);
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}
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return Status;
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}
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STATIC
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EFIAPI
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VOID *
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Ring3Copy (
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IN VOID *Core,
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IN UINT32 Size
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)
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{
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EFI_STATUS Status;
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VOID *Ring3;
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Status = CoreAllocatePages (
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AllocateAnyPages,
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EfiRing3MemoryType,
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1,
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(EFI_PHYSICAL_ADDRESS *)&Ring3
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);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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DisableSMAP ();
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CopyMem (Ring3, Core, Size);
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EnableSMAP ();
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return Ring3;
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}
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EFI_STATUS
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EFIAPI
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CoreDriverBindingSupported (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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)
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{
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EFI_STATUS Status;
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This = Ring3Copy (This, sizeof (EFI_DRIVER_BINDING_PROTOCOL));
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if (This == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Status = GoToRing3 (
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3,
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(VOID *)mRing3DriverBindingProtocol.Supported,
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This,
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ControllerHandle,
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RemainingDevicePath
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);
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)This, 1);
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return Status;
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}
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EFI_STATUS
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EFIAPI
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CoreDriverBindingStart (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
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)
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{
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EFI_STATUS Status;
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This = Ring3Copy (This, sizeof (EFI_DRIVER_BINDING_PROTOCOL));
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if (This == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Status = GoToRing3 (
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3,
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(VOID *)mRing3DriverBindingProtocol.Start,
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This,
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ControllerHandle,
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RemainingDevicePath
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);
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)This, 1);
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return Status;
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}
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EFI_STATUS
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EFIAPI
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CoreDriverBindingStop (
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IN EFI_DRIVER_BINDING_PROTOCOL *This,
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IN EFI_HANDLE ControllerHandle,
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IN UINTN NumberOfChildren,
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IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
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)
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{
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EFI_STATUS Status;
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This = Ring3Copy (This, sizeof (EFI_DRIVER_BINDING_PROTOCOL));
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if (This == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Status = GoToRing3 (
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4,
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(VOID *)mRing3DriverBindingProtocol.Stop,
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This,
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ControllerHandle,
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NumberOfChildren,
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ChildHandleBuffer
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);
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)This, 1);
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return Status;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileClose (
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IN EFI_FILE_PROTOCOL *This
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)
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{
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EFI_STATUS Status;
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RING3_EFI_FILE_PROTOCOL *File;
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File = (RING3_EFI_FILE_PROTOCOL *)This;
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Status = GoToRing3 (
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1,
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(VOID *)mRing3FileProtocol.Close,
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File->Ring3File
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);
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FreePool (This);
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return Status;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileDelete (
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IN EFI_FILE_PROTOCOL *This
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileRead (
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IN EFI_FILE_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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EFI_STATUS Status;
