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/** @file
*
* Copyright (c) 2011 - 2015, ARM Limited. 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 "BdsInternal.h"
// This GUID is defined in the INGF file of ArmPkg/Application/LinuxLoader
CONST EFI_GUID mLinuxLoaderAppGuid = { 0x701f54f2, 0x0d70, 0x4b89, { 0xbc, 0x0a, 0xd9, 0xca, 0x25, 0x37, 0x90, 0x59 }};
// Device path of the EFI Linux Loader in the Firmware Volume
EFI_DEVICE_PATH* mLinuxLoaderDevicePath = NULL;
STATIC
BOOLEAN
HasFilePathEfiExtension (
IN CHAR16* FilePath
)
{
return (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".EFI") == 0) ||
(StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".efi") == 0);
}
/**
* This function check if the DevicePath defines an EFI binary
*
* This function is used when the BDS support Linux loader to
* detect if the binary is an EFI application or potentially a
* Linux kernel.
*/
EFI_STATUS
IsEfiBinary (
IN EFI_DEVICE_PATH* DevicePath,
OUT BOOLEAN *EfiBinary
)
{
EFI_STATUS Status;
CHAR16* FileName;
EFI_DEVICE_PATH* PrevDevicePathNode;
EFI_DEVICE_PATH* DevicePathNode;
EFI_PHYSICAL_ADDRESS Image;
UINTN FileSize;
EFI_IMAGE_DOS_HEADER* DosHeader;
UINTN PeCoffHeaderOffset;
EFI_IMAGE_NT_HEADERS32* NtHeader;
ASSERT (EfiBinary != NULL);
//
// Check if the last node of the device path is a FilePath node
//
PrevDevicePathNode = NULL;
DevicePathNode = DevicePath;
while ((DevicePathNode != NULL) && !IsDevicePathEnd (DevicePathNode)) {
PrevDevicePathNode = DevicePathNode;
DevicePathNode = NextDevicePathNode (DevicePathNode);
}
if ((PrevDevicePathNode != NULL) &&
(PrevDevicePathNode->Type == MEDIA_DEVICE_PATH) &&
(PrevDevicePathNode->SubType == MEDIA_FILEPATH_DP))
{
FileName = ((FILEPATH_DEVICE_PATH*)PrevDevicePathNode)->PathName;
} else {
FileName = NULL;
}
if (FileName == NULL) {
Print (L"Is an EFI Application? ");
Status = GetHIInputBoolean (EfiBinary);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
} else if (HasFilePathEfiExtension (FileName)) {
*EfiBinary = TRUE;
} else {
// Check if the file exist
Status = BdsLoadImage (DevicePath, AllocateAnyPages, &Image, &FileSize);
if (!EFI_ERROR (Status)) {
DosHeader = (EFI_IMAGE_DOS_HEADER *)(UINTN) Image;
if (DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
//
// DOS image header is present,
// so read the PE header after the DOS image header.
//
PeCoffHeaderOffset = DosHeader->e_lfanew;
} else {
PeCoffHeaderOffset = 0;
}
//
// Check PE/COFF image.
//
NtHeader = (EFI_IMAGE_NT_HEADERS32 *)(UINTN) (Image + PeCoffHeaderOffset);
if (NtHeader->Signature != EFI_IMAGE_NT_SIGNATURE) {
*EfiBinary = FALSE;
} else {
*EfiBinary = TRUE;
}
// Free memory
gBS->FreePages (Image, EFI_SIZE_TO_PAGES (FileSize));
} else {
// If we did not manage to open it then ask for the type
Print (L"Is an EFI Application? ");
Status = GetHIInputBoolean (EfiBinary);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
}
}
return EFI_SUCCESS;
}
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