[Issue 2462] New: DMD creates a wrong DLL so loading a DLL in the context of another Process via loadlibrary will crash the remote process

Nov 19, 2008

d-bugmail

Nov 19, 2008

d-bugmail

Feb 01, 2011

Rob Jacques

Mar 21, 2012

Don

November 19, 2008

[Issue 2462] New: DMD creates a wrong DLL so loading a DLL in the context of another Process via loadlibrary will crash the remote process

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http://d.puremagic.com/issues/show_bug.cgi?id=2462

           Summary: DMD creates a wrong DLL so loading a DLL in the context
                    of another Process via loadlibrary will crash the remote
                    process
           Product: D
           Version: 1.036
          Platform: PC
               URL: http://tango.pastebin.com/f7037e2fe
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P3
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: Marc-Reim@gmx.de


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.


--

http://d.puremagic.com/issues/show_bug.cgi?id=2462 ------- Comment #1 from Marc-Reim@gmx.de 2008-11-19 07:30 ------- 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. --

http://d.puremagic.com/issues/show_bug.cgi?id=2462 Rob Jacques <sandford@jhu.edu> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |sandford@jhu.edu --- Comment #2 from Rob Jacques <sandford@jhu.edu> 2011-01-31 22:32:51 PST --- 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? -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------

http://d.puremagic.com/issues/show_bug.cgi?id=2462 Don <clugdbug@yahoo.com.au> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |clugdbug@yahoo.com.au --- Comment #3 from Don <clugdbug@yahoo.com.au> 2012-03-21 01:54:28 PDT --- I wonder if this was related to bug 3342. There's a good chance that this is fixed now. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------

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