Bug 2462 – DMD creates a wrong DLL so loading a DLL in the context of another Process via loadlibrary will crash the remote process

DMD creates a wrong DLL. My code can be found here: http://tango.pastebin.com/f7037e2fe Further information: TestDll.dll (memaddress) 0x1000B786 (HEX) 8B0C 9E (ASM)MOV ECX,DWORD PTR DS:[ESI+EBX*4] changed to (memaddress) 0x1000B786 (HEX) 8B0E 90 (ASM)MOV ECX,DWORD PTR DS:[ESI] If I don't change it, it would crash with a access violation while trying to read 0x80**0009 ASM 0x1000B770 53 PUSH EBX 0x1000B771 8B4424 08 MOV EAX,DWORD PTR SS:[ESP+8] 0x1000B775 8B10 MOV EDX,DWORD PTR DS:[EAX] 0x1000B777 56 PUSH ESI 0x1000B778 3B51 04 CMP EDX,DWORD PTR DS:[ECX+4] 0x1000B77B 77 13 JA SHORT TestDll.1000B790 0x1000B77D 8D5A FF LEA EBX,DWORD PTR DS:[EDX-1] ; EBX will be set to FFFFFFFF 0x1000B780 C1EB 03 SHR EBX,3 ; EBX bits will be shifted 3 times to the right will be 1FFFFFFF 0x1000B783 50 PUSH EAX 0x1000B784 8B31 MOV ESI,DWORD PTR DS:[ECX] ; this is the right address 0x00A9000C 0x1000B786 8B0C9E MOV ECX,DWORD PTR DS:[ESI+EBX*4] ; EBX should be 00000000 at this point but ESI+EBX*4 is 0x80A90008 0x1000B789 E8 BE160000 CALL TestDll.1000CE4C Registers at 0x1000B786 EAX 10015D07 TestDll.10015D07 ECX 100185F4 TestDll.100185F4 EDX 00000000 EBX 1FFFFFFF ESP 00A8FE84 EBP 00A8FEAC ESI 00A9000C EDI 00000000 EIP 1000B786 TestDll.1000B786 C 1 ES 0023 32bit 0(FFFFFFFF) P 1 CS 001B 32bit 0(FFFFFFFF) A 0 SS 0023 32bit 0(FFFFFFFF) Z 0 DS 0023 32bit 0(FFFFFFFF) S 0 FS 0038 32bit 7FFDE000(FFF) T 0 GS 0000 NULL D 0 O 0 LastErr ERROR_INVALID_HANDLE (00000006) EFL 00010207 (NO,B,NE,BE,NS,PE,GE,G) ST0 empty +UNORM 51C0 00140558 00143C98 ST1 empty +UNORM 000C 00143AB8 00140178 ST2 empty +UNORM 0178 00000000 001451C0 ST3 empty +UNORM 4998 00143C98 00250688 ST4 empty 0.0379690874344696950e-4933 ST5 empty -UNORM FBA8 00250708 008A1410 ST6 empty 0.0379913815966686790e-4933 ST7 empty +UNORM 0178 0012FC7C 00000000 3 2 1 0 E S P U O Z D I FST 0000 Cond 0 0 0 0 Err 0 0 0 0 0 0 0 0 (GT) FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1 So I think at 0x1000B876 EBX should be 00000000 Maybe its a alignment error? I adjusted the ASM to MOV ECX,DWORD PTR DS:[ESI] that will work for me but there will be no Beep when loading the DLL.

I'm trying to load a DLL (written in D with tango) in the context of a remote process. It works fine with Windows System DLLs. So it seems that DMD creates wrong DLL files.

There are issues with DLLs and older versions of windows. Specifically, is this bug limited to Windows XP/earlier or does it also occur on Vista/Win 7?

I wonder if this was related to bug 3342. There's a good chance that this is fixed now.