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RING3_EFI_FILE_PROTOCOL *File;
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UINTN *Ring3BufferSize;
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VOID *Ring3Buffer;
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VOID *Ring3Pages;
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UINT32 PagesNumber;
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if ((This == NULL) || (BufferSize == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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File = (RING3_EFI_FILE_PROTOCOL *)This;
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Ring3Buffer = NULL;
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Ring3Pages = NULL;
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PagesNumber = EFI_SIZE_TO_PAGES (sizeof (UINTN *) + *BufferSize);
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Status = CoreAllocatePages (
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AllocateAnyPages,
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EfiRing3MemoryType,
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PagesNumber,
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(EFI_PHYSICAL_ADDRESS *)&Ring3Pages
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Ring3BufferSize = (UINTN *)Ring3Pages;
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DisableSMAP ();
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*Ring3BufferSize = *BufferSize;
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EnableSMAP ();
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if (Buffer != NULL) {
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Ring3Buffer = (VOID *)((UINTN *)Ring3Pages + 1);
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}
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Status = GoToRing3 (
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3,
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(VOID *)mRing3FileProtocol.Read,
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File->Ring3File,
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Ring3BufferSize,
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Ring3Buffer
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);
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DisableSMAP ();
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if ((Ring3Buffer != NULL) && (Buffer != NULL) && (*BufferSize >= *Ring3BufferSize)) {
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CopyMem (Buffer, Ring3Buffer, *Ring3BufferSize);
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}
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*BufferSize = *Ring3BufferSize;
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EnableSMAP ();
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Pages, PagesNumber);
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return Status;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileWrite (
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IN EFI_FILE_PROTOCOL *This,
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IN OUT UINTN *BufferSize,
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IN VOID *Buffer
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileSetPosition (
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IN EFI_FILE_PROTOCOL *This,
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IN UINT64 Position
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)
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{
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RING3_EFI_FILE_PROTOCOL *File;
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File = (RING3_EFI_FILE_PROTOCOL *)This;
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return GoToRing3 (
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2,
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(VOID *)mRing3FileProtocol.SetPosition,
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File->Ring3File,
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Position
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);
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileGetPosition (
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IN EFI_FILE_PROTOCOL *This,
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OUT UINT64 *Position
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)
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{
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EFI_STATUS Status;
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RING3_EFI_FILE_PROTOCOL *File;
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UINT64 *Ring3Position;
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if ((This == NULL) || (Position == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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File = (RING3_EFI_FILE_PROTOCOL *)This;
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Ring3Position = NULL;
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Status = CoreAllocatePages (
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AllocateAnyPages,
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EfiRing3MemoryType,
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1,
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(EFI_PHYSICAL_ADDRESS *)&Ring3Position
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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DisableSMAP ();
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*Ring3Position = *Position;
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EnableSMAP ();
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Status = GoToRing3 (
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2,
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(VOID *)mRing3FileProtocol.GetPosition,
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File->Ring3File,
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Ring3Position
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);
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DisableSMAP ();
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*Position = *Ring3Position;
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EnableSMAP ();
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Position, 1);
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return Status;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileGetInfo (
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IN EFI_FILE_PROTOCOL *This,
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IN EFI_GUID *InformationType,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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EFI_STATUS Status;
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RING3_EFI_FILE_PROTOCOL *File;
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EFI_GUID *Ring3InformationType;
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UINTN *Ring3BufferSize;
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VOID *Ring3Buffer;
