1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef COURGETTE_TYPES_WIN_PE_H_
6 #define COURGETTE_TYPES_WIN_PE_H_
7 
8 #include <stddef.h>
9 #include <stdint.h>
10 
11 namespace courgette {
12 
13 // PE file section header.  This struct has the same layout as the
14 // IMAGE_SECTION_HEADER structure from WINNT.H
15 // http://msdn.microsoft.com/en-us/library/ms680341(VS.85).aspx
16 //
17 #pragma pack(push, 1)  // Supported by MSVC and GCC. Ensures no gaps in packing.
18 struct Section {
19   char name[8];
20   uint32_t virtual_size;
21   uint32_t virtual_address;
22   uint32_t size_of_raw_data;
23   uint32_t file_offset_of_raw_data;
24   uint32_t pointer_to_relocations;   // Always zero in an image.
25   uint32_t pointer_to_line_numbers;  // Always zero in an image.
26   uint16_t number_of_relocations;    // Always zero in an image.
27   uint16_t number_of_line_numbers;   // Always zero in an image.
28   uint32_t characteristics;
29 };
30 #pragma pack(pop)
31 
32 static_assert(sizeof(Section) == 40, "section size is 40 bytes");
33 
34 // ImageDataDirectory has same layout as IMAGE_DATA_DIRECTORY structure from
35 // WINNT.H
36 // http://msdn.microsoft.com/en-us/library/ms680305(VS.85).aspx
37 //
38 class ImageDataDirectory {
39  public:
ImageDataDirectory()40   ImageDataDirectory() : address_(0), size_(0) {}
41   RVA address_;
42   uint32_t size_;
43 };
44 
45 static_assert(sizeof(ImageDataDirectory) == 8,
46               "image data directory size is 8 bytes");
47 
48 
49 ////////////////////////////////////////////////////////////////////////////////
50 
51 // Constants and offsets gleaned from WINNT.H and various articles on the
52 // format of Windows PE executables.
53 
54 // This is FIELD_OFFSET(IMAGE_DOS_HEADER, e_lfanew):
55 const size_t kOffsetOfFileAddressOfNewExeHeader = 0x3c;
56 
57 const uint16_t kImageNtOptionalHdr32Magic = 0x10b;
58 const uint16_t kImageNtOptionalHdr64Magic = 0x20b;
59 
60 const size_t kSizeOfCoffHeader = 20;
61 const size_t kMinPeHeaderSize = 4 /*signature*/ + kSizeOfCoffHeader;
62 const size_t kOffsetOfDataDirectoryFromImageOptionalHeader32 = 96;
63 const size_t kOffsetOfDataDirectoryFromImageOptionalHeader64 = 112;
64 
65 }  // namespace courgette
66 
67 #endif  // COURGETTE_TYPES_WIN_PE_H_
68