Get import table of a running process

"import table" may contain not all DLLs. How about DLLs loaded by LoadLibrary?

Could you tell more detailed what do you want to make?

GloomyFriar, thank you for your comments.
How about DLLs linked static (not loaded by LoadLibrary). Is there a way to get this DLLs via "import table"?

More details? I have a DLL file. I want to know if a processes (somethimes with comressed .exe files) needs this DLL file (static linked).

DaFox, I think ImgWalk.dll use EnumProcessModules or Module32First and enumerate also injected DLLs.

>> I think ImgWalk.dll use EnumProcessModules or Module32First

nope, it uses VirtualQuery that fills the MEMORY_BASIC_INFORMATION structure.

>> injected DLLs

that's right, and therefore it also gets dynamically loaded dlls.

Markus

>How about DLLs linked static (not loaded by LoadLibrary). Is there a way to get this DLLs via "import table"?
Yes of course.
You just need to open the exe file and read its PE header.

Something like that (it work with running exe, but you can do the same with a file):

function FindUsablePage(hProcess: THANDLE; PProcessBase: pointer): pointer;
var peHdrOffset: DWORD;
    cBytesMoved: DWORD;
    ntHdr: IMAGE_NT_HEADERS;
    pSection: ^IMAGE_SECTION_HEADER;
    i: ULONG;
    tmpPtr: PBYTE;
    section: IMAGE_SECTION_HEADER;
    SecName: string;
begin
   Result := nil;

   // Read in the offset of the PE header within the debuggee
   tmpPtr := PBYTE(PProcessBase);
   inc(tmpPtr, $3C);
   if ReadProcessMemory(ProcessInformation.hProcess,
                        tmpPtr,
                        @peHdrOffset,
                        sizeof(peHdrOffset),
                        cBytesMoved) = False then Exit;

   // Read in the IMAGE_NT_HEADERS.OptionalHeader.BaseOfCode field
   tmpPtr := PBYTE(PProcessBase);
   inc(tmpPtr, peHdrOffset);
   if ReadProcessMemory(ProcessInformation.hProcess,
                        tmpPtr, @ntHdr, sizeof(ntHdr),
                        cBytesMoved) = False then Exit;

   tmpPtr := PBYTE(PProcessBase);
   inc(tmpPtr, peHdrOffset + 4 + sizeof(ntHdr.FileHeader) +
       ntHdr.FileHeader.SizeOfOptionalHeader);
   pSection := pointer(tmpPtr);//(PIMAGE_SECTION_HEADER)

  for i:=0 to Pred(ntHdr.FileHeader.NumberOfSections) do begin
     //{IMAGE_SECTION_HEADER section;
     if ReadProcessMemory(ProcessInformation.hProcess,
                          pSection, @section, sizeof(section),
                          cBytesMoved) = False then Exit;
     // OutputDebugString( "trying section:
     // OutputDebugString( section.Name )'
     // OutputDebugString( "\r\n" )'

     SecName := StrPas(@section.Name[0]);
     // If it's writeable, and not the .idata section, we'll go with it
     if(((section.Characteristics and IMAGE_SCN_MEM_WRITE) <> 0) and
        (StrLComp(@section.Name[0], '.idata', 6) <> 0)) then begin
         OutputDebugString(PChar('using section.' + StrPas(@section.Name[0]) + #10 + #13));
        Result := pointer(DWORD(PProcessBase) + section.VirtualAddress);
        //Exit;
     end;
     Inc(pSection); // Not this section. Advance to next section.
  end;
end;

You can read about PE format here:

http://msdn.microsoft.com/msdnmag/issues/02/02/PE/default.aspx

Here is the code that read exports, but it's rather easy to make it read imports.
If any problems I'll can help tomorrow.

http://www.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_20079575.html

Hi GloomyFriar, thank you for your FindUsablePage source and the other links. I will check it.

> You just need to open the exe file and read its PE header.
This is not usefull, if the .exe file is compressed.