(gelöst)The DLL file isn't working—who can help me?

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Harald2026

Joined: 13 Apr 2026
Posts: 9

Harald2026 11 May 2026, 16:29

Hallo Leute

Dieses DLL Programm lässt sich starten aber er vermittelt nur eine null als Ergebnis.
Was hab ich da falsch gemacht ???

TestA wird übergeben und sollte 16 als Ergebnis bringen

Hi everyone,

This DLL program launches successfully, but it only returns a zero as the result.
What did I do wrong here?

TestA is passed as input and should yield 16 as the result.

format PE64 console DLL
entry DllEntryPoint

include 'win64a.inc'

section '.text' code readable executable

proc DllEntryPoint hinstDLL,fdwReason,lpvReserved
mov eax,TRUE
ret
endp

; Funktion: Add(a, b) -> eax = a + b
proc AddHar , TestA

mov RAX,[TestA]
ADD rax,0x00000010
MOV [TestA],rax
ret

endp

;section '.bss' data readable writeable
;TestA dq ?

section '.edata' export data readable writeable

export 'TestH.DLL',\
AddHar, 'AddHar'

section '.reloc' fixups data readable discardable

if $=$$
dd 0,8 ; if there are no fixups, generate dummy entry
end if

;section '.idata' import data readable writeable

;library kernel32,'KERNEL32.DLL'

;include 'api/kernel32.inc'

invoke AddHar ,TestA ;warum ????? DLL geht nicht !!!!
MOV RAX,[TestA] (TestA = 0)

Description:		Download
Filename:	TestH.asm
Filesize:	808 Bytes
Downloaded:	7 Time(s)

Last edited by Harald2026 on 12 May 2026, 10:24; edited 3 times in total

11 May 2026, 16:29

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20976
Location: In your JS exploiting you and your system

revolution 11 May 2026, 16:35

404: DLL not found.

Please post the sources.

11 May 2026, 16:35

Core i7

Joined: 14 Nov 2024
Posts: 164
Location: Socket on motherboard

Core i7 11 May 2026, 17:20

In x64 arguments are passed through the rcx, rdx, r8, and r9 registers, so the "TestA" input parameter is empty (=0). Rewrite the procedure like this, and everything should work correctly:

Code:

proc  AddHar uses rbx rsi rdi, TestA
      mov    [TestA],rcx

      mov    rax,[TestA]
      add    rax,0x10      ;// RAX = result
      ret
endp
;//-----------------------------
;// Or just read RCX:
;//-----------------------------
proc  AddHar uses rbx rsi rdi
      mov    rax,rcx
      add    rax,0x10
      ret
endp

11 May 2026, 17:20

Core i7

Joined: 14 Nov 2024
Posts: 164
Location: Socket on motherboard

Core i7 11 May 2026, 18:25

For example: DLL library

Code:

format  pe64 console dll
include 'win64ax.inc'
entry   DllEntry
;//-------------
section '.text' code readable executable
proc DllEntry uses rbx rsi rdi, hDLL,Reason,Rsv
        mov     eax,1
        ret
endp

align 16
proc  AddHar uses rbx rsi rdi
        mov     rax,rcx
        add     rax,0x10
        ret
endp
;//-------------
section '.edata' export data readable writeable
export  'TestH.dll',AddHar,'AddHar'
;//-------------
section '.reloc' fixups data discardable
if      $=$$
        dd      0,8
end if

And application:

Code:

format  pe64 console
include 'win64ax.inc'
entry start
;//-------------
.data
buff    dq  0
;//-------------
section '.text' code readable executable
start:  sub     rsp,8
       cinvoke  printf,<10,' Enter dec value:  ',0>
       cinvoke  scanf,'%llu',buff

        mov     rcx,[buff]
      stdcall   [AddHar]

        xchg    rdx,rax
       cinvoke  printf,<   ' Result.........:  %llu',0>,rdx

       cinvoke  getch
       cinvoke  exit,0

section '.idata' import data readable writeable
library  msvcrt,'msvcrt.dll',TestH,'TestH.dll'
import   msvcrt,printf,'printf',scanf,'scanf',\
                getch,'_getch', exit, 'exit'
import   TestH, AddHar,'AddHar'

Description:
Filesize:	1016 Bytes
Viewed:	121 Time(s)

11 May 2026, 18:25

Harald2026

Joined: 13 Apr 2026
Posts: 9

Harald2026 11 May 2026, 21:19

Ich schau mir das mal an. Vielen Dank in voraus...

I'll take a look at that. Thanks in advance...

11 May 2026, 21:19

Harald2026

Joined: 13 Apr 2026
Posts: 9

Harald2026 12 May 2026, 10:16

Hallo , mit ein wenig Änderungen hat es endlich Funktioniert , danke dir für deine Hilfe

Hello, with a few minor changes, it finally worked—thank you for your help!

format pe64 console dll
include 'win64ax.inc'
entry DllEntry
;//-------------

section '.text' code readable executable
proc DllEntry uses rbx rsi rdi, hDLL,Reason,Rsv
mov eax,1
ret
endp

align 16
proc AddHar uses rbx rsi rdi
mov rax,rcx
add rax,32768
ret
endp
;//-----------------------------
;// Or just read RCX:
;//-----------------------------

;//-------------
section '.edata' export data readable writeable
export 'TestH.dll',AddHar,'AddHar'
;//-------------
section '.reloc' fixups data discardable
if $=$$
dd 0,8
end if

MYPrrogramm eingesetzt

CMP [STOPCode],0
JNE FGH
;cinvoke scanf,'%llu',TestA
MOV RCX,[TestA]
stdcall [AddHar] ;warum ????? DLL geht nicht !!!!
;MOV rdx,rax
MOV [TestA],rax

FGH:

12 May 2026, 10:16

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