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/** @file
Locate the entry point for the PEI Core
Copyright (c) 2008 - 2009, Intel Corporation
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 <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include "SecMain.h"
VOID
EFIAPI
FindPeiCoreEntryPoint (
IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,
OUT VOID **PeiCoreEntryPoint
)
{
EFI_STATUS Status;
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;
*PeiCoreEntryPoint = NULL;
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;
}
File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;
Size = *(UINT32*) File->Size & 0xffffff;
if (Size < (sizeof (*File) + sizeof (*Section))) {
return;
}
EndOfFile = CurrentAddress + Size;
if (EndOfFile > EndOfFirmwareVolume) {
return;
}
//
// Look for PEI Core files
//
if (File->Type != EFI_FV_FILETYPE_PEI_CORE) {
continue;
}
//
// Loop through the FFS file sections within the PEI Core FFS file
//
EndOfSection = (EFI_PHYSICAL_ADDRESS)(UINTN) (File + 1);
for (;;) {
CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;
Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;
Size = *(UINT32*) Section->Size & 0xffffff;
if (Size < sizeof (*Section)) {
return;
}
EndOfSection = CurrentAddress + Size;
if (EndOfSection > EndOfFile) {
return;
}
//
// Look for executable sections
//
if (Section->Type == EFI_SECTION_PE32) {
Status = PeCoffLoaderGetEntryPoint ((VOID*) (Section + 1), PeiCoreEntryPoint);
if (!EFI_ERROR (Status)) {
return;
}
}
}
}
}
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