Image.c revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/** @file
Pei Core Load Image Support
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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
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 "PeiMain.h"
};
};
/**
The function is used for XIP code to have optimized memory copy.
@param FileOffset - The offset, in bytes, into the file to read
@param ReadSize - The number of bytes to read from the file starting at FileOffset
@param Buffer - A pointer to the buffer to read the data into.
@return EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset
**/
)
{
if (Destination8 != Source8) {
}
return EFI_SUCCESS;
}
/**
The function is implemented as PIC so as to support shadowing.
@param FileOffset - The offset, in bytes, into the file to read
@param ReadSize - The number of bytes to read from the file starting at FileOffset
@param Buffer - A pointer to the buffer to read the data into.
@return EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset
**/
)
{
volatile CHAR8 *Destination8;
if (Destination8 != Source8) {
while ((Length--) > 0) {
*(Destination8++) = *(Source8++);
}
}
return EFI_SUCCESS;
}
/**
Support routine to get the Image read file function.
@param ImageContext - The context of the image being loaded
@retval EFI_SUCCESS - If Image function location is found
**/
)
{
if ((Private->PeiMemoryInstalled && !(Private->HobList.HandoffInformationTable->BootMode == BOOT_ON_S3_RESUME)) &&
(EFI_IMAGE_MACHINE_TYPE_SUPPORTED(EFI_IMAGE_MACHINE_X64) || EFI_IMAGE_MACHINE_TYPE_SUPPORTED(EFI_IMAGE_MACHINE_IA32))) {
//
// Shadow algorithm makes lots of non ANSI C assumptions and only works for IA32 and X64
// compilers that have been tested
//
}
} else {
}
return EFI_SUCCESS;
}
/**
To check memory usage bit map arry to figure out if the memory range the image will be loaded in is available or not. If
memory range is avaliable, the function will mark the correponding bits to 1 which indicates the memory range is used.
The function is only invoked when load modules at fixed address feature is enabled.
@param Private Pointer to the private data passed in from caller
@param ImageBase The base addres the image will be loaded at.
@param ImageSize The size of the image
@retval EFI_SUCCESS The memory range the image will be loaded in is available
@retval EFI_NOT_FOUND The memory range the image will be loaded in is not available
**/
)
{
//
// The reserved code range includes RuntimeCodePage range, Boot time code range and PEI code range.
//
ReservedCodeSize = EFI_PAGES_TO_SIZE(DxeCodePageNumber + PcdGet32(PcdLoadFixAddressPeiCodePageNumber));
//
// Test the memory range for loading the image in the PEI code range.
//
if ((Private->LoadModuleAtFixAddressTopAddress - EFI_PAGES_TO_SIZE(DxeCodePageNumber)) < (ImageBase + ImageSize) ||
(PeiCodeBase > ImageBase)) {
return EFI_NOT_FOUND;
}
//
// Test if the memory is avalaible or not.
//
//
// This page is already used.
//
return EFI_NOT_FOUND;
}
}
//
// Being here means the memory range is available. So mark the bits for the memory range
//
}
return EFI_SUCCESS;
}
/**
Get the fixed loadding address from image header assigned by build tool. This function only be called
when Loading module at Fixed address feature enabled.
image that needs to be examined by this function.
@param Private Pointer to the private data passed in from caller
@retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .
@retval EFI_NOT_FOUND The image has no assigned fixed loadding address.
**/
)
{
FixLoaddingAddress = 0;
//
// Get PeHeader pointer
//
ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);
if (ImageContext->IsTeImage) {
//
// for TE image, the fix loadding address is saved in first section header that doesn't point
// to code section.
//
SectionHeaderOffset = sizeof (EFI_TE_IMAGE_HEADER);
} else {
SectionHeaderOffset = (UINTN)(
sizeof (UINT32) +
sizeof (EFI_IMAGE_FILE_HEADER) +
);
}
//
// Get base address from the first section header that doesn't point to code section.
//
//
// Read section header from file
//
Size = sizeof (EFI_IMAGE_SECTION_HEADER);
&Size,
);
return Status;
}
//
// Build tool will save the address in PointerToRelocations & PointerToLineNumbers fields in the first section header
// that doesn't point to code section in image header, as well as ImageBase field of image header. A notable thing is
// that for PEIM, the value in ImageBase field may not be equal to the value in PointerToRelocations & PointerToLineNumbers because
// for XIP PEIM, ImageBase field holds the image base address running on the Flash. And PointerToRelocations & PointerToLineNumbers
// hold the image base address when it is shadow to the memory. And there is an assumption that when the feature is enabled, if a
// module is assigned a loading address by tools, PointerToRelocations & PointerToLineNumbers fields should NOT be Zero, or
// else, these 2 fileds should be set to Zero
//
if (ValueInSectionHeader != 0) {
//
// Found first section header that doesn't point to code section.
