mirror of https://github.com/acidanthera/audk.git
146 lines
4.5 KiB
C
146 lines
4.5 KiB
C
/** @file
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Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Uefi.h>
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#include <Library/BaseLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PeCoffLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DxeServicesLib.h>
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#include <Library/CacheMaintenanceLib.h>
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#include <Library/UefiLib.h>
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/**
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Relocate this image under 4G memory.
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@param ImageHandle Handle of driver image.
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@param SystemTable Pointer to system table.
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@retval EFI_SUCCESS Image successfully relocated.
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@retval EFI_ABORTED Failed to relocate image.
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**/
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EFI_STATUS
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RelocateImageUnder4GIfNeeded (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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UINT8 *Buffer;
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UINTN BufferSize;
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EFI_HANDLE NewImageHandle;
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UINTN Pages;
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EFI_PHYSICAL_ADDRESS FfsBuffer;
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PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
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VOID *Interface;
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//
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// If it is already <4G, no need do relocate
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//
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if ((UINTN)RelocateImageUnder4GIfNeeded < 0xFFFFFFFF) {
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return EFI_SUCCESS;
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}
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//
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// If locate gEfiCallerIdGuid success, it means 2nd entry.
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//
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Status = gBS->LocateProtocol (&gEfiCallerIdGuid, NULL, &Interface);
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if (!EFI_ERROR (Status)) {
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DEBUG ((DEBUG_INFO, "FspNotifyDxe - 2nd entry\n"));
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return EFI_SUCCESS;
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}
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DEBUG ((DEBUG_INFO, "FspNotifyDxe - 1st entry\n"));
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//
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// Here we install a dummy handle
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//
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NewImageHandle = NULL;
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Status = gBS->InstallProtocolInterface (
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&NewImageHandle,
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&gEfiCallerIdGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Reload image itself to <4G mem
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//
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Status = GetSectionFromAnyFv (
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&gEfiCallerIdGuid,
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EFI_SECTION_PE32,
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0,
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(VOID **) &Buffer,
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&BufferSize
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);
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ASSERT_EFI_ERROR (Status);
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ImageContext.Handle = Buffer;
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ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
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//
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// Get information about the image being loaded
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//
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Status = PeCoffLoaderGetImageInfo (&ImageContext);
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ASSERT_EFI_ERROR (Status);
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if (ImageContext.SectionAlignment > EFI_PAGE_SIZE) {
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Pages = EFI_SIZE_TO_PAGES ((UINTN) (ImageContext.ImageSize + ImageContext.SectionAlignment));
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} else {
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Pages = EFI_SIZE_TO_PAGES ((UINTN) ImageContext.ImageSize);
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}
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FfsBuffer = 0xFFFFFFFF;
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Status = gBS->AllocatePages (
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AllocateMaxAddress,
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EfiBootServicesCode,
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Pages,
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&FfsBuffer
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);
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ASSERT_EFI_ERROR (Status);
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ImageContext.ImageAddress = (PHYSICAL_ADDRESS)(UINTN)FfsBuffer;
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//
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// Align buffer on section boundary
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//
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ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;
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ImageContext.ImageAddress &= ~((EFI_PHYSICAL_ADDRESS)ImageContext.SectionAlignment - 1);
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//
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// Load the image to our new buffer
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//
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Status = PeCoffLoaderLoadImage (&ImageContext);
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ASSERT_EFI_ERROR (Status);
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//
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// Relocate the image in our new buffer
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//
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Status = PeCoffLoaderRelocateImage (&ImageContext);
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ASSERT_EFI_ERROR (Status);
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//
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// Free the buffer allocated by ReadSection since the image has been relocated in the new buffer
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//
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gBS->FreePool (Buffer);
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//
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// Flush the instruction cache so the image data is written before we execute it
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//
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InvalidateInstructionCacheRange ((VOID *)(UINTN)ImageContext.ImageAddress, (UINTN)ImageContext.ImageSize);
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DEBUG ((DEBUG_INFO, "Loading driver at 0x%08x EntryPoint=0x%08x\n", (UINTN)ImageContext.ImageAddress, (UINTN)ImageContext.EntryPoint));
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Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)(ImageContext.EntryPoint)) (NewImageHandle, gST);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "Error: Image at 0x%08x start failed: %r\n", ImageContext.ImageAddress, Status));
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gBS->FreePages (FfsBuffer, Pages);
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}
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//
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// return error to unload >4G copy, if we already relocate itself to <4G.
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//
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return EFI_ALREADY_STARTED;
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}
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