typedef struct _IMAGE_FILE_HEADER
{
+04h WORD Machine; // 运行平台
+06h WORD NumberOfSections; // 文件的区块数目
+08h DWORD TimeDateStamp; // 文件创建日期和时间
+0Ch DWORD PointerToSymbolTable; // 指向符号表(主要用于调试)
+10h DWORD NumberOfSymbols; // 符号表中符号个数(同上)
+14h WORD SizeOfOptionalHeader; // IMAGE_OPTIONAL_HEADER32 结构大小
+16h WORD Characteristics; // 文件属性
} IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER;
该结构如下图所示：
下边，小甲鱼童鞋为大家详细解释各个成员的含义和用法：
（1）Machine：可执行文件的目标CPU类型。
| Value | Meaning |
|---|
- IMAGE_FILE_MACHINE_I386
- 0x014c
|
x86
|
- IMAGE_FILE_MACHINE_IA64
- 0x0200
|
Intel Itanium
|
- IMAGE_FILE_MACHINE_AMD64
- 0x8664
|
x64
|
（2）NumberOfSection: 区块的数目。（注：区块表是紧跟在 IMAGE_NT_HEADERS 后边的）
（3）TimeDataStamp: 表明文件是何时被创建的。
提示：VC的话可以用_ctime 函数或者 gmtime 函数。
（4）PointerToSymbolTable: COFF 符号表的文件偏移位置，现在基本没用了。
（5）NumberOfSymbols: 如果有COFF 符号表，它代表其中的符号数目，COFF符号是一个大小固定的结构，如果想找到COFF 符号表的结束位置，则需要这个变量。
（6）SizeOfOptionalHeader: 紧跟着IMAGE_FILE_HEADER 后边的数据结构（IMAGE_OPTIONAL_HEADER）的大小。(对于32位PE文件，这个值通常是00E0h；对于64位PE32+文件，这个值是00F0h )。
（7）Characteristics: 文件属性，有选择的通过几个值可以运算得到。( 这些标志的有效值是定义于 winnt.h 内的 IMAGE_FILE_** 的值，具体含义见下表。普通的EXE文件这个字段的值一般是 0100h，DLL文件这个字段的值一般是 210Eh。)小甲鱼温馨提示：多种属性可以通过 “或运算” 使得同时拥有！
| Value | Meaning |
|---|
- IMAGE_FILE_RELOCS_STRIPPED
- 0x0001
|
Relocation information was stripped from the
file. The file must be loaded at its preferred
base address. If the base address is not
available, the loader reports an error.
|
- IMAGE_FILE_EXECUTABLE_IMAGE
- 0x0002
|
The file is executable (there are no unresolved
external references).
|
- IMAGE_FILE_LINE_NUMS_STRIPPED
- 0x0004
|
COFF line numbers were stripped from the
file.
|
- IMAGE_FILE_LOCAL_SYMS_STRIPPED
- 0x0008
|
COFF symbol table entries were stripped from
file.
|
- IMAGE_FILE_AGGRESIVE_WS_TRIM
- 0x0010
|
Aggressively trim the working set. This value is
obsolete as of Windows 2000.
|
- IMAGE_FILE_LARGE_ADDRESS_AWARE
- 0x0020
|
The application can handle addresses larger
than 2 GB.
|
- IMAGE_FILE_BYTES_REVERSED_LO
- 0x0080
|
The bytes of the word are reversed. This flag
is obsolete.
|
- IMAGE_FILE_32BIT_MACHINE
- 0x0100
|
The computer supports 32-bit words.
|
- IMAGE_FILE_DEBUG_STRIPPED
- 0x0200
|
Debugging information was removed and stored
separately in another file.
|
- IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP
- 0x0400
|
If the image is on removable media, copy it to
and run it from the swap file.
|
- IMAGE_FILE_NET_RUN_FROM_SWAP
- 0x0800
|
If the image is on the network, copy it to and
run it from the swap file.
|
- IMAGE_FILE_SYSTEM
- 0x1000
|
The image is a system file.
|
- IMAGE_FILE_DLL
- 0x2000
|
The image is a DLL file. While it is an executable
file, it cannot be run directly.
|
- IMAGE_FILE_UP_SYSTEM_ONLY
- 0x4000
|
The file should be run only on a uniprocessor
computer.
|
- IMAGE_FILE_BYTES_REVERSED_HI
- 0x8000
|
The bytes of the word are reversed. This flag
is obsolete.
|