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VOID *Ring3Pages;
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UINT32 PagesNumber;
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if ((This == NULL) || (BufferSize == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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File = (RING3_EFI_FILE_PROTOCOL *)This;
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Ring3Buffer = NULL;
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Ring3InformationType = NULL;
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Ring3Pages = NULL;
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PagesNumber = EFI_SIZE_TO_PAGES (sizeof (UINTN *) + *BufferSize + sizeof (EFI_GUID));
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Status = CoreAllocatePages (
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AllocateAnyPages,
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EfiRing3MemoryType,
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PagesNumber,
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(EFI_PHYSICAL_ADDRESS *)&Ring3Pages
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Ring3BufferSize = (UINTN *)Ring3Pages;
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DisableSMAP ();
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*Ring3BufferSize = *BufferSize;
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EnableSMAP ();
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if (Buffer != NULL) {
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Ring3Buffer = (VOID *)((UINTN *)Ring3Pages + 1);
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}
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if (InformationType != NULL) {
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Ring3InformationType = (EFI_GUID *)((UINTN)Ring3Pages + sizeof (UINTN *) + *BufferSize);
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DisableSMAP ();
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CopyGuid (Ring3InformationType, InformationType);
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EnableSMAP ();
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}
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Status = GoToRing3 (
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4,
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(VOID *)mRing3FileProtocol.GetInfo,
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File->Ring3File,
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Ring3InformationType,
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Ring3BufferSize,
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Ring3Buffer
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);
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DisableSMAP ();
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if ((Ring3Buffer != NULL) && (Buffer != NULL) && (*BufferSize >= *Ring3BufferSize)) {
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CopyMem (Buffer, Ring3Buffer, *Ring3BufferSize);
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}
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*BufferSize = *Ring3BufferSize;
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EnableSMAP ();
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Pages, PagesNumber);
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return Status;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileSetInfo (
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IN EFI_FILE_PROTOCOL *This,
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IN EFI_GUID *InformationType,
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IN UINTN BufferSize,
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IN VOID *Buffer
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileFlush (
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IN EFI_FILE_PROTOCOL *This
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileOpenEx (
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IN EFI_FILE_PROTOCOL *This,
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OUT EFI_FILE_PROTOCOL **NewHandle,
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IN CHAR16 *FileName,
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IN UINT64 OpenMode,
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IN UINT64 Attributes,
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IN OUT EFI_FILE_IO_TOKEN *Token
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileReadEx (
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IN EFI_FILE_PROTOCOL *This,
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IN OUT EFI_FILE_IO_TOKEN *Token
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileWriteEx (
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IN EFI_FILE_PROTOCOL *This,
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IN OUT EFI_FILE_IO_TOKEN *Token
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileFlushEx (
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IN EFI_FILE_PROTOCOL *This,
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IN OUT EFI_FILE_IO_TOKEN *Token
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)
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{
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return EFI_UNSUPPORTED;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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CoreFileOpen (
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IN EFI_FILE_PROTOCOL *This,
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OUT EFI_FILE_PROTOCOL **NewHandle,
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IN CHAR16 *FileName,
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IN UINT64 OpenMode,
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IN UINT64 Attributes
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)
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{
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EFI_STATUS Status;
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RING3_EFI_FILE_PROTOCOL *File;
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RING3_EFI_FILE_PROTOCOL *NewFile;
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EFI_FILE_PROTOCOL **Ring3NewHandle;
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CHAR16 *Ring3FileName;
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VOID *Ring3Pages;
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UINT32 PagesNumber;
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if ((This == NULL) || (NewHandle == NULL) || (FileName == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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File = (RING3_EFI_FILE_PROTOCOL *)This;
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Ring3NewHandle = NULL;
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Ring3FileName = NULL;
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Ring3Pages = NULL;
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PagesNumber = EFI_SIZE_TO_PAGES (sizeof (EFI_FILE_PROTOCOL *) + StrSize (FileName));