//
//
// When LMFA feature is configured as Load Module at Fixed Absolute Address mode, PointerToRelocations & PointerToLineNumbers field
// hold the absolute address of image base runing in memory
//
} else {
//
// When LMFA feature is configured as Load Module at Fixed offset mode, PointerToRelocations & PointerToLineNumbers field
// hold the offset relative to a platform-specific top address.
//
FixLoaddingAddress = (EFI_PHYSICAL_ADDRESS)(Private->LoadModuleAtFixAddressTopAddress + (INT64)ValueInSectionHeader);
}
//
// Check if the memory range is avaliable.
//
Status = CheckAndMarkFixLoadingMemoryUsageBitMap (Private, FixLoaddingAddress, (UINT32) ImageContext->ImageSize);
//
// The assigned address is valid. Return the specified loadding address
//
}
}
break;
}
SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);
}
DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address 0x%11p. Status= %r \n", (VOID *)(UINTN)FixLoaddingAddress, Status));
return Status;
}
/**
If the image is not relocatable, it will not be loaded into memory and be loaded as XIP image.
@retval EFI_SUCCESS The file was loaded and relocated
**/
)
{
return Status;
}
//
// When Image has no reloc section, it can't be relocated into memory.
//
if (ImageContext.RelocationsStripped && (Private->PeiMemoryInstalled) && (Private->HobList.HandoffInformationTable->BootMode != BOOT_ON_S3_RESUME)) {
DEBUG ((EFI_D_INFO|EFI_D_LOAD, "The image at 0x%08x without reloc section can't be loaded into memory\n", (UINTN) Pe32Data));
}
//
// Set default base address to current image address.
//
//
// Allocate Memory for the image when memory is ready, boot mode is not S3, and image is relocatable.
//
if ((!ImageContext.RelocationsStripped) && (Private->PeiMemoryInstalled) && (Private->HobList.HandoffInformationTable->BootMode != BOOT_ON_S3_RESUME)) {
if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {
DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED ERROR: Failed to load module at fixed address. \n"));
//
// The PEIM is not assiged valid address, try to allocate page to load it.
//
ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) AllocatePages (EFI_SIZE_TO_PAGES ((UINT32) ImageContext.ImageSize));
}
} else {
ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) AllocatePages (EFI_SIZE_TO_PAGES ((UINT32) ImageContext.ImageSize));
}
if (ImageContext.ImageAddress == 0) {
return EFI_OUT_OF_RESOURCES;
}
//
// Skip the reserved space for the stripped PeHeader when load TeImage into memory.
//
if (ImageContext.IsTeImage) {
sizeof (EFI_TE_IMAGE_HEADER);
}
}
//
// Load the image to our new buffer
//
return Status;
}
//
// Relocate the image in our new buffer
//
return Status;
}
//
// Flush the instruction cache so the image data is written before we execute it
//
if ((!ImageContext.RelocationsStripped) && (Private->PeiMemoryInstalled) && (Private->HobList.HandoffInformationTable->BootMode != BOOT_ON_S3_RESUME)) {
InvalidateInstructionCacheRange ((VOID *)(UINTN)ImageContext.ImageAddress, (UINTN)ImageContext.ImageSize);
}
return EFI_SUCCESS;
}
/**
Loads a PEIM into memory for subsequent execution. If there are compressed
images or images that need to be relocated into memory for performance reasons,
this service performs that transformation.
@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation
@param FileHandle Pointer to the FFS file header of the image.
@param EntryPoint Pointer to entry point of specified image file for output.
@param AuthenticationState - Pointer to attestation authentication state of image.
@retval EFI_SUCCESS Image is successfully loaded.
@retval EFI_NOT_FOUND Fail to locate necessary PPI.
@retval EFI_UNSUPPORTED Image Machine Type is not supported.
**/
)
{
*EntryPoint = 0;
ImageSize = 0;
*AuthenticationState = 0;
} else {
}
//
// Try to find a first exe section (if PcdPeiCoreImageLoaderSearchTeSectionFirst
// is true, TE will be searched first).
//
);
//
// If we didn't find a first exe section, try to find the second exe section.
//
);
//
// PEI core only carry the loader function fro TE and PE32 executables
// If this two section does not exist, just return.
