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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BasePeCoffGetEntryPointLib/PeCoffGetEntryPoint.c
b740bd6e7c4a007448d65ec192e9ac01354953f4
4 Copyright (c) 2006, Intel Corporation<BR>
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13 Module Name: PeCoffGetEntryPoint.c
20 Retrieves and returns a pointer to the entry point to a PE/COFF image that has been loaded
21 into system memory with the PE/COFF Loader Library functions.
23 Retrieves the entry point to the PE/COFF image specified by Pe32Data and returns this entry
24 point in EntryPoint. If the entry point could not be retrieved from the PE/COFF image, then
25 return RETURN_INVALID_PARAMETER. Otherwise return RETURN_SUCCESS.
26 If Pe32Data is NULL, then ASSERT().
27 If EntryPoint is NULL, then ASSERT().
29 @param Pe32Data Pointer to the PE/COFF image that is loaded in system memory.
30 @param EntryPoint Pointer to entry point to the PE/COFF image to return.
32 @retval RETURN_SUCCESS EntryPoint was returned.
33 @retval RETURN_INVALID_PARAMETER The entry point could not be found in the PE/COFF image.
38 PeCoffLoaderGetEntryPoint (
43 EFI_IMAGE_DOS_HEADER
*DosHeader
;
44 EFI_IMAGE_NT_HEADERS
*PeHeader
;
46 ASSERT (Pe32Data
!= NULL
);
47 ASSERT (EntryPoint
!= NULL
);
49 DosHeader
= (EFI_IMAGE_DOS_HEADER
*)Pe32Data
;
51 if (DosHeader
->e_magic
== EFI_IMAGE_DOS_SIGNATURE
) {
53 // DOS image header is present, so read the PE header after the DOS image header.
55 PeHeader
= (EFI_IMAGE_NT_HEADERS
*) ((UINTN
) Pe32Data
+ (UINTN
) ((DosHeader
->e_lfanew
) & 0x0ffff));
58 // DOS image header is not present, so PE header is at the image base.
60 PeHeader
= (EFI_IMAGE_NT_HEADERS
*) Pe32Data
;
63 *EntryPoint
= (VOID
*) ((UINTN
) Pe32Data
+ (UINTN
) (PeHeader
->OptionalHeader
.AddressOfEntryPoint
& 0x0ffffffff));
64 return RETURN_SUCCESS
;