vb script process nm.exe output for MS COFF extrn [DONE]

Index > Projects and Ideas > vb script process nm.exe output for MS COFF extrn [DONE]

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sleepsleep

Joined: 05 Oct 2006
Posts: 12934
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sleepsleep 17 Jun 2012, 15:49

hi,
this vb script will certainly help those who want to ld static link MinGW .a files with MS COFF output using Fasm.

http://obemsg.blogspot.com/2012/06/nmexe-output-extrn-for-fasm.html

to get list of functions of a .a file, use nm.exe ( available inside MinGW bin )
eg:
D:\MinGW\lib>nm -g libuser32.a > C:\nmlibuser32.txt

to parse the output file into proper extrn
eg:
ANSI
C:\>cscript.exe /nologo nm2extern.vbs C:\nmlibuser32.txt > libuser32a.inc
UNICODE
C:\>cscript.exe /nologo nm2extern.vbs C:\nmlibuser32.txt 1 > libuser32w.inc

version 2012-06-18-21-54

this version support those api that without @
eg.
00000000 I __imp__iupdrvWarpPointer

example output

Code:

ANSI
extrn '__imp__wvsprintfA@12' as wvsprintf:dword
extrn '__imp__mouse_event@20' as mouse_event:dword
extrn '__imp__keybd_event@16' as keybd_event:dword
extrn '__imp__WindowFromPoint@8' as WindowFromPoint:dword
extrn '__imp__WindowFromDC@4' as WindowFromDC:dword
extrn '__imp__WinHelpA@16' as WinHelp:dword
extrn '__imp__WaitMessage@0' as WaitMessage:dword
extrn '__imp__WaitForInputIdle@8' as WaitForInputIdle:dword
extrn '__imp__VkKeyScanExA@8' as VkKeyScanEx:dword
extrn '__imp__VkKeyScanA@4' as VkKeyScan:dword

UNICODE
extrn '__imp__wvsprintfW@12' as wvsprintf:dword
extrn '__imp__mouse_event@20' as mouse_event:dword
extrn '__imp__keybd_event@16' as keybd_event:dword
extrn '__imp__WindowFromPoint@8' as WindowFromPoint:dword
extrn '__imp__WindowFromDC@4' as WindowFromDC:dword
extrn '__imp__WinHelpW@16' as WinHelp:dword
extrn '__imp__WaitMessage@0' as WaitMessage:dword
extrn '__imp__WaitForInputIdle@8' as WaitForInputIdle:dword
extrn '__imp__VkKeyScanW@4' as VkKeyScan:dword
extrn '__imp__VkKeyScanExW@8' as VkKeyScanEx:dword

Description:	uploaded new version	Download
Filename:	nm2extern.zip
Filesize:	861 Bytes
Downloaded:	841 Time(s)

Last edited by sleepsleep on 18 Jun 2012, 14:34; edited 6 times in total

17 Jun 2012, 15:49

sleepsleep 17 Jun 2012, 16:29

it still bring some problem because some API is not available on windows XP, only in Windows 7. Sigh.

eg.
The procedure entry point GetTouchInputInfo could not be located in the dynamic link library USER32.dll.

17 Jun 2012, 16:29

sleepsleep 18 Jun 2012, 12:14

it seems extrn everything will cause our application grow large,

could anyone code a macro to include extrn based on what api found inside our asm code?

18 Jun 2012, 12:14

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20421
Location: In your JS exploiting you and your system

revolution 18 Jun 2012, 12:17

That would seem to be easy (untested):

Code:

macro extrn text, name, type {
  if used name
    extrn text as name:type
  end if
}

18 Jun 2012, 12:17

sleepsleep 18 Jun 2012, 12:21

Code:

format MS COFF
include 'win32ax.inc'

macro extrn text, name, type {
  if used name
    extrn text as name:type
  end if
}

include 'libkernel32axp.inc'
include 'libuser32axp.inc'

section '.text' code readable executable

 public _demo

Code:

flat assembler  version 1.70.02  (1572863 kilobytes memory)
D:\Fasm\INCLUDE/libkernel32axp.inc [1]:
extrn '__imp__lstrlenA@4' as lstrlen:dword
MSCOFF.ASM [8] extrn [1]:
  if used name
error: invalid expression.
make: *** [MSCOFF.OBJ] Error 2

18 Jun 2012, 12:21

sleepsleep 18 Jun 2012, 12:22

or revolution, you want me to change the format of those extern file?

18 Jun 2012, 12:22

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20421
Location: In your JS exploiting you and your system

revolution 18 Jun 2012, 12:30

Oh. Try this:

Code:

macro extrn stuff {
  match text =as name:type,stuff \{
    if used name
      extrn text as name:type
    end if
  \}
}

18 Jun 2012, 12:30

sleepsleep 18 Jun 2012, 12:34

awesome, it seems works!!!!

damn it, i edit the xp api manually one by one yesterday night, LMFAO...

18 Jun 2012, 12:34

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20421
Location: In your JS exploiting you and your system

revolution 18 Jun 2012, 12:46

sleepsleep wrote:

damn it, i edit the xp api manually one by one yesterday night, LMFAO...

Never underestimate the power of the macro.

18 Jun 2012, 12:46

sleepsleep 18 Jun 2012, 12:47

gonna start understand how those macro works.

btw, thanks!! Smile

it just awesome!

18 Jun 2012, 12:47

rugxulo

Joined: 09 Aug 2005
Posts: 2341
Location: Usono (aka, USA)

rugxulo 05 Jul 2012, 21:17

s/When all else fails, read the source/Never underestimate the power of the macro./

Laughing

05 Jul 2012, 21:17

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20421
Location: In your JS exploiting you and your system

revolution 06 Jul 2012, 13:00

rugxulo wrote:

s/When all else fails, read the source/Never underestimate the power of the macro./

Or maybe:

s/When all else fails, read the source/When all else fails, read the instructions/

06 Jul 2012, 13:00

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