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Status = CoreAllocatePages (
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AllocateAnyPages,
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EfiRing3MemoryType,
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PagesNumber,
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(EFI_PHYSICAL_ADDRESS *)&Ring3Pages
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);
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if (EFI_ERROR (Status)) {
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*NewHandle = NULL;
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return Status;
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}
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Ring3NewHandle = (EFI_FILE_PROTOCOL **)Ring3Pages;
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Ring3FileName = (CHAR16 *)((EFI_FILE_PROTOCOL **)Ring3Pages + 1);
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DisableSMAP ();
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Status = StrCpyS (Ring3FileName, StrLen (FileName) + 1, FileName);
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EnableSMAP ();
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if (EFI_ERROR (Status)) {
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*NewHandle = NULL;
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Pages, PagesNumber);
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return Status;
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}
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Status = GoToRing3 (
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5,
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(VOID *)mRing3FileProtocol.Open,
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File->Ring3File,
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Ring3NewHandle,
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Ring3FileName,
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OpenMode,
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Attributes
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);
|
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if (EFI_ERROR (Status)) {
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*NewHandle = NULL;
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Pages, PagesNumber);
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return Status;
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}
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NewFile = AllocatePool (sizeof (RING3_EFI_FILE_PROTOCOL));
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if (NewFile == NULL) {
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*NewHandle = NULL;
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CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Pages, PagesNumber);
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return EFI_OUT_OF_RESOURCES;
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}
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NewFile->Protocol.Revision = mRing3FileProtocol.Revision;
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NewFile->Protocol.Open = CoreFileOpen;
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NewFile->Protocol.Close = CoreFileClose;
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NewFile->Protocol.Delete = CoreFileDelete;
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NewFile->Protocol.Read = CoreFileRead;
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NewFile->Protocol.Write = CoreFileWrite;
|
|
NewFile->Protocol.GetPosition = CoreFileGetPosition;
|
|
NewFile->Protocol.SetPosition = CoreFileSetPosition;
|
|
NewFile->Protocol.GetInfo = CoreFileGetInfo;
|
|
NewFile->Protocol.SetInfo = CoreFileSetInfo;
|
|
NewFile->Protocol.Flush = CoreFileFlush;
|
|
NewFile->Protocol.OpenEx = CoreFileOpenEx;
|
|
NewFile->Protocol.ReadEx = CoreFileReadEx;
|
|
NewFile->Protocol.WriteEx = CoreFileWriteEx;
|
|
NewFile->Protocol.FlushEx = CoreFileFlushEx;
|
|
|
|
DisableSMAP ();
|
|
NewFile->Ring3File = *Ring3NewHandle;
|
|
EnableSMAP ();
|
|
|
|
*NewHandle = (EFI_FILE_PROTOCOL *)NewFile;
|
|
|
|
CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Pages, PagesNumber);
|
|
|
|
return Status;
|
|
}
|
|
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CoreOpenVolume (
|
|
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
|
|
OUT EFI_FILE_PROTOCOL **Root
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_FILE_PROTOCOL **Ring3Root;
|
|
RING3_EFI_FILE_PROTOCOL *File;
|
|
|
|
if (Root == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
Status = CoreAllocatePages (
|
|
AllocateAnyPages,
|
|
EfiRing3MemoryType,
|
|
1,
|
|
(EFI_PHYSICAL_ADDRESS *)&Ring3Root
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
*Root = NULL;
|
|
return Status;
|
|
}
|
|
|
|
Status = GoToRing3 (
|
|
2,
|
|
(VOID *)mRing3SimpleFileSystemProtocol.OpenVolume,
|
|
mRing3SimpleFileSystemPointer,
|
|
Ring3Root
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
*Root = NULL;
|
|
CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Root, 1);
|
|
return Status;
|
|
}
|
|
|
|
File = AllocatePool (sizeof (RING3_EFI_FILE_PROTOCOL));
|
|
if (File == NULL) {
|
|
*Root = NULL;
|
|
CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Root, 1);
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
|
|
DisableSMAP ();
|
|
mRing3FileProtocol.Revision = (*Ring3Root)->Revision;
|
|
mRing3FileProtocol.Open = (*Ring3Root)->Open;
|
|
mRing3FileProtocol.Close = (*Ring3Root)->Close;
|
|
mRing3FileProtocol.Delete = (*Ring3Root)->Delete;
|
|
mRing3FileProtocol.Read = (*Ring3Root)->Read;
|
|
mRing3FileProtocol.Write = (*Ring3Root)->Write;
|
|
mRing3FileProtocol.GetPosition = (*Ring3Root)->GetPosition;
|
|
mRing3FileProtocol.SetPosition = (*Ring3Root)->SetPosition;
|
|
mRing3FileProtocol.GetInfo = (*Ring3Root)->GetInfo;
|
|
mRing3FileProtocol.SetInfo = (*Ring3Root)->SetInfo;
|
|
mRing3FileProtocol.Flush = (*Ring3Root)->Flush;
|
|
mRing3FileProtocol.OpenEx = (*Ring3Root)->OpenEx;
|
|
mRing3FileProtocol.ReadEx = (*Ring3Root)->ReadEx;
|
|
mRing3FileProtocol.WriteEx = (*Ring3Root)->WriteEx;
|
|
mRing3FileProtocol.FlushEx = (*Ring3Root)->FlushEx;
|
|
|
|
File->Ring3File = *Ring3Root;
|
|
EnableSMAP ();
|
|
|
|
File->Protocol.Revision = mRing3FileProtocol.Revision;
|
|
File->Protocol.Open = CoreFileOpen;
|
|
File->Protocol.Close = CoreFileClose;
|
|
File->Protocol.Delete = CoreFileDelete;
|
|
File->Protocol.Read = CoreFileRead;
|
|
File->Protocol.Write = CoreFileWrite;
|
|
File->Protocol.GetPosition = CoreFileGetPosition;
|
|
File->Protocol.SetPosition = CoreFileSetPosition;
|
|
File->Protocol.GetInfo = CoreFileGetInfo;
|
|
File->Protocol.SetInfo = CoreFileSetInfo;
|
|
File->Protocol.Flush = CoreFileFlush;
|
|
File->Protocol.OpenEx = CoreFileOpenEx;
|
|
File->Protocol.ReadEx = CoreFileReadEx;
|
|
File->Protocol.WriteEx = CoreFileWriteEx;
|
|
File->Protocol.FlushEx = CoreFileFlushEx;
|
|
|
|
*Root = (EFI_FILE_PROTOCOL *)File;
|
|
|
|
CoreFreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)Ring3Root, 1);
|
|
|
|
return Status;
|
|
}
|