Mega Code Archive
Get the list of functions exported by a Dll module
<![CDATA[
Title: Get the list of functions exported by a Dll module.
Question: How to get the list of functions exported by a Dll module.
Answer:
To get the list of functions exported by a Dll module you need to use the following functions.
MapAndLoad function in 'imagehlp.pas'.
ImageRvaToVa function in 'imagehlp.pas'.
You also need to define the following structures.
To find details about what the members of these structures mean visit the web page 'http://www.csn.ul.ie/~caolan/publink/winresdump/winresdump/doc/msdn_peeringpe.html'
const
IMAGE_SIZEOF_SHORT_NAME = 8;
IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16;
IMAGE_DATA_DIRECTORY = packed record
VirtualAddress : DWORD;
Size : DWORD;
PIMAGE_DATA_DIRECTORY = ^IMAGE_DATA_DIRECTORY;
IMAGE_SECTION_HEADER = packed record
Name : packed array [0..IMAGE_SIZEOF_SHORT_NAME-1] of Char;
PhysicalAddress : DWORD; // or VirtualSize (union);
VirtualAddress : DWORD;
SizeOfRawData : DWORD;
PointerToRawData : DWORD;
PointerToRelocations : DWORD;
PointerToLinenumbers : DWORD;
NumberOfRelocations : WORD;
NumberOfLinenumbers : WORD;
Characteristics : DWORD;
end;
PIMAGE_SECTION_HEADER = ^IMAGE_SECTION_HEADER;
IMAGE_OPTIONAL_HEADER = packed record
{ Standard fields. }
Magic : WORD;
MajorLinkerVersion : Byte;
MinorLinkerVersion : Byte;
SizeOfCode : DWORD;
SizeOfInitializedData : DWORD;
SizeOfUninitializedData : DWORD;
AddressOfEntryPoint : DWORD;
BaseOfCode : DWORD;
BaseOfData : DWORD;
{ NT additional fields. }
ImageBase : DWORD;
SectionAlignment : DWORD;
FileAlignment : DWORD;
MajorOperatingSystemVersion : WORD;
MinorOperatingSystemVersion : WORD;
MajorImageVersion : WORD;
MinorImageVersion : WORD;
MajorSubsystemVersion : WORD;
MinorSubsystemVersion : WORD;
Reserved1 : DWORD;
SizeOfImage : DWORD;
SizeOfHeaders : DWORD;
CheckSum : DWORD;
Subsystem : WORD;
DllCharacteristics : WORD;
SizeOfStackReserve : DWORD;
SizeOfStackCommit : DWORD;
SizeOfHeapReserve : DWORD;
SizeOfHeapCommit : DWORD;
LoaderFlags : DWORD;
NumberOfRvaAndSizes : DWORD;
DataDirectory: packed array[0..IMAGE_NUMBEROF_DIRECTORY_ENTRIES-1] of IMAGE_DATA_DIRECTORY;
end;
PIMAGE_OPTIONAL_HEADER = ^IMAGE_OPTIONAL_HEADER;
IMAGE_FILE_HEADER = packed record
Machine : WORD;
NumberOfSections : WORD;
TimeDateStamp : DWORD;
PointerToSymbolTable : DWORD;
NumberOfSymbols : DWORD;
SizeOfOptionalHeader : WORD;
Characteristics : WORD;
end;
PIMAGE_FILE_HEADER = ^IMAGE_FILE_HEADER;
IMAGE_NT_HEADERS = packed record
Signature : DWORD;
FileHeader : IMAGE_FILE_HEADER;
OptionalHeader : IMAGE_OPTIONAL_HEADER;
end;
PIMAGE_NT_HEADERS = ^IMAGE_NT_HEADERS;
type LOADED_IMAGE = record
ModuleName:pchar;//name of module
hFile:thandle;//handle of file
MappedAddress:pchar;// the base address of mapped file
FileHeader:PIMAGE_NT_HEADERS;//The Header of the file.
LastRvaSection:PIMAGE_SECTION_HEADER;
NumberOfSections:integer;
Sections:PIMAGE_SECTION_HEADER ;
Characteristics:integer;
fSystemImage:boolean;
fDOSImage:boolean;
Links:LIST_ENTRY;
SizeOfImage:integer;
end;
PLOADED_IMAGE= ^LOADED_IMAGE;
here is the code
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, Menus,structures,imagehlp;
type
TForm1 = class(TForm)
ListBox1: TListBox;
MainMenu1: TMainMenu;
File1: TMenuItem;
Open1: TMenuItem;
OpenDialog1: TOpenDialog;
ListBox2: TListBox;
procedure Open1Click(Sender: TObject);
private
public
procedure DLLFuncstoList(fname:string;alistbox:tlistbox);
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.DLLFuncstoList(fname:string;alistbox:tlistbox);
var
fih:LOADED_IMAGE;
pexpdir:PIMAGE_EXPORT_DIRECTORY;
pexpnames:pdword;//pointer to list of exported fucntions
pt1:PImageSectionHeader;
i:integer;
exportedfuncname:pchar;//exported function name
begin
alistbox.items.clear;
pt1:=nil;
MapAndLoad(pchar(fname),pchar('#0'),@fih,true,true);//load the
file into memory.
pExpDir:=PIMAGE_EXPORT_DIRECTORY(fih.FileHeader.OptionalHeader.
DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
pExpDir:=PIMAGE_EXPORT_DIRECTORY(ImageRvaToVa
(fih.FileHeader,fih.MappedAddress,DWORD(pExpDir),pt1));
pExpNames:= pExpDir.pAddressOfNames;
pExpNames:=PDWORD(ImageRvaToVa
(fih.FileHeader,fih.MappedAddress,dword(pExpNames),pt1));
pt1:=nil;
for i:=0 to pexpdir.NumberOfNames-1 do
begin
exportedfuncname:=pchar(ImageRvaToVa
(fih.FileHeader,fih.MappedAddress,dword(pExpNames^),pt1));
alistbox.items.add(exportedfuncname);
inc(pexpnames);
end;
UnMapAndLoad(@fih);//Un load the mapped file from memory.
end;
procedure TForm1.Open1Click(Sender: TObject);
var
begin
if opendialog1.execute = true then
begin
DLLFuncstoList(opendialog1.filename,listbox1);
end;
end;
end.
]]>