//
return Status;
}
}
//
// If memory is installed, perform the shadow operations
//
);
return Status;
}
//
// Got the entry point from the loaded Pe32Data
//
if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (Machine)) {
return EFI_UNSUPPORTED;
}
}
if (ImageAddressArg != NULL) {
}
if (ImageSizeArg != NULL) {
}
DEBUG_CODE_BEGIN ();
//
// Print debug message: Loading PEIM at 0x12345678 EntryPoint=0x12345688 Driver.efi
//
if (Machine != EFI_IMAGE_MACHINE_IA64) {
DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Loading PEIM at 0x%11p EntryPoint=0x%11p ", (VOID *)(UINTN)ImageAddress, (VOID *)(UINTN)*EntryPoint));
} else {
//
// For IPF Image, the real entry point should be print.
//
DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Loading PEIM at 0x%11p EntryPoint=0x%11p ", (VOID *)(UINTN)ImageAddress, (VOID *)(UINTN)(*(UINT64 *)(UINTN)*EntryPoint)));
}
//
// Print Module Name by PeImage PDB file name.
//
if (AsciiString != NULL) {
break;
}
}
if (Index != 0) {
}
}
}
DEBUG_CODE_END ();
return EFI_SUCCESS;
}
/**
The wrapper function of PeiLoadImageLoadImage().
@param This - Pointer to EFI_PEI_LOAD_FILE_PPI.
@param FileHandle - Pointer to the FFS file header of the image.
@param EntryPoint - Pointer to entry point of specified image file for output.
@param AuthenticationState - Pointer to attestation authentication state of image.
@return Status of PeiLoadImageLoadImage().
**/
)
{
return PeiLoadImageLoadImage (
);
}
/**
Check whether the input image has the relocation.
@retval TRUE Relocation is stripped.
@retval FALSE Relocation is not stripped.
**/
)
{
//
// DOS image header is present, so read the PE header after the DOS image header.
//
} else {
//
// DOS image header is not present, so PE header is at the image base.
//
}
//
// Three cases with regards to relocations:
// - Image has base relocs, RELOCS_STRIPPED==0 => image is relocatable
// - Image has no base relocs, RELOCS_STRIPPED==1 => Image is not relocatable
// - Image has no base relocs, RELOCS_STRIPPED==0 => Image is relocatable but
// has no base relocs to apply
// Obviously having base relocations with RELOCS_STRIPPED==1 is invalid.
//
// Look at the file header to determine if relocations have been stripped, and
// save this info in the image context for later use.
//
return TRUE;
} else {
return FALSE;
}
return TRUE;
} else {
return FALSE;
}
}
return FALSE;
}
/**
Routine to load image file for subsequent execution by LoadFile Ppi.
If any LoadFile Ppi is not found, the build-in support function for the PE32+/TE
XIP image format is used.
@param PeiServices - An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation
@param FileHandle - Pointer to the FFS file header of the image.
@param PeimState - The dispatch state of the input PEIM handle.
@param EntryPoint - Pointer to entry point of specified image file for output.
@param AuthenticationState - Pointer to attestation authentication state of image.
@retval EFI_SUCCESS - Image is successfully loaded.
@retval EFI_NOT_FOUND - Fail to locate necessary PPI
@retval Others - Fail to load file.
**/
)
{
//
// If any instances of PEI_LOAD_FILE_PPI are installed, they are called.
// one at a time, until one reports EFI_SUCCESS.
//
Index = 0;
do {
NULL,
);
);
//
// The shadowed PEIM must be relocatable.
//
if (PeimState == PEIM_STATE_REGISITER_FOR_SHADOW) {
if (IsStrip) {
return EFI_UNSUPPORTED;
}
}
//
// The image to be started must have the machine type supported by PeiCore.
//
ASSERT (EFI_IMAGE_MACHINE_TYPE_SUPPORTED (PeCoffLoaderGetMachineType ((VOID *) (UINTN) ImageAddress)));
if (!EFI_IMAGE_MACHINE_TYPE_SUPPORTED (PeCoffLoaderGetMachineType ((VOID *) (UINTN) ImageAddress))) {
return EFI_UNSUPPORTED;
}
return Status;
}
}
Index++;
return PpiStatus;
}
/**
Install Pei Load File PPI.
@param PrivateData - Pointer to PEI_CORE_INSTANCE.
@param OldCoreData - Pointer to PEI_CORE_INSTANCE.
**/
)
{
if (OldCoreData == NULL) {
//
// The first time we are XIP (running from FLASH). We need to remember the
// FLASH address so we can reinstall the memory version that runs faster
//
} else {
//
// 2nd time we are running from memory so replace the XIP version with the
// new memory version.
//
}
}