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/** @file
Locate the entry point for the PEI Core
Copyright (c) 2013, 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
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 <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include "SecMain.h"
/**
Find core image base.
@param BootFirmwareVolumePtr Point to the boot firmware volume.
@param SecCoreImageBase The base address of the SEC core image.
@param PeiCoreImageBase The base address of the PEI core image.
**/
EFI_STATUS
EFIAPI
FindImageBase (
IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,
OUT EFI_PHYSICAL_ADDRESS *SecCoreImageBase,
OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase
)
{
EFI_PHYSICAL_ADDRESS CurrentAddress;
EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;
EFI_FFS_FILE_HEADER *File;
UINT32 Size;
EFI_PHYSICAL_ADDRESS EndOfFile;
EFI_COMMON_SECTION_HEADER *Section;
EFI_PHYSICAL_ADDRESS EndOfSection;
*SecCoreImageBase = 0;
*PeiCoreImageBase = 0;
CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) BootFirmwareVolumePtr;
EndOfFirmwareVolume = CurrentAddress + BootFirmwareVolumePtr->FvLength;
//
// Loop through the FFS files in the Boot Firmware Volume
//
for (EndOfFile = CurrentAddress + BootFirmwareVolumePtr->HeaderLength; ; ) {
CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;
if (CurrentAddress > EndOfFirmwareVolume) {
return EFI_NOT_FOUND;
}
File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;
if (IS_FFS_FILE2 (File)) {
Size = FFS_FILE2_SIZE (File);
if (Size <= 0x00FFFFFF) {
return EFI_NOT_FOUND;
}
} else {
Size = FFS_FILE_SIZE (File);
if (Size < sizeof (EFI_FFS_FILE_HEADER)) {
return EFI_NOT_FOUND;
}
}
EndOfFile = CurrentAddress + Size;
if (EndOfFile > EndOfFirmwareVolume) {
return EFI_NOT_FOUND;
}
//
// Look for SEC Core / PEI Core files
//
if (File->Type != EFI_FV_FILETYPE_SECURITY_CORE &&
File->Type != EFI_FV_FILETYPE_PEI_CORE) {
continue;
}
//
// Loop through the FFS file sections within the FFS file
//
if (IS_FFS_FILE2 (File)) {
EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER2));
} else {
EndOfSection = (EFI_PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) File + sizeof (EFI_FFS_FILE_HEADER));
}
for (;;) {
CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;
Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;
if (IS_SECTION2 (Section)) {
Size = SECTION2_SIZE (Section);
if (Size <= 0x00FFFFFF) {
return EFI_NOT_FOUND;
}
} else {
Size = SECTION_SIZE (Section);
if (Size < sizeof (EFI_COMMON_SECTION_HEADER)) {
return EFI_NOT_FOUND;
}
}
EndOfSection = CurrentAddress + Size;
if (EndOfSection > EndOfFile) {
return EFI_NOT_FOUND;
}
//
// Look for executable sections
//
if (Section->Type == EFI_SECTION_PE32 || Section->Type == EFI_SECTION_TE) {
if (File->Type == EFI_FV_FILETYPE_SECURITY_CORE) {
if (IS_SECTION2 (Section)) {
*SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2));
} else {
*SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER));
}
} else {
if (IS_SECTION2 (Section)) {
*PeiCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER2));
} else {
*PeiCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) ((UINT8 *) Section + sizeof (EFI_COMMON_SECTION_HEADER));
}
}
break;
}
}
//
// Both SEC Core and PEI Core images found
//
if (*SecCoreImageBase != 0 && *PeiCoreImageBase != 0) {
return EFI_SUCCESS;
}
}
}
/**
Find and return Pei Core entry point.
It also find SEC and PEI Core file debug inforamtion. It will report them if
remote debug is enabled.
@param BootFirmwareVolumePtr Point to the boot firmware volume.
@param PeiCoreEntryPoint The entry point of the PEI core.
**/
VOID
EFIAPI
FindAndReportEntryPoints (
IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,
OUT EFI_PEI_CORE_ENTRY_POINT *PeiCoreEntryPoint
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS SecCoreImageBase;
EFI_PHYSICAL_ADDRESS PeiCoreImageBase;
PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
//
// Find SEC Core and PEI Core image base
//
Status = FindImageBase (BootFirmwareVolumePtr, &SecCoreImageBase, &PeiCoreImageBase);
ASSERT_EFI_ERROR (Status);
ZeroMem ((VOID *) &ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));
//
// Report SEC Core debug information when remote debug is enabled
//
ImageContext.ImageAddress = SecCoreImageBase;
ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
//
// Report PEI Core debug information when remote debug is enabled
//
ImageContext.ImageAddress = PeiCoreImageBase;
ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
//
// Find PEI Core entry point
//
Status = PeCoffLoaderGetEntryPoint ((VOID *) (UINTN) PeiCoreImageBase, (VOID**) PeiCoreEntryPoint);
if (EFI_ERROR (Status)) {
*PeiCoreEntryPoint = 0;
}
return;
}
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