mirror of https://github.com/acidanthera/audk.git
149 lines
3.9 KiB
C
149 lines
3.9 KiB
C
/** @file
|
|
* PE/COFF emulator protocol implementation to start Linux kernel
|
|
* images from non-native firmware
|
|
*
|
|
* Copyright (c) 2020, ARM Ltd. All rights reserved.<BR>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
*
|
|
*/
|
|
|
|
#include <PiDxe.h>
|
|
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/PeCoffLib.h>
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
|
|
#include <Protocol/PeCoffImageEmulator.h>
|
|
|
|
#pragma pack (1)
|
|
typedef struct {
|
|
UINT8 Type;
|
|
UINT8 Size;
|
|
UINT16 MachineType;
|
|
UINT32 EntryPoint;
|
|
} PE_COMPAT_TYPE1;
|
|
#pragma pack ()
|
|
|
|
STATIC
|
|
BOOLEAN
|
|
EFIAPI
|
|
IsImageSupported (
|
|
IN EDKII_PECOFF_IMAGE_EMULATOR_PROTOCOL *This,
|
|
IN UINT16 ImageType,
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath OPTIONAL
|
|
)
|
|
{
|
|
return ImageType == EFI_IMAGE_SUBSYSTEM_EFI_APPLICATION;
|
|
}
|
|
|
|
STATIC
|
|
EFI_IMAGE_ENTRY_POINT
|
|
EFIAPI
|
|
GetCompatEntryPoint (
|
|
IN EFI_PHYSICAL_ADDRESS ImageBase
|
|
)
|
|
{
|
|
EFI_IMAGE_DOS_HEADER *DosHdr;
|
|
UINTN PeCoffHeaderOffset;
|
|
EFI_IMAGE_NT_HEADERS32 *Pe32;
|
|
EFI_IMAGE_SECTION_HEADER *Section;
|
|
UINTN NumberOfSections;
|
|
PE_COMPAT_TYPE1 *PeCompat;
|
|
UINTN PeCompatEnd;
|
|
|
|
DosHdr = (EFI_IMAGE_DOS_HEADER *)(UINTN)ImageBase;
|
|
if (DosHdr->e_magic != EFI_IMAGE_DOS_SIGNATURE) {
|
|
return NULL;
|
|
}
|
|
|
|
PeCoffHeaderOffset = DosHdr->e_lfanew;
|
|
Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN)ImageBase + PeCoffHeaderOffset);
|
|
|
|
Section = (EFI_IMAGE_SECTION_HEADER *)((UINTN)&Pe32->OptionalHeader +
|
|
Pe32->FileHeader.SizeOfOptionalHeader);
|
|
NumberOfSections = (UINTN)Pe32->FileHeader.NumberOfSections;
|
|
|
|
while (NumberOfSections--) {
|
|
if (!CompareMem (Section->Name, ".compat", sizeof (Section->Name))) {
|
|
//
|
|
// Dereference the section contents to find the mixed mode entry point
|
|
//
|
|
PeCompat = (PE_COMPAT_TYPE1 *)((UINTN)ImageBase + Section->VirtualAddress);
|
|
PeCompatEnd = (UINTN)(VOID *)PeCompat + Section->Misc.VirtualSize;
|
|
|
|
while (PeCompat->Type != 0 && (UINTN)(VOID *)PeCompat < PeCompatEnd) {
|
|
if ((PeCompat->Type == 1) &&
|
|
(PeCompat->Size >= sizeof (PE_COMPAT_TYPE1)) &&
|
|
EFI_IMAGE_MACHINE_TYPE_SUPPORTED (PeCompat->MachineType))
|
|
{
|
|
return (EFI_IMAGE_ENTRY_POINT)((UINTN)ImageBase + PeCompat->EntryPoint);
|
|
}
|
|
|
|
PeCompat = (PE_COMPAT_TYPE1 *)((UINTN)PeCompat + PeCompat->Size);
|
|
ASSERT ((UINTN)(VOID *)PeCompat < PeCompatEnd);
|
|
}
|
|
}
|
|
|
|
Section++;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
STATIC
|
|
EFI_STATUS
|
|
EFIAPI
|
|
RegisterImage (
|
|
IN EDKII_PECOFF_IMAGE_EMULATOR_PROTOCOL *This,
|
|
IN EFI_PHYSICAL_ADDRESS ImageBase,
|
|
IN UINT64 ImageSize,
|
|
IN OUT EFI_IMAGE_ENTRY_POINT *EntryPoint
|
|
)
|
|
{
|
|
EFI_IMAGE_ENTRY_POINT CompatEntryPoint;
|
|
|
|
CompatEntryPoint = GetCompatEntryPoint (ImageBase);
|
|
if (CompatEntryPoint == NULL) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
*EntryPoint = CompatEntryPoint;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
STATIC
|
|
EFI_STATUS
|
|
EFIAPI
|
|
UnregisterImage (
|
|
IN EDKII_PECOFF_IMAGE_EMULATOR_PROTOCOL *This,
|
|
IN EFI_PHYSICAL_ADDRESS ImageBase
|
|
)
|
|
{
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
STATIC EDKII_PECOFF_IMAGE_EMULATOR_PROTOCOL mCompatLoaderPeCoffEmuProtocol = {
|
|
IsImageSupported,
|
|
RegisterImage,
|
|
UnregisterImage,
|
|
EDKII_PECOFF_IMAGE_EMULATOR_VERSION,
|
|
EFI_IMAGE_MACHINE_X64
|
|
};
|
|
|
|
EFI_STATUS
|
|
EFIAPI
|
|
CompatImageLoaderDxeEntryPoint (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
return gBS->InstallProtocolInterface (
|
|
&ImageHandle,
|
|
&gEdkiiPeCoffImageEmulatorProtocolGuid,
|
|
EFI_NATIVE_INTERFACE,
|
|
&mCompatLoaderPeCoffEmuProtocol
|
|
);
|
|
}
|